水和水蒸汽热力学物性参数及导数的计算与应用

本文针对现代换热设备设计、两相流动与传热研究的需要,介绍了可供科研使用的水和水蒸汽物性计算方法,完善了计算程序。根据超临界锅炉设计中的超临界水的物性计算,两相流研究和换热设备动态特性研究中对物性导数计算的需要,提供了两个算例,并进行了定性分析。

The Calculation and Application of Thermodynamic Properties and Derivatives for Water and Steam

Water and steam are widely used in industry. The accurate and convenient calculation of the thermodynamic properties is important. The formulations for general and scientific use of water and steam are introduced. A computer program for calculations is perfected and developed, which includes 10 subroutines, 11 internal functions, and can be used to calculate properties for internal energy u, enthalpy h entropy s, specific heat capacity Cv and Cp, speed of sound, dynamic viscosity, thermal conductivity, static dielectric constant and surface tension and the derivatives for (?)p/(?)p,(?)p/(?)T and (?)v/(?)t.Accroding to the application of the design of supercritical pressure boiler and the study of two-phase flow and heat transfer two examples are given and some details are discussed.