0 ℃ 以下饱和水蒸汽压计算方法的比较

Comparison of calculation methods for saturated water vapor pressure below 0 ℃

饱和水蒸汽压是冷却塔热力计算的基础参数之一,国内普遍采用的纪利公式不适于计算低温(小于0℃)条件下的饱和水蒸汽压。通过对多种计算公式的系统比较和分析,推荐了一种具有高准确度的计算公式(IAPWS R14-08(2011)公式),弥补了纪利公式的不足,为提高冷却塔热力计算的准确性奠定基础。

Saturated water vapor pressure is a basic parameter for cooling tower thermodynamic calculation,however,the Gilley-formula commonly used in China is not suitable for calculating the saturated water vapor pressure at low temperature(below 0℃).Several calculation formulas were systematically compared and analyzed,and a calculation formula with high accuracy(IAPWS R14-08(2011))was recommended,which makes up for the deficiency of Gilley formula and lays a foundation for improving the accuracy of cooling tower thermodynamic calculation.