Study on Relationship between Partial Load and Rib Effect Coefficient of Refrigeration Heat Exchanger Used in Air Conditioning
The relationship between thermal resistance ratio ζ(the ratio of thermal resistance between two sides of the tube wall) and load rate,according to heat transfer theory,is derived from simplifying the heat transfer model of heat exchanger.Considering the different running time of heat exchanger under variable load,the operation heat is proposed.Then the range of thermal resistance ratio for evaporator and condenser is determined and the law of thermal resistance is validated by analyzing the example.As a result,the relationship between rib effect coefficient and the thermal resistance ratio is established.Furthermore,value analysis of rib effect coefficient is analyzed.Results of this study show that the heat transfer performance of evaporator and condenser maximizes when ζ=1 at the partial load rate of (0.25,0.50).Meanwhile,rib effect coefficient on the water side is less than that of the refrigerant side for evaporator and condenser.
Condenser Evaporator Thermal resistance ratio Operation heat Rib effect coefficient
Houhua Wang Houshuai Wang
Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing400045, China
国际会议
台湾
英文
2922-2930
2011-12-11（万方平台首次上网日期，不代表论文的发表时间）