跨临界CO_2热泵系统关键参数的实验研究  

Experimental Study of Key Parameter on Transcritical CO_2 Heat Pump System

作　　者：朱治江[1] 陈光明[1] 佟杨[1] 唐黎明[1] 林顺荣[1] 陈琪[1] 

机构地区：[1]浙江大学制冷与低温研究所,浙江杭州310027

出　　处：《工程热物理学报》2011年第7期1103-1106,共4页Journal of Engineering Thermophysics

基　　金：国家科技支撑计划资助项目(No.2006BAJ01A10);浙江省重大科技专项(No.2007C01002)

摘　　要：系统运行时外部参数变化将引起系统各内部参数变化,本文通过改变外部参数冷却水流量研究内部关键参数变化趋势。实验结果表明:随着冷却水的流量增加,压比减少,气体冷却器出口温度和排气压力降低,制热量和制热系数增加。在此基础上,通过调节外部参数研究气体冷却器出口温度以及蒸发温度对系统性能的影响。结果表明:随着蒸发温度的升高,制热系数随之提高;气体冷却器出口温度从34.3℃升高到41.4℃制热系数下降22%。The variation of the external parameters will lead to the variation of internal parameters, we investigate the trends of internal key parameters by altering the cooling water flow rate.Experiment results show that the pressure ratio,the outlet temperature of gas cooler and exhaust pressure decrease,meanwhile the heating capacity and heating coefficient of performance（COP_h）increases when the cooling water flow rate increases.Based on above research,the effects of evaporation temperature and outlet temperature of gas cooler on system performance are investigated by adjusting the external parameters.Experiment results show that COP_h increases when the evaporation temperature increases,COP_h reduces about 22%when the outlet temperature of gas cooler changes from 34.3℃to 41.4℃.

关 键 词：CO_2 气体冷却器 外部参数 内部参数 

分 类 号：TB61[一般工业技术—制冷工程]