低压补气新型冷藏系统的实验研究  

Experimental study on a new type and low-pressure air-supplement refrigeration system

作　　者：周光辉[1] 王春艳 李海军[1] 张中来 余壮 张朋飞 Zhou Guanghui;Wang Chunyan;Li Haijun;Zhang Zhonglai;Yu Zhuang;Zhang Pengfei(School of Energy&Environment,Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]中原工学院能源与环境学院,郑州450007

出　　处：《低温与超导》2020年第12期63-68,共6页Cryogenics and Superconductivity

基　　金：河南省产学研合作项目(152107000007,162107000061)资助。

摘　　要：针对冷藏机组存在冷藏设备落后、系统运行不稳定、排气温度过高导致停机等问题,开发了一套库内外采用平行流换热器且基于准双级压缩理论的低压补气的新型冷藏系统,并研究了过热度、低压补气对冷藏系统制冷性能的影响。结果表明:正常冷藏工况下,主阀过热度为5 K、补阀过热度为30 K时,冷藏系统运行稳定、匹配性优、节能性好。库内温度由-5℃升到5℃整体过程中,低压补气系统与不补气系统相比较,压缩机功率降低了0.4%,制冷量和COP分别增加了24.2%、64.6%,排气温度降低了21.6℃;进行高温43℃制冷实验时,冷藏系统仍稳定运行。Aimed at the problems of backward refrigeration equipment, unstable system operation and excessive exhaust temperature caused by shutdown of refrigeration units,a new type of refrigeration system was developed using parallel flow heat exchangers inside and outside the warehouse and based on quasi-two-stage compression theory with low-pressure air supplement,the effects of superheat and low-pressure supplemental air on the refrigeration performance of the refrigeration system were studied.The results show that under normal refrigeration conditions, when the superheat of the main valve is 5 K and the superheat of the supplementary valve is 30 K, the refrigeration system operates stably and has excellent matching and good energy saving.During the whole process of temperature rise from-5 ℃ to 5 ℃, the compressor power is reduced by 0.4%, the cooling capacity and COP increase by 24.2% and 64.6% respectively, and the exhaust temperature reduces by 21.6 ℃.At 43 ℃ of the high temperature refrigeration experiment, the refrigeration system is still running stably.

关 键 词：新型冷藏系统 过热度 低压补气 排气温度 

分 类 号：TH3[机械工程—机械制造及自动化]