Abstract
Heat pumps consist mainly of compressors, evaporators, condensers and expansion valves, and change the flow of refrigerant to allow cooling or heating in a single unit. The expansion valve used in the heat pump is mainly used with the electronic expansion valve for the conventional manufactured cooler, which flows in a single direction, requiring a separate bypass line and check valve, thereby reducing the performance of the freezer. Therefore, in this study, the cooling performance according to the opening step was analyzed using a interactive expansion valve for R-404A, which does not require a bypass line and a check valve during the design of the heat pump. The cooling performance coefficient for R-404A was 3.633 for thermostatic expansion valve, 3.795 for conventional electronic expansion valves and 3.851 for interactive electronic expansion valves. This is an improvement of 6.001% compared to the temperature formula and 1.476% over the conventional electronic system.
Published Version
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