CO2双级压缩制冷循环冷藏柜性能实验研究

Experimental Study on Performance of CO2 Two-Stage Compression Refrigeration Cycle Refrigerator

针对目前商用冷藏柜所使用的CFC类制冷剂存在高臭氧衰减指数以及温室指数高的问题,为使冷藏柜更环保,课题组提出了使用CO2双级压缩制冷循环取代传统氟利昂制冷剂单级压缩制冷循环的设想。课题组以某容积为500 L的冷藏柜为框架搭建一套实验系统,并根据可口可乐公司对商用冷藏柜的测试要求进行负载降温测试,并与其他课题组成果进行对比。结果表明采用CO2双级压缩制冷循环系统的冷藏柜比采用单级压缩的同类型冷藏柜能效比提高,排气温度降低34. 6℃。经测试,CO2双级压缩制冷循环冷藏柜性能满足可口可乐公司制定的标准,CO2双级压缩制冷循环在冷藏柜中应用是可行的。

In view of the problems of high ODP and high GWP of CFC refrigerants used in commercial refrigerators at present,the idea of using CO2 two-stage compression refrigeration cycle to replace traditional Freon refrigerant singlestage compression refrigeration cycle was put forward,so as to make refrigerators more environmentally friendly. The research group built an experimental system with a 500 L refrigerator as the frame,and tested the load cooling according to the Coca-Cola’ s test requirements for commercial refrigerators,and compared it with other research results. The results show that the CO2 two-stage compression refrigeration system meets the test requirements. Compared with the same type of refrigerators with single-stage compression,energy efficiency ratio increases,and the exhaust temperature decreases 34. 6 ℃.