Effects of bending on heat transfer performance of axial micro-grooved heat pipe  

作　　者：蒋乐伦 汤勇 潘敏强 

机构地区：[1]School of Mechanical and Automotive Engineering,South China University of Technology

出　　处：《Journal of Central South University》2011年第2期580-586,共7页中南大学学报（英文版）

基　　金：Project(U0834002) supported by the Joint Funds of the National Nature Science Foundation of China and Guangdong Province;Project (2009ZM0134) supported by the Foundational Research Funds for the Central Universities in China

摘　　要：Heat pipe is always bent in the typical application of electronic heat dissipation at high heat flux,which greatly affects its heat transfer performance. The capillary limit of heat transport in the bent micro-grooved heat pipes was analyzed in the vapor pressure drop,the liquid pressure drop and the interaction of the vapor with wick fluid. The bent heat pipes were fabricated and tested from the bending angle,the bending position and the bending radius. The results show that temperature difference and thermal resistance increase while the heat transfer capacity of the heat pipe decreases,with the increase of the bending angles and the bending position closer to the vapor section. However,the effects of bending radius can be ignored. The result agrees well with the predicted equations.Heat pipe is always bent in the typical application of electronic heat dissipation at high heat flux, which greatly affects its heat transfer performance. The capillary limit of heat transport in the bent micro-grooved heat pipes was analyzed in the vapor pressure drop, the liquid pressure drop and the interaction of the vapor with wick fluid. The bent heat pipes were fabricated and tested from the bending angle, the bending position and the bending radius. The results show that temperature difference and thermal resistance increase while the heat transfer capacity of the heat pipe decreases, with the increase of the bending angles and the bending position closer to the vapor section. However, the effects of bending radius can be ignored. The result agrees well with the predicted equations.

关 键 词：electronics cooling system axial micro-grooved heat pipe BENDING heat transfer performance 

分 类 号：TK124[动力工程及工程热物理—工程热物理] TK268.1[动力工程及工程热物理—热能工程]