Author(s): LIU Hui, WANG Yu-kai
Pages: 67-69
Year: 2015 Issue:  23
Journal: Guangzhou Chemical Industry
Keyword:  thermodynamic properties; cubic equations of state;
Abstract: The accuracy of saturated steam and liquid volume calculations for R134a were compared, which was used by four general cubic equations of state:the SRK equation, the PR equation, the Tong Jingshan equation and the Su Zhijun equation.Calculations showed that in the range of -50 ~90 ℃, the Tong Jingshan equation had the least calculation error, average deviation of saturated gas volume and liquid volume calculation values and literature values were 1.63%and 4.12%, average deviation of the PR equation's calculation values and literature values were 1.90% and 4.76%, average deviation of the SRK equation had the largest error, it's calculation values and literature values were 3.35%and 18.64%, average deviation of the Su Zhijun equation was basically the same as the PR equation, it's calculation values and literature values were 2.00% and 5.21%.The results showed that for R134a, the calculation of Tong Jingshan equation was more accurate, and it was more suitable for engineering calculations for R134a's Thermodynamic properties.