充液率及工质对复合中空热管传热性能的影响  

Influence of liquid filling rate and working fluid on heat transfer performance of compound hollow heat pipe

作　　者：肖章平[1] 蔡欣[1] 张琳[1] 马志磊[1] 蔡金龙[1] 

机构地区：[1]常州大学机械工程学院,江苏常州213016

出　　处：《化学工程》2013年第12期31-34,共4页Chemical Engineering(China)

基　　金：江苏省科技计划项目(BY2012102)

摘　　要：建立了复合中空热管传热性能实验平台,对不同充液率(20%,25%,33%,40%,50%)和不同工质(蒸馏水,无水乙醇,重铬酸钾溶液)条件下的复合中空热管传热性能进行了实验研究。研究表明:当工质为蒸馏水时,复合中空热管的最佳充液率为33%;当充液率均为33%时,无水乙醇工质复合中空热管的传热性能最好,其次是蒸馏水工质和重铬酸钾溶液工质的复合中空热管;当充液率为20%时,蒸馏水工质的复合中空热管的传热性能变化趋势明显与充液率为25%,33%,40%,50%时不同,而且传热效果最差。当充液率均为33%、工质为纯水时,加热蒸汽热流密度(102,108,115 kW/m2)不同,复合中空热管的传热性能也不同,传热性能随着加热蒸汽热流密度的提高而提高。实验研究为工业应用提供了基础。The experimental platform of heat transfer performance on compound hollow heat pipe was set up. The experimental investigation was conducted to explore the heat transfer performance of compound hollow heat pipe （CHHP） under different filling liquid rates （20% ,25%, 33% ,40%, 50% ） and different working fluids （pure water, anhydrous ethanol, K2Cr207）. The results show that when the working fluid is pure water, the heat transfer performance of CHHP with 33% filling liquid rate is the best. When filling liquid rate is 33%, the heat transfer performance of CHHP with anhydrous ethanol working fluid is the best. Under 20% liquid filling rate, the change tend of heat transfer performance for CHHP is obviously different from that of 25% , 33% ,40% and 50% filling liquid rates. When filling liquid rate is 33% and working fluid is pure water, the heat flux of heating steam are 102, 108, 115 kW/m2 respectively, the heat transfer performances of CHHP are obviously different, and their heat transfer coefficients increase with the increase of heat flux of heating steam. The experimental researches provide the reference for the industrial application of compound hollow heat pipe exchanger.

关 键 词：复合中空热管 充液率 蒸馏水 无水乙醇 重铬酸钾溶液 传热性能 强化传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]