Effect of Charge Amount and Length of IHX on Performance Characteristics of CO2 Cooling System
An experimental study on the performance characteristics of effective heat pump in the cooling mode using a single-stage compression CO2 cycle with an IHX(internal heat exchanger) was carried out.The performance of a single-stage compression with IHX was investigated according to charge amount and operating condition.Moreover,the performance characteristic of cooling operating was analyzed with the length of IHX.As a result,the optimum refrigerant charge amount was 2.2 kg.The optimal system COP for compressor frequency of 30,40,50,and 60 Hz was 3.493,3.228,2.978,and 2.659,respectively.Since the system with an IHX can maintain large cooling capacity regardless of operating condition,the system performance doesn’t reduce considerably under non-favorable condition.When the compressor frequency was 40 Hz,the COP for a system with IHX length of 3 m and 5 m was 3.361 and 3.51,respectively.By using the IHX into a CO2 cooling system,the performance and reliability improves simultaneously.
KWAK M.S CHO H.H
Graduate School of Mechanical Engineering,Chosun University,Gwangju 501-759,Korea Department Mechanical Engineering,Chosun University,Gwangju 501-759,Korea
国际会议
西安
英文
1-5
2012-08-26（万方平台首次上网日期，不代表论文的发表时间）