Numerical investigation on heat transfer of vertical micro-heat pipe arrays

doi:10.3969/j.issn.0438-1157.2014.02.020

Abstract

Abstract: The paper is focused on the working mechanism of micro-heat pipe arrays (MHPAs), which are new efficient phase transition components. The three-dimensional partition-minuteness model is made to analyze the flow and heat transfer in the MHPAs by using the theory of two-phase closed thermosyphon and the theory of condensation on vertical walls with micro-channels. The surface tension is considered in the model. Through partitioning the condensate on the surface of microchannels, the flow and heat transfer are analyzed, giving the thickness of condensate, temperature distribution and mass flux. The Matlab programs based on the three-dimensional partition-minuteness model are used. The calculation results agree with the experimental results. The error is within 5%. The formulas for the saturation temperature in the condensation part of the MHPA are obtained from the calculated results.

Key words: micro heat pipe, condensation, heat transfer, mumerical analysis

摘要： 对新型高效传热元件平板微热管阵列（MHPA）的工作机理进行了理论研究。通过建立分区微元模型对热管冷凝段内部工质的流动与传热过程进行了分析。确定了微槽内冷凝液膜的厚度，温度场分布及质量流量等物理参数。利用Matlab软件编写的程序计算结果与实验值吻合较好，最大误差在5%以内。根据软件计算的结果，拟合得到了冷凝段内部饱和温度的表达式。

关键词: 微热管, 凝结, 传热, 数值分析

CLC Number:

TK124

WANG Hongyan, ZHAO Yaohua. Numerical investigation on heat transfer of vertical micro-heat pipe arrays[J]. CIESC Journal, 2014, 65(2): 508-515.

王宏燕, 赵耀华. 平板微热管阵列垂直传热的数值分析[J]. 化工学报, 2014, 65(2): 508-515.

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