适用于整个区域的HFC-227ea状态方程  

A NEW EQUATION OF STATE FOR HFC-227ea OVER ENTIRE REGION

作　　者：段远源[1] 徐建锋[1] 

机构地区：[1]清华大学热能工程系,北京100084

出　　处：《工程热物理学报》2003年第1期22-24,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.59906006);高等学校全国优秀博士学位论文作者专项资金资助项目(No.200032)

摘　　要：基于现有的pvT和导出性质实验数据,拟合了一个HFC-227ea的35项专用状态方程。本方程适用于HFC-227ea压力从零至65MPa,密度从零至1730 kg.m_-3,温度从204至423 K整个流体区域的热力学性质计算。通过与实验结果比较,检验了对HFC-227ea各种热力学性质的计算精度,包括pvT性质、比定压热容、声速、焦汤系数、饱和蒸气压等,结果表明本方程具有很高的精度。A 35-coefficient equation of state for HFC-227ea has been developed, based on the updated available measurements of pvT and derived properties. The equation of state is effective at pressures up to 65 MPa, densities up to 1730 kg.m-3, and temperatures from 204 to 423 K, respectively. Comparisons of various thermodynamic properties of HFC- 227ea, such as pvT, isobaric heat capacity, speed of sound, Joule-Thomson coefficient, vapor pressure, between experimental data and calculated values of the equation of state are also presented. The results show that the equation of state has a very good precision for representing thermodynamic properties of HFC-227ea.

关 键 词：HFC-227EA 状态方程 热力学性质 制冷剂 1 1 2 3 3 -七氟丙烷 声速 比定压热容 焦汤系数 

分 类 号：TB612[一般工业技术—制冷工程]