Heat transfer characteristic of flat plate heat pipe cooling system for LED

doi:10.11949/j.issn.0438-1157.20170562

Abstract

Abstract:

A new kind of flat plate heat pipe is designed in this article,which uses oxidative dehydration as well as molecular self-assembling method to make hydrophilic and hydrophobic membranes. Membrane's hydrophilicity can be characterized by measuring the contact angle. For hydrophilic membrane,its contact angle is only 9.3°,but that for hydrophobic membrane reaches 153°. Based on the characteristics of the heat pipe after surface modification,four kinds of LED cooling systems are designed for comparison. hot wire method and thermal resistance analysis are used to compare each system's performance. Among theses four cooling systems,the flat plate heat pipe combining with forced convection system has the highest ultimate cooling power,which reaches 55 W.

Key words: flat plate heat pipe, heat transfer, hydrophibic and hydrophobic film, experimental validation, optimal design

摘要：

设计了一种平板热管，使用氧化-脱水法和分子自组装法分别对铜基底进行亲水、疏水薄膜的制备，通过测量接触角直观地表征其亲水、疏水性能，亲水薄膜的接触角仅为9.3°，疏水薄膜的接触角达到了153°。基于表面改性后的平板热管的特点设计了4种LED散热系统进行对比实验测试，并采用热线型法和热阻分析法对比分析各散热系统的性能。在4种散热系统中，极限散热功率最大的为平板热管-强制对流复合散热系统，其极限散热功率为55 W。

关键词: 平板热管, 传热, 亲疏水薄膜, 实验验证, 优化设计

CLC Number:

TK124

TIAN Zhongxuan, WANG Changhong, ZHEN Huanpei, HUANG Jiongtong. Heat transfer characteristic of flat plate heat pipe cooling system for LED[J]. CIESC Journal, 2017, 68(S1): 155-161.

田中轩, 王长宏, 郑焕培, 黄炯桐. LED平板热管散热系统的性能分析[J]. 化工学报, 2017, 68(S1): 155-161.

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