Title: Calculation method of R1234yf phase equilibrium curve within temperature range from 122.6 K to 367.85 K
Abstract: A new calculation method is considered for calculating pressure ps and density ρ− of saturated steam, density ρ+ of saturated liquid and of the heat of vaporization r within the temperature range from Tt to Tc, where Tt is the triple-point temperature, Tc is the critical temperature. A specific feature of the method is the ability to predict the ps, ρ−, ρ+ values even in the absence of experimental data on the particular properties in the vicinity of the triple point. The method has been tested on the example of computation for the R1234yf refrigerant within the temperature range of 122.6≤T≤367.85 K. For this purpose, for R1234yf, on the basis of the modified Clapeyron-Clausius equation ρ−=Tps′(T)/r*(T) and the perfect gas law, a set of mutually agreed equations including equations ps = ps(T), ρ− = ρ−(T), ρ+ = ρ+(T) and r*(T) = r(T)/(1−ρ−/ρ+) has been developed. In addition to the above, in the vicinity of the critical point, the mean diameter of the saturation curve satisfies the Yang-Yang model. Within the temperature range from Tt = 122.6 К to Tc = 367.85 К, the thermodynamic tables for R1234yf have been calculated including for the values of ps, ρ−, ρ+, r and r*.
Publication Year: 2020
Publication Date: 2020-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 7
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