摘要
本文提出了新的饱和蒸气密度的通用对比态推算式,并分别以标准沸点下的蒸发潜热和临界温度与标准沸点温度之差为基准,对蒸发潜热和温度无量纲化导出了工质蒸发潜热通用对比态方程,结合饱和液体焓通用对比态方程导出了饱和蒸气焓通用对比态方程,揭示出饱和蒸气焓通用对比态方程为双变量函数,除有温度变量外还包含有表示物质差异的变量。对多种物质的文献值计算比较,以上方程的总的平均绝对偏差分别为0.43％、0.87％和O.35％。
A new corresponding equation of saturated gas densities is developed in this paper. Enthalpy of vaporization and temperature are transformed to dimensionless parameters on the basis of the enthalpy of vaporization at normal boiling point and the temperature difference between critical temperature and normal boiling temperature respectively, and the generalized corresponding equation of enthalpy of vaporization and saturated gas enthalpy are developed in this paper. The equation of saturated gas enthalpy is a bivariate function with temperature and P which express the difference of substances. The calculated values have been checked by recommend data in references, the average absolute deviations are 0.43%, 0.87% and 0.35% respectively.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2003年第2期198-201,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.59976040)
教育部博士点专项基金资助项目(No.98035825)
