摘要
本文根据混合工质假临界温度的推算式,推导出利用各组分等对比态温度的饱和蒸气压计算混合工质的蒸气压的新方程。推算式中的两个与混合物组成及温度有关的系数,可用非临界区用两点文献值标定．用R401系、R404A和 R407系的三元混合工质的文献值与计算值做了比较,泡点压力和露点压力的推算值的绝对偏差平均值小于1．5％。
According to the equation of pseudo critical temperature of mixtures, the new equations for prediction of saturated vapor pressure of non-azeotropic mixtures were proposed, which can be calculated by the saturated vapor pressures of pure components at the same corresponding temperature. The two coefficients of the prediction equations can be determined by two known values at the temperatures lower than critical temperature. The calculated results were compared with the literature＇s values of R401 series, R404A and R407 series. The average absolute deviations is less than 1.5%.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2006年第3期388-390,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50336020)
关键词
混合物
临界区
饱和蒸气压
推算
mixtures
critical region
saturated pressure
predication
