WaterSteamPro functions

    Common

    Common functions which is recommended to use.

  1. Surface tension [N/m]:

    wspSURFTENT(t)

    where:

    Based upon the IAPWS Release on The Surface Tension of Ordinary Water Substance 1995.

  2. Properties calculation result (specific volume v [m3/kg], specific internal energy u [J/kg], specific entropy s [J/(kg·K)], specific enthalpy h [J/kg], specific isochoric heat capacity Cv [J/(kg·K)], sound velocity w [m/sec], derivate of specific volume on pressure with constant temperature DVDPt [m3/(kg·Pa)], derivate of specific internal energy on pressure with constant temperature DUDPt [J/(kg·Pa)], derivate of specific entropy on pressure with constant temperature DSDPt [J/(kg·K·Pa)], derivate of specific enthalpy on pressure with constant temperature DHDPt [J/(kg·Pa)], derivate of specific volume on temperature with constant pressure DVDTp [m3/(kg·K)], derivate of specific internal energy on temperature with constant pressure DUDTp [J/(kg·K)], derivate of specific entropy on temperature with constant pressure DSDTp [J/(kg·K·K)], derivate of specific enthalpy on temperature with constant pressure DHDTp [J/(kg·K)]):

    wspVUSHCVWDERPTPT(p, t, *v, *u, *s, *h, *Cv, *w, *DVDPt, *DUDPt, *DSDPt, *DHDPt, *DVDTp, *DUDTp, *DSDTp, *DHDTp)

    where:

    This is common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA2 is used to the determining of area. After that the necessary function (wspVUSHDERPTxPT) is used. This function return the properties set, so it is significally increase calculation speed. In Mathcad this function depends upon only two arguments p and t, and return array of results in SI units system.

  3. Specific volume [m3/kg]:

    wspVPT(p, t)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA2 is used to the determining of area. After that the necessary function (wspVxPT) is used.

  4. Specific internal energy [J/kg]:

    wspUPT(p, t)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA2 is used to the determining of area. After that the necessary function (wspUxPT) is used.

  5. Specific entropy [J/(kg·K)]:

    wspSPT(p, t)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA2 is used to the determining of area. After that the necessary function (wspSxPT) is used.

  6. Specific enthalpy [J/kg]:

    wspHPT(p, t)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA2 is used to the determining of area. After that the necessary function (wspHxPT) is used.

  7. Specific isobaric heat capacity [J/(kg·K)]:

    wspCPPT(p, t)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA2 is used to the determining of area. After that the necessary function (wspCPxPT) is used.

  8. Specific isochoric heat capacity [J/(kg·K)]:

    wspCVPT(p, t)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA2 is used to the determining of area. After that the necessary function (wspCVxPT) is used.

  9. Sound velocity [m/sec]:

    wspWPT(p, t)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA2 is used to the determining of area. After that the necessary function (wspWxPT) is used.

  10. Joule-Tompson coefficient [K/Pa]:

    wspJOULETHOMPSONPT(p, t)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA2 is used to the determining of area. After that the necessary function (wspJOULETHOMPSONxPT) is used.

  11. Thermal conductivity coefficient [W/(m·K)]:

    wspTHERMCONDPT(p, t)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. For calculation used the function wspTHERMCONDRT with density from the common function wspVPT.

  12. Dynamic viscosity [Pa·sec]:

    wspDYNVISPT(p, t)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. For calculation used the function wspDYNVISRT with density from the common function wspVPT.

  13. Prandtl number []:

    wspPRANDTLEPT(p, t)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. For calculation used the formula: Pr = DYNVIS · CP / THERMCOND, where DYNVIS calculated via the function wspDYNVISPT, CP - via wspCPPT and THERMCOND - via wspTHERMCONDPT.

  14. Kinematic viscosity [m2/sec]:

    wspKINVISPT(p, t)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. For calculation used the formula: KINVIS = DYNVIS · V, where DYNVIS calculated via the function wspDYNVISPT and V - via wspVPT.

  15. Isoentropic exponent []:

    wspKPT(p, t)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. For calculation used the formula: K = W · W / (P · V), where W (sound velocity) calculated via the function wspWPT, P - pressure and V (specific volume) - via wspVPT.

  16. Specific volume [m3/kg]:

    wspVPTX(p, t, x)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA is used to the determining of area. After that the necessary function (wspVxPT or wspVSTX) is used. If the area is not the double-phase area than the vapor fraction is ignored.

  17. Specific internal energy [J/kg]:

    wspUPTX(p, t, x)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA is used to the determining of area. After that the necessary function (wspUxPT or wspUSTX) is used. If the area is not the double-phase area than the vapor fraction is ignored.

  18. Specific entropy [J/(kg·K)]:

    wspSPTX(p, t, x)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA is used to the determining of area. After that the necessary function (wspSxPT or wspSSTX) is used. If the area is not the double-phase area than the vapor fraction is ignored.

  19. Specific enthalpy [J/kg]:

    wspHPTX(p, t, x)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA is used to the determining of area. After that the necessary function (wspHxPT or wspHSTX) is used. If the area is not the double-phase area than the vapor fraction is ignored.

  20. Specific isobaric heat capacity [J/(kg·K)]:

    wspCPPTX(p, t, x)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA is used to the determining of area. After that the necessary function (wspCPxPT or wspCPSTX) is used. If the area is not the double-phase area than the vapor fraction is ignored.

  21. Specific isochoric heat capacity [J/(kg·K)]:

    wspCVPTX(p, t, x)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA is used to the determining of area. After that the necessary function (wspCVxPT or wspCVSTX) is used. If the area is not the double-phase area than the vapor fraction is ignored.

  22. Sound velocity [m/sec]:

    wspWPTX(p, t, x)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA is used to the determining of area. After that the necessary function (wspWxPT or wspWSTX) is used. If the area is not the double-phase area than the vapor fraction is ignored.

  23. Joule-Tompson coefficient [K/Pa]:

    wspJOULETHOMPSONPTX(p, t, x)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA is used to the determining of area. After that the necessary function (wspJOULETHOMPSONPT or wspJOULETHOMPSONSTX) is used. If the area is not the double-phase area than the vapor fraction is ignored.

  24. Thermal conductivity coefficient [W/(m·K)]:

    wspTHERMCONDPTX(p, t, x)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA is used to the determining of area. After that the necessary function (wspTHERMCONDPT or wspTHERMCONDSTX) is used. If the area is not the double-phase area than the vapor fraction is ignored.

  25. Dynamic viscosity [Pa·sec]:

    wspDYNVISPTX(p, t, x)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA is used to the determining of area. After that the necessary function (wspDYNVISPT or wspDYNVISSTX) is used. If the area is not the double-phase area than the vapor fraction is ignored.

  26. Prandtl number []:

    wspPRANDTLEPTX(p, t, x)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA is used to the determining of area. After that the necessary function (wspPRANDTLEPPT or wspPRANDTLEPSTX) is used. If the area is not the double-phase area than the vapor fraction is ignored.

  27. Kinematic viscosity [m2/sec]:

    wspKINVISPTX(p, t, x)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA is used to the determining of area. After that the necessary function (wspKINVISPT or wspKINVISSTX) is used. If the area is not the double-phase area than the vapor fraction is ignored.

  28. Isoentropic exponent []:

    wspKPTX(p, t, x)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREA is used to the determining of area. After that the necessary function (wspKPT or wspKSTX) is used. If the area is not the double-phase area than the vapor fraction is ignored.

  29. Temperature [K]:

    wspTPH(p, h)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPH is used to the determining of area. After that the necessary function (wspTxPH) is used.

  30. Temperature [K]:

    wspTPS(p, s)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPH is used to the determining of area. After that the necessary function (wspTxPS) is used.

  31. Specific internal energy [J/kg]:

    wspUPH(p, h)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPH is used to the determining of area. After that the necessary function (wspTxPH) is used. And the final step is calling the necessary function (wspUxPT or wspUSTX).

  32. Specific volume [m3/kg]:

    wspVPH(p, h)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPH is used to the determining of area. After that the necessary function (wspTxPH) is used. And the final step is calling the necessary function (wspVxPT or wspVSTX).

  33. Specific entropy [J/(kg·K)]:

    wspSPH(p, h)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPH is used to the determining of area. After that the necessary function (wspTxPH) is used. And the final step is calling the necessary function (wspSxPT or wspSSTX).

  34. Specific isobaric heat capacity [J/(kg·K)]:

    wspCPPH(p, h)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPH is used to the determining of area. After that the necessary function (wspTxPH) is used. And the final step is calling the necessary function (wspCPxPT or wspCPSTX).

  35. Specific isochoric heat capacity [J/(kg·K)]:

    wspCVPH(p, h)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPH is used to the determining of area. After that the necessary function (wspTxPH) is used. And the final step is calling the necessary function (wspCVxPT or wspCVSTX).

  36. Sound velocity [m/sec]:

    wspWPH(p, h)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPH is used to the determining of area. After that the necessary function (wspTxPH) is used. And the final step is calling the necessary function (wspWxPT or wspWSTX).

  37. Joule-Tompson coefficient [K/Pa]:

    wspJOULETHOMPSONPH(p, h)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPH is used to the determining of area. After that the necessary function (wspTxPH) is used. And the final step is calling the necessary function (wspJOULETHOMPSONPT or wspJOULETHOMPSONSTX).

  38. Dynamic viscosity [Pa·sec]:

    wspDYNVISPH(p, h)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPH is used to the determining of area. After that the necessary function (wspTxPH) is used. And the final step is calling the necessary function (wspDYNVISPT or wspDYNVISSTX).

  39. Kinematic viscosity [m2/sec]:

    wspKINVISPH(p, h)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPH is used to the determining of area. After that the necessary function (wspTxPH) is used. And the final step is calling the necessary function (wspKINVISPT or wspKINVISSTX).

  40. Prandtl number []:

    wspPRANDTLEPH(p, h)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPH is used to the determining of area. After that the necessary function (wspTxPH) is used. And the final step is calling the necessary function (wspPRANDTLEPT or wspPRANDTLESTX).

  41. Isoentropic exponent []:

    wspKPH(p, h)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPH is used to the determining of area. After that the necessary function (wspTxPH) is used. And the final step is calling the necessary function (wspKPT or wspKSTX).

  42. Thermal conductivity coefficient [W/(m·K)]:

    wspTHERMCONDPH(p, h)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPH is used to the determining of area. After that the necessary function (wspTxPH) is used. And the final step is calling the necessary function (wspTHERMCONDPT or wspTHERMCONDSTX).

  43. Specific internal energy [J/kg]:

    wspUPS(p, s)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPS is used to the determining of area. After that the necessary function (wspTxPS) is used. And the final step is calling the necessary function (wspUxPT or wspUSTX).

  44. Specific volume [m3/kg]:

    wspVPS(p, s)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPS is used to the determining of area. After that the necessary function (wspTxPS) is used. And the final step is calling the necessary function (wspVxPT or wspVSTX).

  45. Specific enthalpy [J/kg]:

    wspHPS(p, s)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPS is used to the determining of area. After that the necessary function (wspTxPS) is used. And the final step is calling the necessary function (wspHxPT or wspHSTX).

  46. Specific isobaric heat capacity [J/(kg·K)]:

    wspCPPS(p, s)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPS is used to the determining of area. After that the necessary function (wspTxPS) is used. And the final step is calling the necessary function (wspCPxPT or wspCPSTX).

  47. Specific isochoric heat capacity [J/(kg·K)]:

    wspCVPS(p, s)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPS is used to the determining of area. After that the necessary function (wspTxPS) is used. And the final step is calling the necessary function (wspCVxPT or wspCVSTX).

  48. Sound velocity [m/sec]:

    wspWPS(p, s)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPS is used to the determining of area. After that the necessary function (wspTxPS) is used. And the final step is calling the necessary function (wspWxPT or wspWSTX).

  49. Joule-Tompson coefficient [K/Pa]:

    wspJOULETHOMPSONPS(p, s)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPH is used to the determining of area. After that the necessary function (wspTxPS) is used. And the final step is calling the necessary function (wspJOULETHOMPSONPT or wspJOULETHOMPSONSTX).

  50. Dynamic viscosity [Pa·sec]:

    wspDYNVISPS(p, s)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPS is used to the determining of area. After that the necessary function (wspTxPS) is used. And the final step is calling the necessary function (wspDYNVISPT or wspDYNVISSTX).

  51. Kinematic viscosity [m2/sec]:

    wspKINVISPS(p, s)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPS is used to the determining of area. After that the necessary function (wspTxPS) is used. And the final step is calling the necessary function (wspKINVISPT or wspKINVISSTX).

  52. Prandtl number []:

    wspPRANDTLEPS(p, s)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPS is used to the determining of area. After that the necessary function (wspTxPS) is used. And the final step is calling the necessary function (wspPRANDTLEPT or wspPRANDLTESTX).

  53. Isoentropic exponent []:

    wspKPS(p, s)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPS is used to the determining of area. After that the necessary function (wspTxPS) is used. And the final step is calling the necessary function (wspKPT or wspKSTX).

  54. Thermal conductivity coefficient [W/(m·K)]:

    wspTHERMCONDPS(p, s)

    where:

    This is the common function. The arguments lies in all IF-97 parameters range. The function wspWATERSTATEAREAPS is used to the determining of area. After that the necessary function (wspTxPS) is used. And the final step is calling the necessary function (wspTHERMCONDPT or wspTHERMCONDSTX).

  55. Temperature [K]:

    wspTEXPANSIONPTPEFF(p0, t0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  56. Specific volume [m3/kg]:

    wspVEXPANSIONPTPEFF(p0, t0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  57. Specific internal energy [J/kg]:

    wspUEXPANSIONPTPEFF(p0, t0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  58. Specific enthalpy [J/kg]:

    wspHEXPANSIONPTPEFF(p0, t0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  59. Specific entropy [J/(kg·K)]:

    wspSEXPANSIONPTPEFF(p0, t0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  60. Specific isobaric heat capacity [J/(kg·K)]:

    wspCPEXPANSIONPTPEFF(p0, t0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  61. Specific isochoric heat capacity [J/(kg·K)]:

    wspCVEXPANSIONPTPEFF(p0, t0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  62. Sound velocity [m/sec]:

    wspWEXPANSIONPTPEFF(p0, t0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  63. Thermal conductivity coefficient [W/(m·K)]:

    wspTHERMCONDEXPANSIONPTPEFF(p0, t0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  64. Kinematic viscosity [m2/sec]:

    wspKINVISEXPANSIONPTPEFF(p0, t0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  65. Dynamic viscosity [Pa·sec]:

    wspDYNVISEXPANSIONPTPEFF(p0, t0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  66. Prandtl number []:

    wspPRANDTLEEXPANSIONPTPEFF(p0, t0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  67. Isoentropic exponent []:

    wspKEXPANSIONPTPEFF(p0, t0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  68. Joule-Tompson coefficient [K/Pa]:

    wspJOULETHOMPSONEXPANSIONPTPEFF(p0, t0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  69. Temperature [K]:

    wspTEXPANSIONPTXPEFF(p0, t0, x0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, x0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  70. Specific volume [m3/kg]:

    wspVEXPANSIONPTXPEFF(p0, t0, x0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, x0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  71. Specific internal energy [J/kg]:

    wspUEXPANSIONPTXPEFF(p0, t0, x0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, x0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  72. Specific enthalpy [J/kg]:

    wspHEXPANSIONPTXPEFF(p0, t0, x0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, x0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  73. Specific entropy [J/(kg·K)]:

    wspSEXPANSIONPTXPEFF(p0, t0, x0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, x0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  74. Specific isobaric heat capacity [J/(kg·K)]:

    wspCPEXPANSIONPTXPEFF(p0, t0, x0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, x0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  75. Specific isochoric heat capacity [J/(kg·K)]:

    wspCVEXPANSIONPTXPEFF(p0, t0, x0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, x0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  76. Sound velocity [m/sec]:

    wspWEXPANSIONPTXPEFF(p0, t0, x0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, x0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  77. Thermal conductivity coefficient [W/(m·K)]:

    wspTHERMCONDEXPANSIONPTXPEFF(p0, t0, x0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, x0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  78. Kinematic viscosity [m2/sec]:

    wspKINVISEXPANSIONPTXPEFF(p0, t0, x0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, x0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  79. Dynamic viscosity [Pa·sec]:

    wspDYNVISEXPANSIONPTXPEFF(p0, t0, x0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, x0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  80. Prandtl number []:

    wspPRANDTLEEXPANSIONPTXPEFF(p0, t0, x0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, x0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  81. Isoentropic exponent []:

    wspKEXPANSIONPTXPEFF(p0, t0, x0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, x0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  82. Joule-Tompson coefficient [K/Pa]:

    wspJOULETHOMPSONEXPANSIONPTXPEFF(p0, t0, x0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, x0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff). Note: In ActiveX object "WSP.WSPCalculator" this function named as "wspJOULETHOMPSONEXPANSIONPTXPEF" due to limitation in function name length in COM.

  83. Vapor fraction []:

    wspXEXPANSIONPTXPEFF(p0, t0, x0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, x0 to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  84. Vapor fraction []:

    wspXEXPANSIONPTPEFF(p0, t0, p1, eff)

    where:

    This is the common function. Function return the value in the end of the expansion process from the initial point with arguments p0, t0, to pressure p1 with efficiency eff. Process calculate with next formula: h1 = h0 - eff * (h0 - h1isoent), where h0 - specific enthalpy in initial point, h1 - specific enthalpy in final point of the expansion, eff - efficiency, h1isoentr - specific enthalpy in final point with isoentropic expansion (s = Const). For the calculating the process of compression you must to use instead the efficiency eff the inverse number (i.e. 1/eff).

  85. Pressure [Pa]:

    wspPHS(h, s)

    where:

    This is the common function. Function algorithm is: for given h and s determined the region of IF-97. After source parameters for specified region is calculated with functions wspPTxHS and wspRT3HS. And after that calculated the source function for sought parameter. To improve the speed of calculations you can use: disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE), vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).

  86. Temperature [K]:

    wspTHS(h, s)

    where:

    This is the common function. Function algorithm is: for given h and s determined the region of IF-97. After source parameters for specified region is calculated with functions wspPTxHS and wspRT3HS. And after that calculated the source function for sought parameter. To improve the speed of calculations you can use: disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE), vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).

  87. Properties calculation result (pressure p [Pa], temperature t [K]):

    wspPTHS(h, s, *p, *t)

    where:

    This is the common function. Function algorithm is: for given h and s determined the region of IF-97. After source parameters for specified region is calculated with functions wspPTxHS and wspRT3HS. And after that calculated the source function for sought parameter. To improve the speed of calculations you can use: disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE), vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).

  88. Specific volume [m3/kg]:

    wspVHS(h, s)

    where:

    This is the common function. Function algorithm is: for given h and s determined the region of IF-97. After source parameters for specified region is calculated with functions wspPTxHS and wspRT3HS. And after that calculated the source function for sought parameter. To improve the speed of calculations you can use: disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE), vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).

  89. Specific internal energy [J/kg]:

    wspUHS(h, s)

    where:

    This is the common function. Function algorithm is: for given h and s determined the region of IF-97. After source parameters for specified region is calculated with functions wspPTxHS and wspRT3HS. And after that calculated the source function for sought parameter. To improve the speed of calculations you can use: disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE), vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).

  90. Specific isobaric heat capacity [J/(kg·K)]:

    wspCPHS(h, s)

    where:

    This is the common function. Function algorithm is: for given h and s determined the region of IF-97. After source parameters for specified region is calculated with functions wspPTxHS and wspRT3HS. And after that calculated the source function for sought parameter. To improve the speed of calculations you can use: disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE), vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).

  91. Specific isochoric heat capacity [J/(kg·K)]:

    wspCVHS(h, s)

    where:

    This is the common function. Function algorithm is: for given h and s determined the region of IF-97. After source parameters for specified region is calculated with functions wspPTxHS and wspRT3HS. And after that calculated the source function for sought parameter. To improve the speed of calculations you can use: disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE), vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).

  92. Sound velocity [m/sec]:

    wspWHS(h, s)

    where:

    This is the common function. Function algorithm is: for given h and s determined the region of IF-97. After source parameters for specified region is calculated with functions wspPTxHS and wspRT3HS. And after that calculated the source function for sought parameter. To improve the speed of calculations you can use: disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE), vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).

  93. Joule-Tompson coefficient [K/Pa]:

    wspJOULETHOMPSONHS(h, s)

    where:

    This is the common function. Function algorithm is: for given h and s determined the region of IF-97. After source parameters for specified region is calculated with functions wspPTxHS and wspRT3HS. And after that calculated the source function for sought parameter. To improve the speed of calculations you can use: disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE), vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).

  94. Thermal conductivity coefficient [W/(m·K)]:

    wspTHERMCONDHS(h, s)

    where:

    This is the common function. Function algorithm is: for given h and s determined the region of IF-97. After source parameters for specified region is calculated with functions wspPTxHS and wspRT3HS. And after that calculated the source function for sought parameter. To improve the speed of calculations you can use: disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE), vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).

  95. Dynamic viscosity [Pa·sec]:

    wspDYNVISHS(h, s)

    where:

    This is the common function. Function algorithm is: for given h and s determined the region of IF-97. After source parameters for specified region is calculated with functions wspPTxHS and wspRT3HS. And after that calculated the source function for sought parameter. To improve the speed of calculations you can use: disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE), vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).

  96. Prandtl number []:

    wspPRANDTLEHS(h, s)

    where:

    This is the common function. Function algorithm is: for given h and s determined the region of IF-97. After source parameters for specified region is calculated with functions wspPTxHS and wspRT3HS. And after that calculated the source function for sought parameter. To improve the speed of calculations you can use: disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE), vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).

  97. Kinematic viscosity [m2/sec]:

    wspKINVISHS(h, s)

    where:

    This is the common function. Function algorithm is: for given h and s determined the region of IF-97. After source parameters for specified region is calculated with functions wspPTxHS and wspRT3HS. And after that calculated the source function for sought parameter. To improve the speed of calculations you can use: disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE), vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).

  98. Isoentropic exponent []:

    wspKHS(h, s)

    where:

    This is the common function. Function algorithm is: for given h and s determined the region of IF-97. After source parameters for specified region is calculated with functions wspPTxHS and wspRT3HS. And after that calculated the source function for sought parameter. To improve the speed of calculations you can use: disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE), vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).

  99. Vapor fraction []:

    wspXHS(h, s)

    where:

    This is the common function. Function algorithm is: for given h and s determined the region of IF-97. If this region is double-phase area then calculated the sought parameter. To improve the speed of calculations you can use: disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE), vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).

  100. Vapor fraction []:

    wspXPH(p, h)

    where:

    This is the common function. Function algorithm is: for given p and h determined the region of IF-97. If this region is double-phase area then calculated the sought parameter.

  101. Vapor fraction []:

    wspXPS(p, s)

    where:

    This is the common function. Function algorithm is: for given p and s determined the region of IF-97. If this region is double-phase area then calculated the sought parameter.

    102. MetaStable

    Functions for calculating properties of meta-stable supercooled steam

  102. Specific volume of meta-stable supercooled steam [m3/kg]:

    wspVMSPT(p, t)

    where:

    This function calculate the properties of super-cooled steam (in meta-stable area). The parameters range lie below pressure 10 MPa and vapor fraction above 95%. For calculating used the special formulation for calculating meta-stable area based upon IAPWS IF-97.

  103. Specific internal energy of meta-stable supercooled steam [J/kg]:

    wspUMSPT(p, t)

    where:

    This function calculate the properties of super-cooled steam (in meta-stable area). The parameters range lie below pressure 10 MPa and vapor fraction above 95%. For calculating used the special formulation for calculating meta-stable area based upon IAPWS IF-97.

  104. Specific entropy of meta-stable supercooled steam [J/(kg·K)]:

    wspSMSPT(p, t)

    where:

    This function calculate the properties of super-cooled steam (in meta-stable area). The parameters range lie below pressure 10 MPa and vapor fraction above 95%. For calculating used the special formulation for calculating meta-stable area based upon IAPWS IF-97.

  105. Specific enthalpy of meta-stable supercooled steam [J/kg]:

    wspHMSPT(p, t)

    where:

    This function calculate the properties of super-cooled steam (in meta-stable area). The parameters range lie below pressure 10 MPa and vapor fraction above 95%. For calculating used the special formulation for calculating meta-stable area based upon IAPWS IF-97.

  106. Specific isobaric heat capacity of meta-stable supercooled steam [J/(kg·K)]:

    wspCPMSPT(p, t)

    where:

    This function calculate the properties of super-cooled steam (in meta-stable area). The parameters range lie below pressure 10 MPa and vapor fraction above 95%. For calculating used the special formulation for calculating meta-stable area based upon IAPWS IF-97.

  107. Specific isochoric heat capacity of meta-stable supercooled steam [J/(kg·K)]:

    wspCVMSPT(p, t)

    where:

    This function calculate the properties of super-cooled steam (in meta-stable area). The parameters range lie below pressure 10 MPa and vapor fraction above 95%. For calculating used the special formulation for calculating meta-stable area based upon IAPWS IF-97.

  108. Sound velocity of meta-stable supercooled steam [m/sec]:

    wspWMSPT(p, t)

    where:

    This function calculate the properties of super-cooled steam (in meta-stable area). The parameters range lie below pressure 10 MPa and vapor fraction above 95%. For calculating used the special formulation for calculating meta-stable area based upon IAPWS IF-97.

  109. Thermal conductivity coefficient of meta-stable supercooled steam [W/(m·K)]:

    wspTHERMCONDMSPT(p, t)

    where:

    This function calculate the properties of super-cooled steam (in meta-stable area). The parameters range lie below pressure 10 MPa and vapor fraction above 95%. For calculating used the special formulation for calculating meta-stable area based upon IAPWS IF-97.

  110. Dynamic viscosity of meta-stable supercooled steam [Pa·sec]:

    wspDYNVISMSPT(p, t)

    where:

    This function calculate the properties of super-cooled steam (in meta-stable area). The parameters range lie below pressure 10 MPa and vapor fraction above 95%. For calculating used the special formulation for calculating meta-stable area based upon IAPWS IF-97.

  111. Prandtl number of meta-stable supercooled steam []:

    wspPRANDTLEMSPT(p, t)

    where:

    This function calculate the properties of super-cooled steam (in meta-stable area). The parameters range lie below pressure 10 MPa and vapor fraction above 95%. For calculating used the special formulation for calculating meta-stable area based upon IAPWS IF-97.

  112. Kinematic viscosity of meta-stable supercooled steam [m2/sec]:

    wspKINVISMSPT(p, t)

    where:

    This function calculate the properties of super-cooled steam (in meta-stable area). The parameters range lie below pressure 10 MPa and vapor fraction above 95%. For calculating used the special formulation for calculating meta-stable area based upon IAPWS IF-97.

  113. Isoentropic exponent of meta-stable supercooled steam []:

    wspKMSPT(p, t)

    where:

    This function calculate the properties of super-cooled steam (in meta-stable area). The parameters range lie below pressure 10 MPa and vapor fraction above 95%. For calculating used the special formulation for calculating meta-stable area based upon IAPWS IF-97.

  114. Joule-Tompson coefficient of meta-stable supercooled steam [K/Pa]:

    wspJOULETHOMPSONMSPT(p, t)

    where:

    This function calculate the properties of super-cooled steam (in meta-stable area). The parameters range lie below pressure 10 MPa and vapor fraction above 95%. For calculating used the special formulation for calculating meta-stable area based upon IAPWS IF-97.

    115. Source

    Functions from IAPWS IF-97 and other formulations.

  115. Pressure at line between areas 2 and 3 [Pa]:

    wspP23T(t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. Used in function wspWATERSTATEAREA when area is determined.

  116. Temperature at line between areas 2 and 3 [K]:

    wspT23P(p)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. Used in function wspWATERSTATEAREA when area is determined.

  117. Water state area:

    wspWATERSTATEAREA(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam areas allocation for determining area. Used in common functions.

    Note: Function result have type "long".

  118. Water state area (version 2):

    wspWATERSTATEAREA2(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam areas allocation for determining area (version 2 - without area 4 - saturation line). Used in common functions.

    Note: Function result have type "long".

  119. Thermal conductivity coefficient [W/(m·K)]:

    wspTHERMCONDRT(r, t)

    where:

    Based upon the IAPWS Formulation 1985 for thermal Conductivity with ITS-90 (International Temperature Scale) correction.

  120. Dynamic viscosity [Pa·sec]:

    wspDYNVISRT(r, t)

    where:

    Based upon the IAPWS Formulation 1985 for the Viscosity of Ordinary Water Substance with ITS-90 (International Temperature Scale) correction.

  121. Specific volume in area 1 [m3/kg]:

    wspV1PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  122. Specific internal energy in area 1 [J/kg]:

    wspU1PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  123. Specific entropy in area 1 [J/(kg·K)]:

    wspS1PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  124. Specific enthalpy in area 1 [J/kg]:

    wspH1PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  125. Specific isobaric heat capacity in area 1 [J/(kg·K)]:

    wspCP1PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  126. Specific isochoric heat capacity in area 1 [J/(kg·K)]:

    wspCV1PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  127. Sound velocity in area 1 [m/sec]:

    wspW1PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  128. Joule-Tompson coefficient in area 1 [K/Pa]:

    wspJOULETHOMPSON1PT(p, t)

    where:

    Function use the formula: JT = (T*dV/dT - V)/Cp, where T - temperature, dV/dT - differential quotient (dV/dT)p, V - volume, Cp - isobaric heat capacity (Cp).

  129. Properties calculation result in area 1 (specific volume v [m3/kg], specific internal energy u [J/kg], specific entropy s [J/(kg·K)], specific enthalpy h [J/kg], specific isochoric heat capacity Cv [J/(kg·K)], sound velocity w [m/sec], derivate of specific volume on pressure with constant temperature DVDPt [m3/(kg·Pa)], derivate of specific internal energy on pressure with constant temperature DUDPt [J/(kg·Pa)], derivate of specific entropy on pressure with constant temperature DSDPt [J/(kg·K·Pa)], derivate of specific enthalpy on pressure with constant temperature DHDPt [J/(kg·Pa)], derivate of specific volume on temperature with constant pressure DVDTp [m3/(kg·K)], derivate of specific internal energy on temperature with constant pressure DUDTp [J/(kg·K)], derivate of specific entropy on temperature with constant pressure DSDTp [J/(kg·K·K)], derivate of specific enthalpy on temperature with constant pressure DHDTp [J/(kg·K)]):

    wspVUSHCVWDERPT1PT(p, t, *v, *u, *s, *h, *Cv, *w, *DVDPt, *DUDPt, *DSDPt, *DHDPt, *DVDTp, *DUDTp, *DSDTp, *DHDTp)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. This function return the properties set, so it is significally increase calculation speed. In Mathcad this function depends upon only two arguments p and t, and return array of results in SI units system.

  130. Specific volume in area 2 [m3/kg]:

    wspV2PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  131. Specific internal energy in area 2 [J/kg]:

    wspU2PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  132. Specific entropy in area 2 [J/(kg·K)]:

    wspS2PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  133. Specific enthalpy in area 2 [J/kg]:

    wspH2PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  134. Specific isobaric heat capacity in area 2 [J/(kg·K)]:

    wspCP2PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  135. Specific isochoric heat capacity in area 2 [J/(kg·K)]:

    wspCV2PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  136. Sound velocity in area 2 [m/sec]:

    wspW2PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  137. Joule-Tompson coefficient in area 2 [K/Pa]:

    wspJOULETHOMPSON2PT(p, t)

    where:

    Function use the formula: JT = (T*dV/dT - V)/Cp, where T - temperature, dV/dT - differential quotient (dV/dT)p, V - volume, Cp - isobaric heat capacity (Cp).

  138. Properties calculation result in area 2 (specific volume v [m3/kg], specific internal energy u [J/kg], specific entropy s [J/(kg·K)], specific enthalpy h [J/kg], specific isochoric heat capacity Cv [J/(kg·K)], sound velocity w [m/sec], derivate of specific volume on pressure with constant temperature DVDPt [m3/(kg·Pa)], derivate of specific internal energy on pressure with constant temperature DUDPt [J/(kg·Pa)], derivate of specific entropy on pressure with constant temperature DSDPt [J/(kg·K·Pa)], derivate of specific enthalpy on pressure with constant temperature DHDPt [J/(kg·Pa)], derivate of specific volume on temperature with constant pressure DVDTp [m3/(kg·K)], derivate of specific internal energy on temperature with constant pressure DUDTp [J/(kg·K)], derivate of specific entropy on temperature with constant pressure DSDTp [J/(kg·K·K)], derivate of specific enthalpy on temperature with constant pressure DHDTp [J/(kg·K)]):

    wspVUSHCVWDERPT2PT(p, t, *v, *u, *s, *h, *Cv, *w, *DVDPt, *DUDPt, *DSDPt, *DHDPt, *DVDTp, *DUDTp, *DSDTp, *DHDTp)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. This function return the properties set, so it is significally increase calculation speed. In Mathcad this function depends upon only two arguments p and t, and return array of results in SI units system.

  139. Pressure in area 3 [Pa]:

    wspP3RT(r, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  140. Density in area 3 [kg/m3]:

    wspR3PTR0(p, t, r0)

    where:

    Use Newton method with initial value to determine the density from p and t. Used for unification of calculation properties in all IF-97 areas.

  141. Density in area 3 [kg/m3]:

    wspR3PT(p, t)

    where:

    Calculate the density in area 3 with function wspR3PTR0 with the corresponding initial values for water and steam. Used for unification of calculation properties in all IF-97 areas.

  142. Specific internal energy in area 3 [J/kg]:

    wspU3RT(r, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  143. Specific entropy in area 3 [J/(kg·K)]:

    wspS3RT(r, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  144. Specific enthalpy in area 3 [J/kg]:

    wspH3RT(r, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  145. Specific isobaric heat capacity in area 3 [J/(kg·K)]:

    wspCP3RT(r, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  146. Specific isochoric heat capacity in area 3 [J/(kg·K)]:

    wspCV3RT(r, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  147. Sound velocity in area 3 [m/sec]:

    wspW3RT(r, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  148. Properties calculation result in area 3 (specific volume v [m3/kg], specific internal energy u [J/kg], specific entropy s [J/(kg·K)], specific enthalpy h [J/kg], specific isochoric heat capacity Cv [J/(kg·K)], sound velocity w [m/sec], derivate of specific volume on pressure with constant temperature DVDPt [m3/(kg·Pa)], derivate of specific internal energy on pressure with constant temperature DUDPt [J/(kg·Pa)], derivate of specific entropy on pressure with constant temperature DSDPt [J/(kg·K·Pa)], derivate of specific enthalpy on pressure with constant temperature DHDPt [J/(kg·Pa)], derivate of specific volume on temperature with constant pressure DVDTp [m3/(kg·K)], derivate of specific internal energy on temperature with constant pressure DUDTp [J/(kg·K)], derivate of specific entropy on temperature with constant pressure DSDTp [J/(kg·K·K)], derivate of specific enthalpy on temperature with constant pressure DHDTp [J/(kg·K)]):

    wspVUSHCVWDERPT3RT(r, t, *v, *u, *s, *h, *Cv, *w, *DVDPt, *DUDPt, *DSDPt, *DHDPt, *DVDTp, *DUDTp, *DSDTp, *DHDTp)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. This function return the properties set, so it is significally increase calculation speed. In Mathcad this function depends upon only two arguments p and t, and return array of results in SI units system.

  149. Specific volume in area 3 [m3/kg]:

    wspV3PT(p, t)

    where:

    Based upon function wspR3PT.

  150. Specific internal energy in area 3 [J/kg]:

    wspU3PT(p, t)

    where:

    Based upon functions wspR3PT and wspU3RT.

  151. Specific entropy in area 3 [J/(kg·K)]:

    wspS3PT(p, t)

    where:

    Based upon functions wspR3PT and wspS3RT.

  152. Specific enthalpy in area 3 [J/kg]:

    wspH3PT(p, t)

    where:

    Based upon functions wspR3PT and wspH3RT.

  153. Specific isobaric heat capacity in area 3 [J/(kg·K)]:

    wspCP3PT(p, t)

    where:

    Based upon functions wspR3PT and wspCP3RT.

  154. Specific isochoric heat capacity in area 3 [J/(kg·K)]:

    wspCV3PT(p, t)

    where:

    Based upon functions wspR3PT and wspCV3RT.

  155. Sound velocity in area 3 [m/sec]:

    wspW3PT(p, t)

    where:

    Based upon functions wspR3PT and wspW3RT.

  156. Joule-Tompson coefficient in area 3 [K/Pa]:

    wspJOULETHOMPSON3RT(r, t)

    where:

    Calculate the Joule-Tompson coefficient for area 3 of IF-97 Formulation.

  157. Joule-Tompson coefficient in area 3 [K/Pa]:

    wspJOULETHOMPSON3PT(p, t)

    where:

    Calculate the Joule-Tompson coefficient for area 3 of IF-97 Formulation. This function use for the first function wspR3PT(p, t) for calculating density and after return the value from the function wspJOULETHOMPSON3RT(r, t).

  158. Properties calculation result in area 3 (specific volume v [m3/kg], specific internal energy u [J/kg], specific entropy s [J/(kg·K)], specific enthalpy h [J/kg], specific isochoric heat capacity Cv [J/(kg·K)], sound velocity w [m/sec], derivate of specific volume on pressure with constant temperature DVDPt [m3/(kg·Pa)], derivate of specific internal energy on pressure with constant temperature DUDPt [J/(kg·Pa)], derivate of specific entropy on pressure with constant temperature DSDPt [J/(kg·K·Pa)], derivate of specific enthalpy on pressure with constant temperature DHDPt [J/(kg·Pa)], derivate of specific volume on temperature with constant pressure DVDTp [m3/(kg·K)], derivate of specific internal energy on temperature with constant pressure DUDTp [J/(kg·K)], derivate of specific entropy on temperature with constant pressure DSDTp [J/(kg·K·K)], derivate of specific enthalpy on temperature with constant pressure DHDTp [J/(kg·K)]):

    wspVUSHCVWDERPT3PT(p, t, *v, *u, *s, *h, *Cv, *w, *DVDPt, *DUDPt, *DSDPt, *DHDPt, *DVDTp, *DUDTp, *DSDTp, *DHDTp)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. This function return the properties set, so it is significally increase calculation speed. In Mathcad this function depends upon only two arguments p and t, and return array of results in SI units system.

  159. Specific volume in area 5 [m3/kg]:

    wspV5PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  160. Specific internal energy in area 5 [J/kg]:

    wspU5PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  161. Specific entropy in area 5 [J/(kg·K)]:

    wspS5PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  162. Specific enthalpy in area 5 [J/kg]:

    wspH5PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  163. Specific isobaric heat capacity in area 5 [J/(kg·K)]:

    wspCP5PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  164. Specific isochoric heat capacity in area 5 [J/(kg·K)]:

    wspCV5PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  165. Sound velocity in area 5 [m/sec]:

    wspW5PT(p, t)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  166. Joule-Tompson coefficient in area 5 [K/Pa]:

    wspJOULETHOMPSON5PT(p, t)

    where:

    Function use the formula: JT = (T*dV/dT - V)/Cp, where T - temperature, dV/dT - differential quotient (dV/dT)p, V - volume, Cp - isobaric heat capacity (Cp).

  167. Properties calculation result in area 5 (specific volume v [m3/kg], specific internal energy u [J/kg], specific entropy s [J/(kg·K)], specific enthalpy h [J/kg], specific isochoric heat capacity Cv [J/(kg·K)], sound velocity w [m/sec], derivate of specific volume on pressure with constant temperature DVDPt [m3/(kg·Pa)], derivate of specific internal energy on pressure with constant temperature DUDPt [J/(kg·Pa)], derivate of specific entropy on pressure with constant temperature DSDPt [J/(kg·K·Pa)], derivate of specific enthalpy on pressure with constant temperature DHDPt [J/(kg·Pa)], derivate of specific volume on temperature with constant pressure DVDTp [m3/(kg·K)], derivate of specific internal energy on temperature with constant pressure DUDTp [J/(kg·K)], derivate of specific entropy on temperature with constant pressure DSDTp [J/(kg·K·K)], derivate of specific enthalpy on temperature with constant pressure DHDTp [J/(kg·K)]):

    wspVUSHCVWDERPT5PT(p, t, *v, *u, *s, *h, *Cv, *w, *DVDPt, *DUDPt, *DSDPt, *DHDPt, *DVDTp, *DUDTp, *DSDTp, *DHDTp)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. This function return the properties set, so it is significally increase calculation speed. In Mathcad this function depends upon only two arguments p and t, and return array of results in SI units system.

  168. Temperature in area 1 [K]:

    wspT1PH(p, h)

    where:

    Based upon the Additional Formulations for the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  169. Temperature in area 1 [K]:

    wspT1PS(p, s)

    where:

    Based upon the Additional Formulations for the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  170. Pressure in area 1 [Pa]:

    wspP1HS(h, s)

    where:

    Based upon the "Supplementary Release on Backward Equations for Pressure as a Function of Enthalpy and Entropy p(h,s) to the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam" (September 2001).

  171. Temperature in area 1 [K]:

    wspT1HS(h, s)

    where:

    Based upon the "Supplementary Release on Backward Equations for Pressure as a Function of Enthalpy and Entropy p(h,s) to the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam" (September 2001).

  172. Properties calculation result in area 1 (pressure p [Pa], temperature t [K]):

    wspPT1RH(r, h, *p, *t)

    where:

    Based upon the source equations of IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. The function use the Newton method for determine the roots of function.

  173. Temperature in area 2a [K]:

    wspT2APH(p, h)

    where:

    Based upon the Additional Formulations for the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  174. Temperature in area 2a [K]:

    wspT2APS(p, s)

    where:

    Based upon the Additional Formulations for the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  175. Temperature in area 2b [K]:

    wspT2BPH(p, h)

    where:

    Based upon the Additional Formulations for the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  176. Temperature in area 2b [K]:

    wspT2BPS(p, s)

    where:

    Based upon the Additional Formulations for the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  177. Temperature in area 2c [K]:

    wspT2CPH(p, h)

    where:

    Based upon the Additional Formulations for the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  178. Temperature in area 2c [K]:

    wspT2CPS(p, s)

    where:

    Based upon the Additional Formulations for the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  179. Temperature in area 2 [K]:

    wspT2PH(p, h)

    where:

    Based upon functions wspT2APH, wspT2BPH and wspT2CPH.

  180. Temperature in area 2 [K]:

    wspT2PS(p, s)

    where:

    Based upon functions wspT2APS, wspT2BPS and wspT2CPS.

  181. Pressure in area 2 [Pa]:

    wspP2HS(h, s)

    where:

    Based upon the "Supplementary Release on Backward Equations for Pressure as a Function of Enthalpy and Entropy p(h,s) to the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam" (September 2001). Internally used the functions: wspP2AHS(h, s), wspP2BHS(h, s) and wspP2CHS(h, s).

  182. Temperature in area 2 [K]:

    wspT2HS(h, s)

    where:

    Based upon the "Supplementary Release on Backward Equations for Pressure as a Function of Enthalpy and Entropy p(h,s) to the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam" (September 2001).

  183. Properties calculation result in area 2 (pressure p [Pa], temperature t [K]):

    wspPT2RH(r, h, *p, *t)

    where:

    Based upon the source equations of IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. The function use the Newton method for determine the roots of function.

  184. Temperature in area 3 [K]:

    wspT3PH(p, h)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. The function use the Newton method for determine the root of function with two arguments.

  185. Temperature in area 3 [K]:

    wspT3PS(p, s)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. The function use the Newton method for determine the root of function with two arguments.

  186. Pressure in area 3 [Pa]:

    wspP3HS(h, s)

    where:

    Based upon the "Supplementary Release on Backward Equations for p(h, s) for Region 3, Equations as a Function of h and s for the Region Boundaries, and a Equation Tsat(h, s) for Wet Steam of the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam" (September 2004).

  187. Temperature in area 3 [K]:

    wspT3HS(h, s)

    where:

    Based upon the "Supplementary Release on Backward Equations for p(h, s) for Region 3, Equations as a Function of h and s for the Region Boundaries, and a Equation Tsat(h, s) for Wet Steam of the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam" (September 2004).

  188. Specific volume in area 3 [m3/kg]:

    wspV3HS(h, s)

    where:

    Based upon the "Supplementary Release on Backward Equations for p(h, s) for Region 3, Equations as a Function of h and s for the Region Boundaries, and a Equation Tsat(h, s) for Wet Steam of the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam" (September 2004).

  189. Specific volume in area 3 [m3/kg]:

    wspV3PH(p, h)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. The function use the Newton method for determine the root of function with two arguments.

  190. Specific volume in area 3 [m3/kg]:

    wspV3PS(p, s)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. The function use the Newton method for determine the root of function with two arguments.

  191. Temperature in area 3 [K]:

    wspT3RH(r, h)

    where:

    Based upon the source equations of IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. The function use the Newton method for determine the root of function.

  192. Temperature in area 5 [K]:

    wspT5PH(p, h)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. The function use the Newton method for determine the root of function with two arguments.

  193. Temperature in area 5 [K]:

    wspT5PS(p, s)

    where:

    Based upon the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. The function use the Newton method for determine the root of function with two arguments.

  194. Properties calculation result in area 5 (pressure p [Pa], temperature t [K]):

    wspPT5RH(r, h, *p, *t)

    where:

    Based upon the source equations of IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam. The function use the Newton method for determine the roots of function.

  195. Pressure at line between areas 2b and 2c [Pa]:

    wspP2B2CH(h)

    where:

    Based upon the Additional Formulation for the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  196. Specific enthalpy at line between areas 2b and 2c [J/kg]:

    wspH2B2CP(p)

    where:

    Based upon the Additional Formulation for the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam.

  197. Water state area:

    wspWATERSTATEAREAPH(p, h)

    where:

    Based upon the Additional Formulation for the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam areas allocation for determining area. Used in common functions.

    Note: Function result have type "long".

  198. Water state area:

    wspWATERSTATEAREAPS(p, s)

    where:

    Based upon the Additional Formulation for the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam areas allocation for determining area. Used in common functions.

    Note: Function result have type "long".

  199. Area of phase state:

    wspPHASESTATEPT(p, t)

    where:

    Function return code of phase state in point given by (p, t). Function result calculated with next rules: if pressure p or temperature t more than critical ones (Prk or Tkr), the result is "3" (phase state - supercritical). If the point situated above the saturation line (in P-T diagramm) then the result is "1" (phase state - liquid). If the point situated below the saturation line (in P-T diagram) then the result is "2" (phase state - steam). If point situated below triple point, then the return value is error value ("-1").

    Note: Function result have type "long".

  200. Water state area:

    wspWATERSTATEAREAHS(h, s)

    where:

    Based upon the Additional Formulation for the IAPWS Industrial Formulation 1997 for thermodynamic Properties of Water and Steam areas allocation for determining area. Used in common functions.

    Note: Function result have type "long".

  201. Temperature at boundary line between areas 2 and 3 [K]:

    wspTB23HS(h, s)

    where:

    Based upon the "Supplementary Release on Backward Equations for p(h, s) for Region 3, Equations as a Function of h and s for the Region Boundaries, and a Equation Tsat(h, s) for Wet Steam of the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam" (September 2004).

  202. Pressure at boundary line between areas 2 and 3 [Pa]:

    wspPB23HS(h, s)

    where:

    Based upon the "Supplementary Release on Backward Equations for p(h, s) for Region 3, Equations as a Function of h and s for the Region Boundaries, and a Equation Tsat(h, s) for Wet Steam of the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam" (September 2004).

  203. Specific enthalpy at boundary line between areas 1 and 3 [J/kg]:

    wspHB13S(s)

    where:

    Based upon the "Supplementary Release on Backward Equations for p(h, s) for Region 3, Equations as a Function of h and s for the Region Boundaries, and a Equation Tsat(h, s) for Wet Steam of the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam" (September 2004).

  204. Pressure in area 5 [Pa]:

    wspP5HS(h, s)

    where:

    To find the pressure in area 5 Newton method used.

  205. Temperature in area 5 [K]:

    wspT5HS(h, s)

    where:

    To find the temperature in area 5 Newton method used.

  206. Properties calculation result in area 1 (pressure p [Pa], temperature t [K]):

    wspPT1HS(h, s, *p, *t)

    where:

    To find the parameters in area 1 Newton method used.

  207. Properties calculation result in area 2 (pressure p [Pa], temperature t [K]):

    wspPT2HS(h, s, *p, *t)

    where:

    To find the parameters in area 2 Newton method used.

  208. Properties calculation result in area 3 (density r [kg/m3], temperature t [K]):

    wspRT3HS(h, s, *r, *t)

    where:

    To find the parameters in area 3 Newton method used.

  209. Properties calculation result in area 3 (pressure p [Pa], temperature t [K]):

    wspPT3HS(h, s, *p, *t)

    where:

    Function based on function wspRT3HS. After call to wspRT3HS used the standard equations to determine the pressure.

  210. Properties calculation result in area 5 (pressure p [Pa], temperature t [K]):

    wspPT5HS(h, s, *p, *t)

    where:

    To find the parameters in area 5 Newton method used.

    211. Saturation Line

    Functions of properties at saturation line.

  211. Pressure at saturation line [Pa]:

    wspPST(t)

    where:

    Based upon the Supplementary Release on Saturation Properties of Ordinary Water Substance from IAPWS.

  212. Derivative of saturation pressure on saturation temperature [Pa/K]:

    wspDPDTST(t)

    where:

    Functions is based upon "Supplementary Release on Saturation Properties of Ordinary Water Substance" from International Association for the Properties of Water and Steam.

  213. Temperature at saturation line [K]:

    wspTSP(p)

    where:

    Based upon the Supplementary Release on Saturation Properties of Ordinary Water Substance from IAPWS.

  214. Specific volume of steam at saturation line [m3/kg]:

    wspVSST(t)

    where:

  215. Specific volume of water at saturation line [m3/kg]:

    wspVSWT(t)

    where:

  216. Rough value of density of steam at saturation line [kg/m3]:

    wspROUGHRSST(t)

    where:

    This function allow to quickly calculate rough value of density of steam at saturation line.

  217. Rough value of density of water at saturation line [kg/m3]:

    wspROUGHRSWT(t)

    where:

    This function allow to quickly calculate rough value of density of water at saturation line.

  218. Specific internal energy of steam at saturation line [J/kg]:

    wspUSST(t)

    where:

  219. Specific internal energy of water at saturation line [J/kg]:

    wspUSWT(t)

    where:

  220. Specific entropy of steam at saturation line [J/(kg·K)]:

    wspSSST(t)

    where:

  221. Specific entropy of water at saturation line [J/(kg·K)]:

    wspSSWT(t)

    where:

  222. Specific enthalpy of steam at saturation line [J/kg]:

    wspHSST(t)

    where:

  223. Specific enthalpy of water at saturation line [J/kg]:

    wspHSWT(t)

    where:

  224. Specific isobaric heat capacity of steam at saturation line [J/(kg·K)]:

    wspCPSST(t)

    where:

  225. Specific isobaric heat capacity of water at saturation line [J/(kg·K)]:

    wspCPSWT(t)

    where:

  226. Specific isochoric heat capacity of steam at saturation line from the one-phase region [J/(kg·K)]:

    wspCVSST(t)

    where:

  227. Specific isochoric heat capacity of water at saturation line from the one-phase region [J/(kg·K)]:

    wspCVSWT(t)

    where:

  228. Specific isochoric heat capacity of steam at saturation line from the double-phase region [J/(kg·K)]:

    wspCVDPSST(t)

    where:

    Function return the sum of specific isochoric heat capacity of steam from one-phase region (function wspCVSST) and additiona increment, the last calculated with corresponding thermodynamic formulas.

  229. Specific isochoric heat capacity of water at saturation line from the double-phase region [J/(kg·K)]:

    wspCVDPSWT(t)

    where:

    Function return the sum of specific isochoric heat capacity of water from one-phase region (function wspCVSWT) and additiona increment, the last calculated with corresponding thermodynamic formulas.

  230. Sound velocity in steam at saturation line [m/sec]:

    wspWSST(t)

    where:

  231. Sound velocity in water at saturation line [m/sec]:

    wspWSWT(t)

    where:

  232. Joule-Tompson coefficient of steam at saturation line [K/Pa]:

    wspJOULETHOMPSONSST(t)

    where:

  233. Joule-Tompson coefficient of water at saturation line [K/Pa]:

    wspJOULETHOMPSONSWT(t)

    where:

  234. Thermal conductivity coefficient of steam at saturation line [W/(m·K)]:

    wspTHERMCONDSST(t)

    where:

  235. Thermal conductivity coefficient of water at saturation line [W/(m·K)]:

    wspTHERMCONDSWT(t)

    where:

  236. Dynamic viscosity of steam at saturation line [Pa·sec]:

    wspDYNVISSST(t)

    where:

  237. Dynamic viscosity of water at saturation line [Pa·sec]:

    wspDYNVISSWT(t)

    where:

  238. Prandtl number of steam at saturation line []:

    wspPRANDTLESST(t)

    where:

  239. Prandtl number of water at saturation line []:

    wspPRANDTLESWT(t)

    where:

  240. Kinematic viscosity of steam at saturation line [m2/sec]:

    wspKINVISSST(t)

    where:

  241. Kinematic viscosity of water at saturation line [m2/sec]:

    wspKINVISSWT(t)

    where:

  242. Isoentropic exponent of steam at saturation line []:

    wspKSST(t)

    where:

  243. Isoentropic exponent of water at saturation line []:

    wspKSWT(t)

    where:

  244. Specific evaporation heat [J/kg]:

    wspRST(t)

    where:

    Calculate as r = (hs - hw), where hs - specific enthalpy of steam at saturation line, hw - specific enthalpy of water at saturation line.

  245. Properties calculation result for water at saturation line (specific volume v [m3/kg], specific internal energy u [J/kg], specific entropy s [J/(kg·K)], specific enthalpy h [J/kg], specific isochoric heat capacity Cv [J/(kg·K)], sound velocity w [m/sec], derivate of specific volume on pressure with constant temperature DVDPt [m3/(kg·Pa)], derivate of specific internal energy on pressure with constant temperature DUDPt [J/(kg·Pa)], derivate of specific entropy on pressure with constant temperature DSDPt [J/(kg·K·Pa)], derivate of specific enthalpy on pressure with constant temperature DHDPt [J/(kg·Pa)], derivate of specific volume on temperature with constant pressure DVDTp [m3/(kg·K)], derivate of specific internal energy on temperature with constant pressure DUDTp [J/(kg·K)], derivate of specific entropy on temperature with constant pressure DSDTp [J/(kg·K·K)], derivate of specific enthalpy on temperature with constant pressure DHDTp [J/(kg·K)]):

    wspVUSHCVWDERPTSWT(t, *v, *u, *s, *h, *Cv, *w, *DVDPt, *DUDPt, *DSDPt, *DHDPt, *DVDTp, *DUDTp, *DSDTp, *DHDTp)

    where:

    Function based upon IF-97 formulation. This function return the properties set, so it is significally increase calculation speed. In Mathcad this function depends upon only one argument t, and return array of results in SI units system.

  246. Properties calculation result for steam at saturation line (specific volume v [m3/kg], specific internal energy u [J/kg], specific entropy s [J/(kg·K)], specific enthalpy h [J/kg], specific isochoric heat capacity Cv [J/(kg·K)], sound velocity w [m/sec], derivate of specific volume on pressure with constant temperature DVDPt [m3/(kg·Pa)], derivate of specific internal energy on pressure with constant temperature DUDPt [J/(kg·Pa)], derivate of specific entropy on pressure with constant temperature DSDPt [J/(kg·K·Pa)], derivate of specific enthalpy on pressure with constant temperature DHDPt [J/(kg·Pa)], derivate of specific volume on temperature with constant pressure DVDTp [m3/(kg·K)], derivate of specific internal energy on temperature with constant pressure DUDTp [J/(kg·K)], derivate of specific entropy on temperature with constant pressure DSDTp [J/(kg·K·K)], derivate of specific enthalpy on temperature with constant pressure DHDTp [J/(kg·K)]):

    wspVUSHCVWDERPTSST(t, *v, *u, *s, *h, *Cv, *w, *DVDPt, *DUDPt, *DSDPt, *DHDPt, *DVDTp, *DUDTp, *DSDTp, *DHDTp)

    where:

    Function based upon IF-97 formulation. This function return the properties set, so it is significally increase calculation speed. In Mathcad this function depends upon only one argument t, and return array of results in SI units system.

  247. Specific enthalpy of steam at saturation line [J/kg]:

    wspROUGHHSSS(s)

    where:

    Function used the special function from Supplementory Release for IF-97 Formulation.

  248. Specific enthalpy of water at saturation line [J/kg]:

    wspROUGHHSWS(s)

    where:

    Function used the special function from Supplementory Release for IF-97 Formulation.

  249. Temperature at saturation line [K]:

    wspTSHS(h, s)

    where:

    Function calculated saturation temperature on base of thermodunamic formulas. Newton method is used to determine the root.

  250. Properties calculation result in double-phase area (saturation temperature t [K], vapor fraction x []):

    wspTXSHS(h, s, *t, *x)

    where:

    Function calculated saturation temperature and vapor fraction on base of thermodunamic formulas. Newton method is used to determine the root.

    251. Double phase area

    Functions of properties in double-phase area.

  251. Specific volume in double-phase area [m3/kg]:

    wspVSTX(t, x)

    where:

    This function use the functions wspVSST and wspVSWT which return specific volumes of steam and water at saturation line. The function use next formula: Vx = (1 - X)·Vw + X·Vs, where Vs = wspVSST, Vw = wspVSWT and X - vapor fraction.

  252. Specific internal energy in double-phase area [J/kg]:

    wspUSTX(t, x)

    where:

    This function use the functions wspUSST and wspUSWT which return specific internal energies of steam and water at saturation line. The function use next formula: Ux = (1 - X)·Uw + X·Us, where Us = wspUSST, Uw = wspUSWT and X - vapor fraction.

  253. Specific entropy in double-phase area [J/(kg·K)]:

    wspSSTX(t, x)

    where:

    This function use the functions wspSSST and wspSSWT which return specific entropies of steam and water at saturation line. The function use next formula: Sx = (1 - X)·Sw + X·Ss, where Ss = wspSSST, Sw = wspSSWT and X - vapor fraction.

  254. Specific enthalpy in double-phase area [J/kg]:

    wspHSTX(t, x)

    where:

    This function use the functions wspHSST and wspHSWT which return specific enthalpies of steam and water at saturation line. The function use next formula: Hx = (1 - X)·Hw + X·Hs, where Hs = wspHSST, Hw = wspHSWT and X - vapor fraction.

  255. Specific isobaric heat capacity in double-phase area [J/(kg·K)]:

    wspCPSTX(t, x)

    where:

    This function use the functions wspCPSST and wspCPSWT which return specific heat capacities at constant pressure (Cp) of steam and water at saturation line. The function use next formula: CPx = (1 - X)·CPw + X·CPs, where CPs = wspCPSST, CPw = wspCPSWT and X - vapor fraction.

  256. Specific isochoric heat capacity in double-phase area [J/(kg·K)]:

    wspCVSTX(t, x)

    where:

    This function use the functions wspCVDPSST and wspCVDPSWT which return specific heat capacities at constant volume (Cv) of steam and water at saturation line in the double-phase region area. The function use next formula: CVx = (1 - X)·CVDPw + X·CVDPs, where CVDPs = wspCVDPSST, CVDPw = wspCVDPSWT and X - vapor fraction. Until version 5.6 this function use functions wspCVSST and wspCVSWT. This is not right from the point of view of thermodynamic, because don't consider the properties jump at saturation line. From version 5.6 used right formula.

  257. Sound velocity in double-phase area [m/sec]:

    wspWSTX(t, x)

    where:

    This function use the function wspKSTX for calculating sound velocity in double-phase area from the point of view of thermodynamic. But this function don't consider the flow structure. Until version 5.6 this function use next formula: Wx = (1 - X)·Ww + X·Ws, where Ws = wspWSST, Ww = wspWSWT and X - vapor fraction, this is not right from the point of view of thermodynamic. This is not right from the point of view of thermodynamic, because don't consider the properties jump at saturation line. From version 5.6 used right formula.

  258. Joule-Tompson coefficient in double-phase area [K/Pa]:

    wspJOULETHOMPSONSTX(t, x)

    where:

    Function calculated the propert Joule-Tompson coefficient in double-phase area with it's definition: JT = (dT/dP)h. Until version 5.6 this function use the functions wspJOULETHOMPSONSST and wspJOULETHOMPSONSWT and return value from next formula: JTx = (1 - X)·JOULETHOMPSONw + X·JOULETHOMPSONs, where JOULETHOMPSONs = wspJOULETHOMPSONSST, JOULETHOMPSONw = wspJOULETHOMPSONSWT and X - vapor fraction. This is not right from the definitions of Joule-Tompson. But now it is calculated proper.

  259. Thermal conductivity coefficient in double-phase area [W/(m·K)]:

    wspTHERMCONDSTX(t, x)

    where:

    This function use the functions wspTHERMCONDSST and wspTHERMCONDSWT which return Thermal conductivity coefficients of steam and water at saturation line. The function use next formula: THERMCONDx = (1 - X)·THERMCONDw + X·THERMCONDs, where THERMCONDs = wspTHERMCONDSST, THERMCONDw = wspTHERMCONDSWT and X - vapor fraction.

  260. Dynamic viscosity in double-phase area [Pa·sec]:

    wspDYNVISSTX(t, x)

    where:

    This function use the functions wspDYNVISSST and wspDYNVISSWT which return dynamic viscosities of steam and water at saturation line. The function use next formula: DYNVISx = (1 - X)·DYNVISw + X·DYNVISs, where DYNVISs = wspDYNVISSST, DYNVISw = wspDYNVISSWT and X - vapor fraction.

  261. Prandtl number in double-phase area []:

    wspPRANDTLESTX(t, x)

    where:

    This function use the functions wspPRANDTLESST and wspPRANDTLESWT which return Prandtl numbers of steam and water at saturation line. The function use next formula: PRANDTLEx = (1 - X)·PRANDTLEw + X·PRANDTLEs, where PRANDTLEs = wspPRANDTLESST, PRANDTLEw = wspPRANDTLESWT and X - vapor fraction.

  262. Kinematic viscosity in double-phase area [m2/sec]:

    wspKINVISSTX(t, x)

    where:

    This function use the functions wspKINVISSST and wspKINVISSWT which return kinematic viscosities of steam and water at saturation line. The function use next formula: KINVISx = (1 - X)·KINVISw + X·KINVISs, where KINVISs = wspKINVISSST, KINVISw = wspKINVISSWT and X - vapor fraction.

  263. Isoentropic exponent in double-phase area []:

    wspKSTX(t, x)

    where:

    Function return the value of isoentropic exponent in double-phase area with properties jump at saturation line. Until version 5.6 this function use next formula: Kx = (1 - X)·Kw + X·Ks, where Ks = wspKSST, Kw = wspKSWT and X - vapor fraction. But this is not right from the point of view of thermodynamic. Now it's calculated properly.

  264. Vapor fraction []:

    wspXSTV(t, v)

    where:

    This function use formula: X = (V - Vw)/(Vs - Vw), where Vw = wspVSWT, Vs = wspVSST.

  265. Vapor fraction []:

    wspXSTU(t, u)

    where:

    This function use formula: X = (U - Uw)/(Us - Uw), where Uw = wspUSWT, Us = wspUSST.

  266. Vapor fraction []:

    wspXSTS(t, s)

    where:

    This function use formula: X = (S - Sw)/(Ss - Sw), where Sw = wspSSWT, Ss = wspSSST.

  267. Vapor fraction []:

    wspXSTH(t, h)

    where:

    This function use formula: X = (H - Hw)/(Hs - Hw), where Hw = wspHSWT, Hs = wspHSST.

  268. Vapor fraction []:

    wspXSTCP(t, Cp)

    where:

    This function use formula: X = (CP - CPw)/(CPs - CPw), where CPw = wspCPSWT, CPs = wspCPSST.

  269. Vapor fraction []:

    wspXSTCV(t, Cv)

    where:

    This function use formula: X = (CV - CVDPw)/(CVDPs - CVDPw), where CVDPw = wspCVDPSWT, CVDPs = wspCVDPSST.

  270. Vapor fraction []:

    wspXSTW(t, w)

    where:

    From version 5.6 this function calculate value of sound velocity in double-phase region from isoentropic exponent, so it's proper from the point of view of thermodynamic. Until version 5.6 this function use formula: X = (W - Ww)/(Ws - Ww), where Ww = wspWSWT, Ws = wspWSST. The last is not right. Now calculated right value.

  271. Vapor fraction []:

    wspXSTJOULETHOMPSON(t, jt)

    where:

    This function use formula: X = (JOULETHOMPSON - JOULETHOMPSONw)/(JOULETHOMPSONs - JOULETHOMPSONw), where JOULETHOMPSONw = wspJOULETHOMPSONSWT, JOULETHOMPSONs = wspJOULETHOMPSONSST.

  272. Vapor fraction []:

    wspXSTTHERMCOND(t, tc)

    where:

    This function use formula: X = (TC - TCw)/(TCs - TCw), where TCw = wspTHERMCONDSWT, TCs = wspTHERMCONDSST.

  273. Vapor fraction []:

    wspXSTDYNVIS(t, dv)

    where:

    This function use formula: X = (DV - DVw)/(DVs - DVw), where DVw = wspDYNVISSWT, DVs = wspDYNVISSST.

  274. Vapor fraction []:

    wspXSTKINVIS(t, kv)

    where:

    This function use formula: X = (KV - KVw)/(KVs - KVw), where KVw = wspKINVISSWT, KVs = wspKINVISSST.

  275. Vapor fraction []:

    wspXSTPRANDTLE(t, pr)

    where:

    This function use formula: X = (PR - PRw)/(PRs - PRw), where PRw = wspPRANDTLESWT, PRs = wspPRANDTLESST.

  276. Vapor fraction []:

    wspXSTK(t, k)

    where:

    This function use formula: X = (K - Kw)/(Ks - Kw), where Kw = wspKSWT, Ks = wspKSST.

    277. Gases

    Functions for working with properties of gases and it's mixtures.

  277. Specific isobaric heat capacity [J/(kg·K)]:

    wspgCPIDT(id, t)

    where:

    Function calculate specific isobaric heat capacity of given gas in ideal state.

  278. Specific enthalpy [J/kg]:

    wspgHIDT(id, t)

    where:

    Function calculate specific enthalpy of given gas in ideal state based on integrating specific isobaric heat capacity.

  279. Specific entropy [J/(kg·K)]:

    wspgS0IDT(id, t)

    where:

    Function calculate specific entropy of given gas in ideal state based on integrating specific isobaric heat capacity, relative to temperature.

  280. Molar mass [kg/mole]:

    wspgMMID(id)

    where:

    Function simply calculate molar mass of given gas/mixture.

  281. Specific entropy [J/(kg·K)]:

    wspgSIDPT(id, p, t)

    where:

    Function calculate specific entropy of given gas in ideal state based on integrating specific isobaric heat capacity, relative to temperature.

  282. New mixture identificator (id):

    wspgNEWMIX()

    Function return identificator of new mixture. This value can be used in functions when you will add components to this mixture.

    Note: Function result have type "long".

    Note: In Mathcad function have one parameter which value is not used.

  283. Addition of gas to mixture:

    wspgADDGASM2MIX(mix_id, gas_id, mass)

    where:

    Function allow to add some mass portion of existing gas to mixture. Gas identificator must be received by function wspgNEWMIX().

    Note: Function result have type "long".

  284. Addition of gas to mixture:

    wspgADDGASMO2MIX(mix_id, gas_id, moles)

    where:

    Function allow to add some portion of existing gas in moles to mixture. Gas identificator must be received by function wspgNEWMIX().

    Note: Function result have type "long".

  285. Identificator (id) of new gas from mixture:

    wspgNEWGASFROMMIX(mix_id)

    where:

    Function must be called when all components of mixture is given. And this function return identificator of gase which can be used in functions wspgCPIDT(id, t), wspgHIDT(id, t) etc. After call to this function the existing mixture is not deleted.

    Note: Function result have type "long".

  286. Removal of existing gas:

    wspgDELETEGAS(id)

    where:

    Function free memory for gas (given by gas identificator). Identificator can be only those whom received by function wspgNEWGASFROMMIX(mix_id). You can't free memory for built-in gas. After call to this function all next call to functions wspgCPIDT(id, t), wspgHIDT(id, t) and so on will raise an error.

  287. Removal of existing mixture:

    wspgDELETEMIX(id)

    where:

    Function free memory for given mixture (given by identificator). Identificator must be value received by function wspgNEWMIX(). When calling to this function the gases, calculated from given mixture (by function wspgNEWGASFROMMIX(mix_id)) is not deleted.

  288. Removal of all user-added gases:

    wspgDELETEALLGASES()

    Function free memory for all user-defined gases.

    Note: In Mathcad function have one parameter which value is not used.

  289. Removal of all mixtures:

    wspgDELETEALLMIX()

    Function free memory for all mixtures.

    Note: In Mathcad function have one parameter which value is not used.

  290. Gases count:

    wspgGETGASESCOUNT()

    Return sum of built-in and user-defined gases.

    Note: Function result have type "long".

    Note: In Mathcad function have one parameter which value is not used.

  291. Mixtures count:

    wspgGETMIXCOUNT()

    Return mixtures count defined by user.

    Note: Function result have type "long".

    Note: In Mathcad function have one parameter which value is not used.

    292. System

    System functions.

  292. Set and return relative precision in the WaterSteamPro functions []:

    wspSETTOLERANCE(tolerance)

    where:

    Used in functions which requires the relative precision.

  293. Relative precision in the WaterSteamPro functions []:

    wspGETTOLERANCE()

    Used in functions which requires the relative precision.

    Note: In Mathcad function have one parameter which value is not used.

  294. Set and return a mode of management of make function results more precise:

    wspSETTOLERANCEMODE(mode)

    where:

    Used in functions where the function result can be maked more precise (function with arguments p, h and p, s). If argument equal to zero the management of tolerance disabled and the speed of functions is increased while the tolerance is decreased.

    Note: Function result have type "long".

  295. Mode of management of make function results more precise:

    wspGETTOLERANCEMODE()

    Used in functions where the function result can be maked more precise (function with arguments p, h and p, s). If argument equal to zero the management of tolerance disabled and the speed of functions is increased while the tolerance is decreased.

    Note: Function result have type "long".

    Note: In Mathcad function have one parameter which value is not used.

  296. Set and return a mode of checking the range of functions arguments:

    wspSETCHECKRANGEMODE(mode)

    where:

    Used in functions before calculating. If argument mode equal to zero the checking is disabled and the speed of functions is increased but may occur errors and the result may be wrong.

    Note: Function result have type "long".

  297. Mode of checking the range of functions arguments:

    wspGETCHECKRANGEMODE()

    Return zero if the checking is disabled.

    Note: Function result have type "long".

    Note: In Mathcad function have one parameter which value is not used.

  298. Set and return a last error code:

    wspSETLASTERROR(ErrCode)

    where:

    This function can be used for estimation of quantity of errors since all error codes are enumerated starting with zero (no error) and subsequently in increasing order. In the case of a range overrun the function returns (and sets) zero value - that means no error.

    Note: Function result have type "long".

  299. Last error code:

    wspGETLASTERROR()

    Return last error occurred in any functions except system functions. Any function call (except system) set the error code to zero (no error).

    Note: Function result have type "long".

    Note: In Mathcad function have one parameter which value is not used.

  300. Last error description:

    wspGETLASTERRORDESCRIPTION()

    Return last error description occurred in any function call except system functions. The result of function define in library OKAWSP6.DLL as LPCSTR (ANSI-symbols), but in ActiveX-object WSP.WSPCalculator - as BSTR (Unicode). So in Visual Basic you must use the ActiveX-version of function. If you are using non Active-X component then you must don't care about freeing memory because this function use the static buffer for return values and it's fill this buffer appropriate value when calling.

    Note: Function result have type "string".

    Note: In Mathcad function have one parameter which value is not used.

  301. Last error description:

    wspGETLASTERRORDESCRIPTIONW()

    Return last error description occurred in any function call except system functions.

    Note: Function result have type "unicodestring".

    Note: In Mathcad function have one parameter which value is not used.

  302. Process related registration of the WaterSteamPro:

    wspLOCALREGISTRATION(name, key)

    where:

    Used in "Developer" license of the WaterSteamPro. This function is obsolete and do nothing from the version 6.0 of the WaterSteamPro.

    Note: Function result have type "void".

    Note: This function is obsolete and it is recommended don't use it.

  303. Process related registration of the WaterSteamPro:

    wspLOCALREGISTRATIONEXA(name, data)

    where:

    Used in "Developer" license of the WaterSteamPro.

  304. Process related registration of the WaterSteamPro:

    wspLOCALREGISTRATIONEXW(name, data)

    where:

    Used in "Developer" license of the WaterSteamPro.

  305. Set and return maximum difference between saturation temperature and input temperature for function wspWATERSTATEAREA [K]:

    wspSETDELTATS(delta)

    where:

    Function is obsolete. From version 6.0 it is not used!

    Note: This function is obsolete and it is recommended don't use it.

  306. Maximum difference between saturation temperature and input temperature for function wspWATERSTATEAREA [K]:

    wspGETDELTATS()

    Function is obsolete. From version 6.0 it is not used!

    Note: In Mathcad function have one parameter which value is not used.

    Note: This function is obsolete and it is recommended don't use it.

  307. Set and return maximum iteration's count for Newton method:

    wspSETMAXITERATION(maxiteration)

    where:

    This number used when the Newton method used. If number of iterations more than this value the error WSP_CANT_FIND_ROOT (3) occur.

    Note: Function result have type "long".

  308. Maximum iteration's count for Newton method:

    wspGETMAXITERATION()

    This number used when the Newton method used. If number of iterations more than this value the error WSP_CANT_FIND_ROOT (3) occur.

    Note: Function result have type "long".

    Note: In Mathcad function have one parameter which value is not used.

  309. Set and return maximum difference between pressure values at estimation of the area 3 parameters [Pa]:

    wspSETDELTAPRESSURE(delta)

    where:

    Function is obsolete. From version 6.0 it is not used!

    Note: This function is obsolete and it is recommended don't use it.

  310. Maximum difference between pressure values at estimation of the area 3 parameters [Pa]:

    wspGETDELTAPRESSURE()

    Function is obsolete. From version 6.0 it is not used!

    Note: In Mathcad function have one parameter which value is not used.

    Note: This function is obsolete and it is recommended don't use it.

  311. Set and return initial value for water in area 3 [kg/m3]:

    wspSETINITWATERDENSITY(r)

    where:

    Function is obsolete. From version 6.0 it is not used!

    Note: This function is obsolete and it is recommended don't use it.

  312. Initial value for water in area 3 [kg/m3]:

    wspGETINITWATERDENSITY()

    Function is obsolete. From version 6.0 it is not used!

    Note: In Mathcad function have one parameter which value is not used.

    Note: This function is obsolete and it is recommended don't use it.

  313. Set and return the initial value for steam in area 3 [kg/m3]:

    wspSETINITSTEAMDENSITY(r)

    where:

    Function is obsolete. From version 6.0 it is not used!

    Note: This function is obsolete and it is recommended don't use it.

  314. Initial value for steam in area 3 [kg/m3]:

    wspGETINITSTEAMDENSITY()

    Function is obsolete. From version 6.0 it is not used!

    Note: In Mathcad function have one parameter which value is not used.

    Note: This function is obsolete and it is recommended don't use it.

  315. Internal version of the WaterSteamPro:

    wspGETWSPVERSION()

    The format of version is x.yzzz where x - major version, y - minor version, zzz - revision.

    Note: In Mathcad function have one parameter which value is not used.