DEVELOPMENT AND VALIDATION OF A MICROCHANNEL EVAPORATOR MODEL FOR A CO2 AIR-CONDITIONING SYSTEM
This paper presents an analysis/computer model to predict the performance of an evaporator for a CO2 mobile air-conditioning system. Based on the finite volume method, the model has been developed by using mass and energy conservation equations, with emphasis placed on the refrigerant-side heat transfer and pressure drop characteristics. The in-tube refrigerant flow was divided into two-phase region and superheated region, and both dry and wet conditions were considered. Using the newly developed refrigerant-side heat transfer and pressure drop correlations, the model can predict the performance of evaporator with a reasonable accuracy compared with the experimental data. The errors of RMS for cooling capacities and refrigerant-side pressure drops were ±1.9％ and ±12.3％ respectively. Furthermore, the effects of selecting different refrigerant-side heat transfer and pressure drop model on the performance of evaporator were discussed.
Jifeng JIN Jiangping CHEN Zhijiu CHEN
Inst. Refrigeration and Cryogenics Eng., Shanghai Jiaotong University,Shanghai, 200240, China
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）