Performance Evaluation of a Refrigerator Equipped with Liquid-suction Heat Exchangers under the Influence of Non-condensable Gases
The presence of non-condensable gases as an additional thermal resistance inside a refrigerating circuit strongly affects the energy efficiency in the household refrigerators.In this study,the effect of non-condensable gases was varied by the injection amount of dry air into the refrigerating circuit to increase a thermal resistance.Both energy consumption and continuous running tests in the refrigerator were conducted under the various amounts of non-condensable gases.The tested refrigerating circuit was the household side-by-side refrigerator equipped with a liquid-suction heat exchanger (LSHX).As the molar fraction of non-condensable gases was increased from 0% to 1.46%,the amount of energy consumption was found to increase up to ～25%.The increase of the amount of non-condensable gases in refrigerating circuit was found to result in increasing the condensation temperature at the condenser and decreasing the evaporation temperature at the evaporator,which were presumably caused by the low specific heat and increased partial pressure of non-condensable gas.Also,the characteristics of the thermodynamic cycle as a function of the molar fraction of non-condensable gases were analyzed by a pressure-specific enthalpy diagram.
Refrigerating circuit Heat exchanger Non-condensable gas Refrigerator
Kyungmin Ku Doohyun Kim Yujin Hwang Kyong Min Kim Kwang Ho Lee Young Hwang Kwon Jae Keun Lee Bonyoung Goo Seok Ro Kim
School of Mechanical Engineering,Pusan National University,San 30 Jangjeon-dong,Geumjeong-ku,Busan,K Digital Appliance Research Laboratory,LG Electronics Inc 391-2,Gaeumjeong-dong,Changwon,Gyeongnam,Ko
国际会议
第六届压缩机与制冷国际会议(The 6th International Conference on Compressor and Refrigeration(ICCR))
西安
英文
476-485
2008-09-25（万方平台首次上网日期，不代表论文的发表时间）