回热器对跨临界CO_2压缩喷射系统的影响  

THE EFFECT OF INTERNAL HEAT EXCHANGER ON TRANSCRITICAL CO_2 COMPRESSION-EJECTION SYSTEM

作　　者：朱治江[1] 陈光明[1] 唐黎明[1] 徐肖肖[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1期21-24,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：为了研究回热器对跨临界CO_2压缩喷射系统的影响,本文在自行搭建的跨临界CO_2压缩喷射系统实验平台上,通过改变冷却水进口温度分别对带回热器的跨临界CO_2压缩喷射系统(TCES-IHX)和不带回热器的跨临界CO_2压缩喷射系统(TCES)进行了性能测试。分析和比较了这两种系统模式下制热系数(COP_h)、制热量、喷射系数、升压比等参数的变化趋势。实验结果表明:回热器的加入使跨临界CO_2压缩喷射系统的压缩机质量流量增加、喷射系数增大而升压比降低,制热系数的增加可以证明回热器对跨临界CO_2压缩喷射系统性能的提高起到积极的作用。This experimental study presents the effect of internal heat exchanger（IHX） on transcritical CO2 compression-ejection system.An experimental setup of transcritical CO2 compression-ejection system was developed.The performance comparison between the transcritical CO2 ejector systems without IHX（TCES） and with IHX（TCES-IHX） by altering the inlet temperature of cooling water was investigated.Results were analyzed to assess the influence of IHX on the heating coefficient of performance（COPh）,heating capacity,entrainment ratio,and pressure lift.It is found that the refrigerant flow rate through compressor increases,entrainment ratio increases,while pressure lift decreases when the IHX is added into transcritical CO2 compression-ejection system.It has demonstrated that the IHX has a positive effect on increasing COPh of transcritical CO2 compression-ejection system.

关 键 词：回热器 喷射器 CO2 跨临界循环 

分 类 号：TB61[一般工业技术—制冷工程]