Experiment study on heat transfer capability of an innovative gravity assisted ultra-thin looped heat pipe
Experiment study on heat transfer capability of an innovative gravity assisted ultra-thin looped heat pipe
复制标题
创新型重力辅助超薄环形热管传热能力实验研究
DOI：
10.1016/j.ijthermalsci.2015.04.003
复制
发表时间：
2015-09-01
影响因子：
4.5
通讯作者：
Zhang, Zhengguo
中科院分区：
文献类型：
--
作者：
Hong, Sihui;Zhang, Xinqiang;Zhang, Zhengguo
本文介绍了一种可用于动力电池热管理系统的重力辅助超薄环形热管（ULHP），该热管具有1.5 mm厚的无芯扁平蒸发器，并对其传热性能进行了研究。考虑到空冷价格低廉、在各行各业应用广泛的优点，采用空冷作为冷凝方式。在20 ~ 80 W的同一热负荷范围内，进行了不同冷凝功率下的一系列实验，找出了ULHP的最佳冷凝条件。在最佳冷凝条件下进行了进一步的实验，并对启动温度、最小启动热负荷和热阻进行了讨论。实验结果表明，在风机电压为9 V时，ULHP能以0.22 W/cm(2)的最小热流密度启动，启动温度为47℃，在20 W ~ 120 W的热负荷范围内，与文献中垂直放置微型环状热管带芯结构平板蒸发器（MFLHP）相比，其最小热阻仅为0.097 W/K。该装置可以在较低的热流密度、较低的温度和较低的热阻下启动，比传统的MFLHP性能有所提高。(C) 2015 Elsevier Masson SAS。版权所有。
This paper introduced a kind of gravity assisted ultra-thin looped heat pipe (ULHP) with 1.5 mm thick wickless flat evaporator that tan be applied for power battery thermal management system, and investigated the heat transfer capability of the ULHP. Air cooling was used as the condensation method considering its advantage of low price and wide application in all walks of life. A series of experiments were conducted under different condensation powers during the same heating load range which started from 20 W to 80 W, to find out the best condensation condition of the ULHP. Further experiments were conducted under the best condensation condition to clarify the heat transfer capability of the ULHP, during which the start -up temperature, the minimum start-up heat load and the thermal resistance were discussed. The experiment results indicated that the ULHP can work most effectively as the fan voltage was 9 V, under which the ULHP can start up at minimum heat flux of 0.22 W/cm(2), with the start-up temperature of 47 degrees C, and the minimum thermal resistance was just 0.097 W/K during the heat load range from 20 W to 120 W Compared with vertical placed miniature looped heat pipe with wick structure flat evaporator (MFLHP) in literature, the ULHP can start under lower heat flux with lower temperature and lower thermal resistance, which showed an improved performance of ULHP than traditional MFLHP. (C) 2015 Elsevier Masson SAS. All rights reserved.