石油化工用换热器传热计算大量涉及烃类及其混合物物性数据的计算。使用的参数,可供选择的计算公式广泛而且繁杂,如何正确地进行烃类及其混合物的密度计算,是传热计算中的基本问题。尤其在其它物性(如粘度、导热系数、炝、熵等)计算公式中,涉及到密度的情况下,能否正确确定密度值,就成为传热计算的关健。本文论述了烃类及其混合物密度计算的方法、程序,并对不同方法计算结果进行了比较。 Heat exchanger for petrochemical calculation of a large number of physical properties involving hydrocarbons and their mixtures. The parameters used and the formulas available for selection are extensive and complicated. How to correctly calculate the density of hydrocarbons and their mixtures is a basic problem in heat transfer calculation. Especially in other properties (such as viscosity, thermal conductivity, 炝, entropy, etc.) formula, involving the case of density, the ability to correctly determine the density value, heat transfer has become the key. This paper discusses the methods and procedures for the density calculation of hydrocarbons and their mixtures, and compares the results of different methods.