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http://dx.doi.org/10.5762/KAIS.2021.22.1.31

Simulation on the performance of an automobile climate control system with Internal heat exchanger and TXV  

Park, Cha-Sik (Division of Mechanical and Automotive Engineering, Hoseo University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.22, no.1, 2021 , pp. 31-36 More about this Journal
Abstract
Recently, automobile air conditioning systems have applied an alternative refrigerant that can replace the high GWP refrigerant R134a due to the global warming problem. This study simulated the performance of an automobile climate control system with an internal heat exchanger and TXV. Refrigerant R1234yf was applied as the working fluid. Amesim, a commercial software program, was used to model the main components of the compressor, condenser, TXV, evaporator, and internal heat exchanger. As the outside temperature increased from 30℃ to 40℃, the cooling capacity of the system decreased by 3.1%, and the power consumption of the compressor increased by 17.1%. In addition, The performance characteristics of the refrigeration cycle were simulated by increasing the fin pitch of the condenser from 0.8 mm to 1.4 mm. When the fin pitch was larger than 1.0 mm, the condenser capacity decreased, and the system COP was lowered by 5.9%. When the fin pitch of the condenser was 0.8 mm, which was smaller than 1.0 mm, there was no significant change in the system performance. Hence, the optimal performance was observed at a fin pitch of 1.0 mm.
Keywords
Alternative Refrigerants; Condenser; Internal Heat Exchanger; R1234yf; Thermal Expansion Valve;
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