埋管冷凝CO_(2)制冷系统实验研究  

Experimental study on buried pipe condensing CO_(2) refrigeration system

作　　者：郝嘉临 申江[1] 胡开永[1] 吴冬夏 周成君 张德权[3] Hao Jialin;Shen Jiang;Hu Kaiyong;Wu Dongxia;Zhou Chengjun;Zhang Dequan(Tianjin Key Laboratory of Refrigeration Technology,Tianjin University of Commerce,Tianjin 300134,China;Jingkelun Refrigeration Equipment Co.,Ltd.,Beijing 101302,China;Institute of Food Science and Technology,Chinese Academy of Agricultural Sciences,National Risk Assessment Laboratory of Agro-products Processing Quality and Safety,Ministry of Agriculture and Rural Affairs,Beijing 100193,China)

机构地区：[1]天津商业大学,天津市制冷技术重点实验室,天津300134 [2]北京市京科伦冷冻设备有限公司,北京101302 [3]中国农业科学院农产品加工研究所/农业农村部农产品质量安全收贮运管控重点实验室,北京100193

出　　处：《低温与超导》2021年第6期63-68,共6页Cryogenics and Superconductivity

基　　金：农业农村部农产品质量安全收贮运管控重点实验室开放课题(S2020KFKT-06)、中国标准化研究院院长基金重大项目(542019Y-6659)资助。

摘　　要：为研究采用地埋管为冷凝器的CO_(2)制冷系统性能,对系统进行实验研究,监测系统运行时各项参数以及地下土壤温度变化并记录。结果显示:常温带附近测点处(10~80 m)的土壤温度可以长期维持在15℃附近,因此更有利于CO_(2)的冷凝温度压力处于亚临界状态。浅层土壤温度由于处于变温带附近测点处(2~4 m)容易受到环境温度的影响。但由于土壤自身具有热惰性,使得土壤温度与环境温度存在约15天的延迟;该实验工况下,蒸发温度每升高1℃,压缩机的制冷剂流量和功耗分别上升7.2%和1.5%;蒸发器的制冷剂流量和制冷量分别上升5.5%和5.6%,COP上升1.7%;而压缩机排气温度和压力比分别下降2.7%和2.3%。To study the performance of CO_(2)refrigeration system using buried pipe as condenser,an experiment was carried out,parameters of the system operation and underground soil temperature changes were monitored and recorded.The results show that the soil temperature at the normal temperature zone(10~80 m)can be maintained around 15℃for a long time,so it is more conducive to the subcritical state of the condensation temperature and pressure of CO_(2).Shallow soil temperature is easily affected by ambient temperature because it is located at the metatropical measuring point(2~4 m).However,due to the thermal inertia of soil itself,there is a delay of about 15 days between soil temperature and ambient temperature.Under the experimental conditions,the refrigerant flow and power consumption of the compressor increase by 7.2%and 1.5%,respectively,when the evaporation temperature increases by 1℃.The refrigerant flow and refrigerating capacity of evaporator increase by 5.5%and 5.6%respectively,and COP increases by 1.7%.The compressor exhaust temperature and pressure ratio decrease by 2.7%and 2.3%,respectively.

关 键 词：CO_(2) 地埋管 实验 

分 类 号：TB61[一般工业技术—制冷工程]