期刊
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
卷 44, 期 -, 页码 168-176出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2013.12.018
关键词
Density; Equation of state; Heat pump; R-1234ze(Z); Vapor pressure
资金
- New Energy and Industrial Technology Development Organization (NEDO)
- Grants-in-Aid for Scientific Research [24560240] Funding Source: KAKEN
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. (C) 2014 Elsevier Ltd and IIR. All rights reserved.
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