Agreement between the values of thermodynamic properties at the borders of IF-97 regions

Table 1 shows discrepancy of the values of thermodynamic properties calculated on the basic equations for bordering one-phase regions. Table 2 shows discrepancy of pressure, temperature and Gibbs energy at saturation line with separated point at T = 623,15 K where equations for three regions are agreed.

Table # 1. Discrepancy of the values of thermodynamic properties at the borders of IF-97 regions

Quantity, x Border of regions # 1, 3 Border of regions # 2, 3 Border of regions # 2, 5
|Δx|max σ*1 |Δx|max σ |Δx|max σ
υ, % 0,004 0,002 0,018 0,007 0,002 0,001
h, kJ/kg 0,031 0,014 0,134 0,073 0,020 0,012
ÑÐ, % 0,195 0,058 0,353 0,169 0,081 0,048
s, J/(kg·K) 0,042 0,022 0,177 0,094 0,042 0,025
g, kJ/kg 0,005 0,005 0,005 0,003 0,026 0,021
w, % 0,299 0,087 0,403 0,073 0,021 0,009

Table # 2. Discrepancy of the values of thermodynamic properties at the saturation line

Quantity, x T1 ≤ T ≤ 623.15 K 623.15 K ≤ T ≤ Tcritical T = 623,15 K
|Δx|max σ*2 |Δx|max σ
PS, % 0,0069 0,0033 0,0026 0,0015 0,0041
TS, % 0,0006 0,0003 0,0003 0,0002 0,0006
g, kJ/kg 0,012 0,006 0,002 0,001 0,005

 

*1 Mean square deviation σ is calculated for 3000 points allocated uniformly along two parts of saturation line

*2 Mean square deviation σ is calculated for 3000 points allocated uniformly along two parts of saturation line