A fundamental equation of state for cis-1,3,3,3-tetrafluoropropene (R-1234ze(Z))
A fundamental equation of state for cis-1,3,3,3-tetrafluoropropene (R-1234ze(Z))
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DOI：
10.1016/j.ijrefrig.2013.12.018
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发表时间：
2014-08
期刊：
影响因子：
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通讯作者：
R. Akasaka;Y. Higashi;A. Miyara;S. Koyama
中科院分区：
文献类型：
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作者：
R. Akasaka;Y. Higashi;A. Miyara;S. Koyama
提出了顺式-1，3，3，3-四氟丙烯(R-1234ze(Z))的基本状态方程。物态方程用亥姆霍兹能量表示，独立变量为温度和密度。该状态方程基于临界参数、蒸汽压、液体和气相的密度以及气相中的声速的实验数据。所有热力学性质都可以作为亥姆霍兹能量的导数导出。该方程适用于273℃至430℃的温度和高达6兆帕的压力。由该方程计算出的物性的估计不确定度为：蒸汽压0.15%，蒸汽密度0.4%，液体密度0.2%，汽相声速0.05%。该方程在远离实验数据的区域内表现出合理的外推行为。
A fundamental equation of state is presented for cis-1,3,3,3-tetrafluoropropene (R-1234ze(Z)). The equation of state is expressed explicitly in the Helmholtz energy with independent variables of temperature and density. The equation of state is based on experimental data for the critical parameters, vapor pressures, densities of the liquid and vapor phases, and sound speeds in the vapor phase. All thermodynamic properties can be derived as derivatives of the Helmholtz energy. The equation is valid for temperatures from 273 K to 430 K and for pressures up to 6 MPa. The estimated uncertainties of properties calculated from the equation are 0.15% in vapor pressures, 0.4% in vapor densities, 0.2% in liquid densities, and 0.05% in the vapor phase sound speeds. The equation exhibits reasonable extrapolation behavior in regions away from the experimental data.