二甲醚专用状态方程的研究  

A HELMHOLTZ EQUATION OF STATE FOR DIMETHYL ETHER

作　　者：吴江涛[1] 周永[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《工程热物理学报》2009年第12期1999-2002,共4页Journal of Engineering Thermophysics

基　　金：全国优秀博士论文作者专项资金(No.200540);教育部新世纪优秀人才支持计划(No.NCET-05-0836)

摘　　要：在对二甲醚实验数据进行文献调研的基础上,运用生物进化优化算法开发了二甲醚的饱和蒸汽压、饱和液密度及饱和汽密度方程和Helmholtz状态方程。其中二甲醚的饱和蒸汽压、饱和液密度和饱和汽密度方程的平均绝对偏差分别为0.50%、0.38%和0.55%。新的Helmholtz状态方程计算密度的偏差在液相区为0.1%以内,临界点附近为1%,可以很好地用于工程计算。In this work, the vapor pressure equation, saturated liquid density equation, saturated vapor density equation and Helmholtz equation of state for dimethyl ether are developed by genetic optimization algorithm combined with a weighted least-square fit of selected experimental data based on extensive collection of DME＇s experimental data. The average absolute deviation of vapor pressure equation, saturated liquid density equation and saturated vapor density equation is 0.50%, 0.38% and 0.55%, respectively. The uncertainty in density of the equation of state ranges from 0.1% in the liquid to 1% near the critical point.

关 键 词：二甲醚 Helmholtz状态方程 辅助方程 临界点 

分 类 号：TK123[动力工程及工程热物理—工程热物理] O551.3[动力工程及工程热物理—热能工程]