二氧化碳热物性方程研究进展及应用

Research progress and applications of thermophysical equations of carbon dioxide

精准的二氧化碳热物理性质(热物性)数据对于超临界二氧化碳发电系统设备的仿真设计、加工制造、性能测试以及运行优化等具有重要意义。本文综述了适用于二氧化碳的典型状态方程、导热系数方程和黏度方程的基本原理及其研究进展,对不同类型方程的计算精度进行了综合比较并给出了推荐使用方案。列举了多种可用于工程应用的二氧化碳热物性计算软件或程序,重点介绍了REFPROP软件计算二氧化碳热物性的模型。最后,对二氧化碳热物性计算的发展趋势进行了展望。

Accurate thermophysical data for carbon dioxide is of great significance to simulation design,manufacturing,performance test and operation optimization equipment for supercritical carbon dioxide power generation systems.In this paper,the basic principle and research progress of typical state equations,thermal conductivity equations and viscosity equations suitable for carbon dioxide are reviewed,and the calculation accuracy of different types of equations is compared and the recommended scheme is given.Moreover,a variety of software or programs for calculating the thermophysical properties of CO_(2) in engineering are listed,and the models in REFPROP software are highlighted.In addition,the development trend of calculation for CO_(2) thermophysical property is prospected.