摘要
基于自动复叠制冷循环设计并搭建了实验系统,针对多级自动复叠制冷系统中混合工质的配比以及实际运行中循环特性的难题,利用气相色谱仪对五级自动复叠制冷系统中混合工质在各级的实际运行的成分进行了取样、检测和分析。经过多次调试,使系统达到−126℃的低温工况,并通过实验全面了解循环过程中各级的状态。结果发现,自动复叠制冷循环中制冷剂的配比对系统的运行压力、各级毛细管节流后的温度、各级中间换热器的换热温差等参数影响很大。研究为混合工质的运行成分分析提供了指导与建议。
An auto-cascade refrigeration cycle(ARC)system was designed and built in the lab.Aiming at the key problems concerning the mixing ratio of non-azeotropic mixed-refrigerants and the cycling performance in the real operations,the actual running components in the multi-stage ARC system were sampled,tested and analyzed by gas chromatography.After debugging,the temperature of−126℃could be achieved by the system.The status of each stage in the cycling process was fully understood by experimental investigations.The results showed that the mixing ratio of refrigerants in ARC system had a great influence on the parameters such as the operation pressure,temperature after throttling of each capillary,heat transfer temperature difference among heat exchangers and so on.The study could provide the guidance and suggestion for the application of mixed refrigerants in the multi-stage ARC system.
作者
张汉青
张华
张书春
吴银龙
邱金友
ZHANG Hanqing;ZHANG Hua;ZHNAG Shuchun;WU Yinlong;QIU Jinyou(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《能源研究与信息》
2019年第4期210-215,220,共7页
Energy Research and Information
关键词
多级自动复叠
混合工质
组分分析
实验研究
multi-stage auto-cascade
mixed-refrigerants
composition analysis
experimental investigation
