An equation of state for the thermodynamic properties of 1,1,1,3,3,3-hexafluoropropane (HFC-236fa)

被引：20
|
作者：
Pan, Jiang [1 ]
Rui, Xinfang [2 ]
Zhao, Xiaodong [1 ]
Qiu, Liming [3 ]
机构：
[1] China Jiliang Univ, Inst Thermal Engn, Hangzhou 310018, Zhejiang, Peoples R China
[2] China Jiliang Univ, Ctr Engn Training, Hangzhou 310018, Zhejiang, Peoples R China
[3] Zhejiang Univ, Inst Refrigerat & Cryogen, Hangzhou 310027, Zhejiang, Peoples R China
来源：
FLUID PHASE EQUILIBRIA | 2012年 / 321卷
基金：
中国国家自然科学基金;
关键词：
1,1,1,3,3,3-Hexafluoropropane; Equation of state; Helmholtz free energy; HFC-236fa; VAPOR-LIQUID-EQUILIBRIUM; HALOGENATED HYDROCARBONS; T MEASUREMENTS; PRESSURE; TEMPERATURE; PROPANE; FLUIDS;
D O I：
10.1016/j.fluid.2012.02.012
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
1,1,1,3,3,3-Hexafluoropropane (HFC-236fa) is widely used in industrial fields as an alternative for chlorofluorocarbons and hydrochlorofluorocarbons. In this paper, a new equation of state expressed explicitly in the Helmholtz energy with temperature and density as independent variables was developed. The equation of state is valid from 179.6 K to 400 K with pressures up to 70 MPa. The results from the equation of state were compared with the available experimental data. The uncertainties in density of the equation of state are estimated to be 0.1% in the compressed liquid region, and 0.5% in the vapor region. The uncertainties in vapor pressure are 0.2% at temperatures from 280 K to 380 K, and 0.4% at temperatures above 380 K. The uncertainty in speed of sound in the gas region is 0.1%. The extrapolation behavior of the equation of state is reasonable within the valid range and at higher pressures and temperatures. (C) 2012 Elsevier B.V. All rights reserved.
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页码：10 / 16
页数：7
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