Operational characteristics of two biporous wicks used in loop heat pipe with flat evaporator

Operational characteristics of two biporous wicks used in loop heat pipe with flat evaporator
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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
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发表时间:
2012-03
影响因子:
5.2
通讯作者:
Wang, D. D.
Wang, D. D.
中科院分区:
工程技术2区
文献类型:
--
作者:
Chen, B. B.;Liu, Z. C.;Liu, W.;Yang, J. G.;Li, H.;Wang, D. D.

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为提高不锈钢-氨回路热管的传热性能,采用了两种特殊的双孔吸液芯。实验结果表明,孔隙率为69%(LHP 2)的芯的热力学和水力学特性优于孔隙率为65%(LHP 1)的芯。当蒸发器允许温度低于60°C时,LHP 1和LHP 2的最大热负荷分别可达120 W(热流密度11.8W/cm ~ 2)和130 W(热流密度12.8W/cm ~ 2)。同时,它们可以在低至2.5W的热负荷下启动。LHP对热负荷的响应非常快速和平滑,并且运行稳定,没有明显的温度振荡。LHP的总热阻在1.47和0.33°C/W之间变化,热负荷范围从10到130 W。
Two special biporous wicks are adopted in stainless-steel–ammonia loop heat pipes (LHPs) with flat evaporator to enhance their heat transfer performances. The experimental results demonstrate that thermal and hydraulic characteristics of the wick with porosity of 69% (in LHP 2) are better than that of the wick with porosity of 65% (in LHP 1). The maximum heat loads of LHP 1 and LHP 2 could, respectively, reach 120W (heat flux 11.8W/cm2) and 130W (12.8W/cm2) at the allowable evaporator temperature below 60°C. Meanwhile, they can start up at heat load as low as 2.5W. The LHPs show very fast and smooth response to heat load and operate stably without obvious temperature oscillation. The total thermal resistances of the LHPs vary between 1.47 and 0.33°C/W at heat load ranging from 10 to 130W.
DOI: 10.1016/j.ijheatmasstransfer.2010.04.008
发表时间: 2010-08
影响因子: 5.2
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