CO_2热泵双级冷却套管式气体冷却器性能数值模拟  

Numerical Simulation of Two-stage Tube-in-tube Gas Cooler in CO_2 Heat Pump

作　　者：马瑞芳[1] 李雯[2] 李世平[2] 罗会龙[1] Ma Ruifang Li Wen Li Shiping Luo Huilong(Faculty of Civil Engineering, Kunming University of Science and Technology, Kunming, 650500 Yunnan Rural Science and Technology Service Center, Kunming, 650021)

机构地区：[1]昆明理工大学建筑工程学院,昆明650500 [2]云南省农村科技服务中心,昆明650021

出　　处：《制冷与空调（四川）》2016年第5期520-524,548,共6页Refrigeration and Air Conditioning

基　　金：国家自然科学基金项目(51166005);国家科技支撑计划项目(2012BAA13B02)

摘　　要：建立了跨临界CO_2制冷系统中双级冷却套管式气体冷却器模型,对管内CO_2侧和水侧的流动及换热进行了数值仿真。分析了各种参数下的双级冷却套管式气体冷却器的性能。比较了多种工况下的仿真结果与试验数据,验证了该模型的正确性。A model was developed for two-stage tube-in-tube gas cooler in trans-critical carbon dioxide refrigeration systems. Fluid flow and heat transfer processes in both refrigerant and water sides were analyzed with the latest physical properties database and the corresponding correlations. The model was validated by the comparison between simulation results and experimental data under various conditions. Further more, the influences of major parameters on two-stage tube-in-tube gas cooler performance were analyzed and discussed. The model developed in this paper could be used for the optimal design of gas coolers.

关 键 词：CO2热泵 跨临界循环 双级冷却套管式冷凝器 仿真 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]