Experimental study on loop heat pipe with two-wick flat evaporator
Experimental study on loop heat pipe with two-wick flat evaporator
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两芯平板蒸发器环路热管实验研究
DOI：
10.1016/j.ijthermalsci.2015.02.007
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发表时间：
2015-08
影响因子：
4.5
通讯作者：
Liu Wei
中科院分区：
文献类型：
--
作者：
Wang Dongdong;Jiang Chi;Yang Jinguo;Liu Wei
平板型回路热管（FLHP）具有传热能力强、温差小、安装方便、无运动部件等优点，在热控制和电子冷却领域具有广阔的应用前景。然而，它具有诸如蒸发器中的高反向传导的缺点。许多研究旨在通过改变工作流体或多孔材料来改善FLHP的性能。在具有平板蒸发器的回路热管中，由于毛细芯的反向导热和蒸发器的侧壁导热，补偿室通常处于汽液两相状态。当热负荷在一定范围内时，补偿室内产生气泡，然后气泡消失，温度和压力波动，导致LHP运行不稳定。为了消除或减少平板蒸发器中的背导现象，本研究开发了一种以甲醇和丙酮为工质，在黄铜蒸发器中布置两个初级烧结镍粉芯的回路热管。研究了在不同热负荷条件下的启动和运行。实验结果表明，该新型LHP可以成功启动，并在10-170 W的较宽热负荷范围内运行。当模拟热源与蒸发器接触面的温度不超过90 ℃时，最大热负荷可达170 W，对应的热通量为17.7 W/cm 2。
A flat-type loop heat pipe (FLHP) is considered promising for applications in the field of thermal control and electronic cooling owing to its many advantages such as high heat transfer capability with small temperature difference, easy installation, and lack of moving parts. However, it suffers from drawbacks such as high back-conduction in the evaporator. Many studies have aimed to improve the performance of FLHPs by changing the working fluid or porous materials. In a loop heat pipe (LHP) with a flat evaporator, the compensation chamber (CC) is usually in the vapor–liquid two-phase state owing to backward conduction of the wick and side-wall conduction of the evaporator. When the heat load is in a certain range, bubbles are generated and then annihilated in the compensation chamber, and the temperature and pressure fluctuate, causing unstable LHP operation. To eliminate or reduce back-conduction in the flat evaporator, this study develops a loop heat pipe with two primary sintered nickel powder wicks arranged in an evaporator made of brass and using methanol and acetone as the working fluids. The startup and operation are studied under variable conditions with different heat loads. The experimental results show that our novel LHP can start up successfully and operate in a wide heat load range of 10–170 W. When the temperature of the contact surface between the simulated heat source and the evaporator does not exceed 90 °C, the maximum heat load can reach 170 W, which corresponds to a heat flux of 17.7 W/cm2.
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影响因子：
4.5
作者：
Shen-Chun Wu;Dawn Wang;Yau‐Ming Chen
通讯作者：
Shen-Chun Wu;Dawn Wang;Yau‐Ming Chen
影响因子：
2.2
作者：
Zhichun Liu;W. Liu;A. Nakayama
通讯作者：
Zhichun Liu;W. Liu;A. Nakayama
DOI：
10.1016/j.ijthermalsci.2012.02.027
发表时间：
2012-08-01
影响因子：
4.5
作者：
Liu, ZhiChun;Li, Huan;Liu, Wei
通讯作者：
Liu, Wei
平板蒸发器环路热管中两种双孔吸液芯的工作特性
DOI：
10.1016/j.ijheatmasstransfer.2011.12.004
发表时间：
2012-03
影响因子：
5.2
作者：
Chen, B. B.;Liu, Z. C.;Liu, W.;Yang, J. G.;Li, H.;Wang, D. D.
通讯作者：
Wang, D. D.
DOI：
10.1016/j.ijheatmasstransfer.2011.09.010
发表时间：
2012-01
影响因子：
5.2
作者：
X. Nguyen;B. Sung;Jeehoon Choi;S. Ryoo;H. Ko;Chul-ju Kim
通讯作者：
X. Nguyen;B. Sung;Jeehoon Choi;S. Ryoo;H. Ko;Chul-ju Kim