Numerical analysis of a two-phase injection refrigeration cycle using R32
1Former M. Tech Student, Amrita Vishwa Vidyapeetham, Bengaluru, 560035, India
2School of Mechanical Engineering, Kalinga Institute of Industrial Technology, Bhubaneswar, 751024, India
J Ther Eng 2022; 8(2): 157-168 DOI: 10.18186/thermal.1077857
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Abstract

The present paper reports the performance of a popular refrigerant R32 (Difluoromethane, CF2H2) experiencing the two phase injection process. Two phase injection process may lower the discharge temperature of a multistage compressor. In order to investigate the role and impact of two-phase injection on a compressor, a Scroll compressor is selected because scroll compressor has high tolerance for liquid refrigerant. A reputed compressor is chosen where all the operating conditions and specifications are available in public domain. The modelling and analysis of refrigeration system is carried out using a simple MATLAB code. Around 200 iterations were performed for four different condensing and evaporating temperatures. The maximum reduction in discharge temperature is found to be 44℃ when compared to R410A used in the same system.