Experimental study on the optimal charging amount of refrigeration system for refrigerated trucks
To respond the challenge of significant performance degradation in the refrigeration system in refrigerated vehicles caused by overcharging or undercharging of refrigerant,refrigerant R404A was used to construct a refrigeration system with an e-conomizer.An experimental investigation into the optimal charging amount under refrigeration conditions was conducted to analyze the effects of different charging amount on compressor discharge characteristics,cooling capacity,COP,over-cooling and over-heating.The results indicate that as the refrigerant charging amount increases,the discharge temperature decreases by 11.7％,while the discharge pressure rises by 12.7％,the system's cooling capacity and COP initially increase before decreasing.The op-timal refrigerant charging amount for the refrigeration system under refrigeration conditions is found to be 2.9 kg,at which point both the system's cooling capacity and COP reach their peak values of 5.08 kW and 2.71,respectively.
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