冷藏车制冷系统最佳充注量的实验研究  

Experimental study on the optimal charging amount of refrigeration system for refrigerated trucks

作　　者：赵晓丹 张超 苏之勇 Zhao Xiaodan;Zhang Chao;Su Zhiyong(Zhengzhou University of Economics and Trade,Zhengzhou 450007,China;School of Energy&Environment,Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]郑州经贸学院,郑州450007 [2]中原工学院,郑州450007

出　　处：《低温与超导》2024年第9期78-83,共6页Cryogenics and Superconductivity

基　　金：河南省科技攻关计划项目(202102310555);中国纺织工业联合会科技指导计划性项目(2024038);郑州经贸学院青年科研基金重点项目(QK2203);郑州经贸学院科技攻关项目(ky1905)资助。

摘　　要：针对冷藏车制冷系统中,制冷剂充注量过充或欠充造成系统性能严重衰减的难题,采用制冷剂R404A,搭建了带经济器的冷藏车制冷系统。在冷藏工况下对系统进行了最佳充注量的实验研究,分析了不同充注量对系统压缩机排气特性、制冷量、COP、过冷度及过热度的影响。实验结果表明:随着系统内制冷剂充注量的不断增加,排气温度降低了11.7%,排气压力升高了12.7%,系统制冷量、COP均随之先升高后下降。冷藏工况下的系统制冷剂最佳充注量为2.9 kg,此时系统制冷量、COP均达到峰值,分别为5.08 kW、2.71。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 economizer.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 overheating.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 optimal 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.

关 键 词：冷藏车 制冷系统 最佳充注量 过冷度 

分 类 号：TB611[一般工业技术—制冷工程]