Abstract
The objective of this study is to decrease the refrigerant temperature at the compressor outlet under high thermal load conditions with low-GWP refrigerants in the showcase vapor compression cycle. When the outside temperature increases, the showcase cycle suffers a reliability problem due to the high discharge temperature. Liquid injection is a good method for decreasing the discharge temperature of the refrigeration cycle. This study presents the development of a simplified simulation model for predicting the performance of a liquid injection showcase cycle. The optimum injection pressures of the showcase cycle with R410A and R32 were presented. In addition, after the quasi-saturation compression cycle was reached through the multi-stage liquid injection control, the effect of reducing the discharge temperature was analyzed. Finally, the optimal number of injections for each of the refrigerant and operating conditions was presented.
Published Version
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