乙醇水溶液脉动热管传热特性研究.pdfVIP

学兔兔 第47卷第24期 机 械 工 程 学 报 Vl01．47 NO．24 2011年 12月 JOURNAL OF MECHANICAL ENGINEERING Dec． 2 0 1 1 DoI：10．3901／JME．2011．24．117 乙醇水溶液脉动热管传热特性研究木 史维秀 李惟毅 潘利生 谈西峰 云海涛 (天津大学热能工程系 天津 300072) 摘要：以体积分数为50％的乙醇水溶液为工质，在充液率为50％的情况下，对多环路脉动热管的传热特性进行试验与机理研 究，并与无水乙醇的传热效果进行对比。结果表明，采用乙醇水溶液的热管热阻明显低于无水乙醇脉动热管的热阻，并且加 热功率的极限值较高。当倾角为90。时，采用乙醇水溶液的热阻值最低约O．1℃，、)v，传热极限约为300 W。采用无水乙醇作为 脉动工质，倾角为6Oo时的热阻为采用酒精水溶液的1．34～1．49倍，倾角为30。时的热阻为1．28～1．50倍。 关键词：传热性能 倾角 乙醇水溶液 无水乙醇 中图分类号：TK124 Study on Heat Transfer Properties of Aqueous Ethanol Pulsating Heat Pipe SHI Weixiu LI Weiyi PAN Lisheng TAN Xifeng YUN Haitao (Department ofThermal Energy and Refrigeration Engineering，Tianjin University,Tianjin 300072) Abstract：With aqueous ethanol of 50％volume fraction as working fluid and filling ratio of 50％，heat transfer performances of multi-loop pulsating heat pipe(PHP)are studied by expedment and mechanism．Heat transfer effects are compared between aqueous ethanol and ethano1．The results show that thermal resistance of PHP with aqueous ethanol is lower than that with ethanol and the maximum ofheating power with aqueous ethanol is higher than that with ethanol obviously．The minimum ofthermal resistance with working fluid of aqueous ethanol and inclination angle of 90。is about 0．1。C／W,and the maximum of heating power is about 300 W Thermal resistance with working fluid of ethanol and inclination angle of 60。is 1 I34～1．49 times higher than that with aqueous ethano1．and the ratio with inclination angle of 30。is 1．28～1．50． Key words：Heat transfer perform ances Inclination angle Aqueous ethanol Ethanol 管传热性能的影响，并且研究了多通