Affiliation:
1. Department of Mechanical Engineering, Faculty of Engineering, Kyushu Sangyo University, 2-3-1 Matsukadai, Fukuoka 813-8503, Japan
Abstract
Vapor–liquid equilibrium (VLE) have been successfully modeled for the binary mixtures of difluoromethane (HFC-32) + isobutane and difluoromethane + trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)). These mixtures are considered as possible replacements for conventional refrigerants far from negligible global warming potential (GWP). A multifluid approach explicit in the Helmholtz free energy forms the basis of the model. The independent variables are the temperature, density, and composition. Accurate published equations of state for pure HFC-32, isobutane, and HFO-1234ze(E) are incorporated to calculate the Helmholtz free energy of each component. Typical uncertainties of bubble- and dew-point pressures calculated using the model are within 2%. Although adjustable parameters of the model are determined only from experimental VLE data, it is highly probable that the model reasonably predicts other thermodynamic properties such as enthalpy and heat capacities. Therefore, the model allows practical design and simulation of refrigeration systems using the mixtures as a working fluid.
Publisher
Springer Science and Business Media LLC
Subject
Fluid Flow and Transfer Processes,Renewable Energy, Sustainability and the Environment,Control and Systems Engineering
Cited by
12 articles.
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1. Research on the thermodynamic properties of binary mixtures containing R1234ze(E) based on Helmholtz model;Fluid Phase Equilibria;2023-10
2. Experimental investigation on vapor-liquid equilibrium for 1,1-difluoroethane(R152a) +trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) binary systems;The Journal of Chemical Thermodynamics;2022-12
3. Bubble point pressures of binary mixtures of ethanol with propane, dimethyl ether or trans-1,3,3,3-tetrafluoropropene and correlation with equations of state and Wong-Sandler mixing rules;Fluid Phase Equilibria;2020-11
4. Thermodynamic properties of hydrofluoroolefin (R1234yf and R1234ze(E)) refrigerant mixtures: Density, vapour-liquid equilibrium, and heat capacity data and modelling;International Journal of Refrigeration;2019-02
5. Life cycle climate performance evaluation (LCCP) on cooling and heating systems in South Korea;Applied Thermal Engineering;2017-06