基于CPA状态方程计算水蒸汽的热力学物性  

Research thermodynamic properties of water based on the CPA EOS

作　　者：曾志勇[1] 彭万峰[1] 余伟俊[1] 李小森[1] 

机构地区：[1]中国科学院广州能源研究所,广东广州510640

出　　处：《计算机与应用化学》2013年第2期147-150,共4页Computers and Applied Chemistry

基　　金：广东省博士启动基金(10451007006006174);中科院广州能源研究所所博士启动基金

摘　　要：水和水蒸气的热力学性质是工程中重要的基础数据,获得可靠的计算途径对于工程设计具有重要的意义。本文利用CPA方程研究了水和水蒸气热力学性质的计算,建立了基于CPA方程的热力学性质计算模型,主要研究了水的饱和状态、水和水蒸气的PVT性质以及焓值计算。通过考察研究发现,在(0～22)bar范围内,CPA方程计算的水的热力学性质与其实验数据具有良好的一致性,所计算的数据与实验数据的平均相对偏差小于1%,最大偏差不超过5%,满足工程计算的精度需要,证实了CPA方程适用于工程中水和水蒸气的热力学性质计算。The thermodynamic properties of water are the basic data in engineering design, so it is important to find a reliable computing method for them. In this work, the Cubic plus Association （CPA） equation of state （EOS） is used to build the computing model for studying the thermodynamic properties of water, including the saturated situation, the PVT properties and the enthalpy of water. Based on the research, it could be found that the calculated thermodynamic properties by CPA EOS are consistent with the experimental data in the pressure range of （0 - 22） bar, and the average absolute percent deviations are less than l%, the maximum absolute percent deviation is less than 5%, which is suitable for the engineering computing. Therefore, this work has confirmed that the CPA EOS is a reliable model for the computing the thermodynamic properties of water.

关 键 词：CPA方程 热力学性质 PVT性质 焓 饱和条件 

分 类 号：O642.1[理学—物理化学]