基于比容平移理论的标准氢PR状态方程  

Volume translated Peng-Robinson equation of state for normal hydrogen

作　　者：刘周斌 田梁玉 杨焘 刘俊 陈卓 沈俊 LIU Zhou-bin;TIAN Liang-yu;YANG Tao;LIU Jun;CHEN Zhuo;SHEN Jun(Mass Entrepreneurship and Innovation Center,State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310051,Zhejiang Province,China;School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]国网浙江省电力有限公司双创中心,浙江杭州310051 [2]北京理工大学机械与车辆学院,北京100081

出　　处：《化学工程》2023年第2期51-56,共6页Chemical Engineering(China)

基　　金：国网浙江省电力有限公司科技项目(B311JZ20001)。

摘　　要：全面准确的热物性数据是氢能研究和深入应用的基础,为提高传统立方型状态方程预测精度的不足,文中选用比容平移理论对Peng-Robinson状态方程的液相比容进行合理修正,通过提出新型比容平移关联式有效地改善了标准氢饱和液相区和超临界区的密度预测精度。计算结果表明:文中所提出体积平移的Peng-Robinson方程与多参数亥姆霍兹状态方程计算精度相当,方程的适用范围为三相点至1 000 K、压力低于100 MPa的区域,并且可合理外推至300 MPa高压区域,计算精度可以满足实际工程应用的需要。Comprehensive and accurate thermophysical properties of normal hydrogen are the basis for research and in-depth application of hydrogen energy. In order to improve the prediction accuracy of the traditional cubic equation of state(EoS), the volume translation theory coupled with the Peng-Robinson EoS was applied to improve the saturated liquid phase and supercritical fluid density. The volume-translated Peng-Robinson(VTPR) equation proposed is comparable to the multiparameter Helmholtz EoS. The application range of the model is from the triple point temperature to 1 000 K, and the pressure is lower than 100 MPa. This VTPR model has a certain degree of extrapolation for the direction of high temperature and pressure. Calculation accuracy can meet the needs of practical engineering applications.

关 键 词：PR状态方程 比容平移 标准氢 热力学性质 

分 类 号：TK123[动力工程及工程热物理—工程热物理]