组合式吸液芯高温热管热阻和瞬时传热性能分析  

Analysis on Transient Heat Transfer Performance and Thermal Resistances of High Temperature Heat Pipe with Combined Wick

作　　者：沈妍[1,2] 张红[3,2] 许辉[2] 于萍[2] 白穜[2] 

机构地区：[1]江苏科技大学机电与汽车工程学院,江苏张家港215600 [2]南京工业大学能源学院,江苏南京211816 [3]常州工学院,江苏常州213002

出　　处：《应用基础与工程科学学报》2015年第3期541-553,共13页Journal of Basic Science and Engineering

基　　金：国家自然科学基金项目(51076062)

摘　　要：根据碟式太阳能热管接收器的工作情况,开发设计了加工简便、成本较低的组合式吸液芯高温热管.对该热管建立了热阻模型,通过试验验证热阻模型的可靠性,并从温度、热阻和当量导热系数3方面与三角沟槽/金属丝网吸液芯热管进行比较,分析了热管瞬时传热性能.在相同的冷却工况下,与三角沟槽/金属丝网吸液芯热管相比,组合式吸液芯热阻稳定且较小,当量导热系数较大.因此,组合式吸液芯高温热管较三角沟槽/金属丝网吸液芯热管传热性能优良,可较好地应用于碟式太阳能接收器.According to the operating condition of dish solar heat pipe receiver,high temperature heat pipe with combined wick was designed and developed with simple structure and low-cost.Thermal resistance model of heat pipe with combined wick was built and verified by experiments. Transient heat transfer performance of heat pipes with combined wick and triangular grooved / screen mesh wick had been analyzed on three aspects of temperature,thermal resistance and equivalent thermal conductivity. By comparing with heat pipe with triangular grooved / screen mesh wick under the same changes of cooling,thermal resistances of heat pipe with combined wick is smaller and changes more smoothly,and the equivalent thermal conductivity is higher. Therefore,high temperature heat pipe with combined wick has better transient heat transfer performance than heat pipe with triangular grooved / screen mesh wick,and it is more suitable for dish solar heat pipe receiver.

关 键 词：高温热管 组合式吸液芯 热阻 当量导热系数 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]