Experimental Study on the Heat Transfer Performance of Pump-Assisted Capillary Phase-Change Loop

To overcome the two-phase flow instability of traditional boiling heat dissipation technologies, a porous wick was used for liquid-vapor isolation, achieving efficient and stable boiling heat dissipation. A pump-assisted capillary phase-change loop with methanol as the working medium was established...

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Autores principales:	Xiaoping Yang, Gaoxiang Wang, Cancan Zhang, Jie Liu, Jinjia Wei
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	liquid cooling phase-change loop pressure difference heat transfer enhancement Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/aaa62ea59a4a4e95b7205c985ca25627
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spelling	oai:doaj.org-article:aaa62ea59a4a4e95b7205c985ca256272021-11-25T16:41:44ZExperimental Study on the Heat Transfer Performance of Pump-Assisted Capillary Phase-Change Loop10.3390/app1122109542076-3417https://doaj.org/article/aaa62ea59a4a4e95b7205c985ca256272021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/10954https://doaj.org/toc/2076-3417To overcome the two-phase flow instability of traditional boiling heat dissipation technologies, a porous wick was used for liquid-vapor isolation, achieving efficient and stable boiling heat dissipation. A pump-assisted capillary phase-change loop with methanol as the working medium was established to study the effect of liquid-vapor pressure difference and heating power on its start-up and steady-state characteristics. The results indicated that the evaporator undergoes four heat transfer modes, including flooded, partially flooded, thin-film evaporation, and overheating. The thin-film evaporation mode was the most efficient with the shortest start-up period. In addition, heat transfer modes were determined by the liquid-vapor pressure difference and power. The heat transfer coefficient significantly improved and the thermal resistance was reduced by increasing liquid-vapor pressure as long as it did not exceed 8 kPa. However, when the liquid-vapor pressure exceeded 8 kPa, its influence on the heat transfer coefficient weakened. In addition, a two-dimensional heat transfer mode distribution diagram concerning both liquid-vapor pressure difference and power was drawn after a large number of experiments. During an engineering application, the liquid-vapor pressure difference can be controlled to maintain efficient thin-film evaporation in order to achieve the optimum heat dissipation effect.Xiaoping YangGaoxiang WangCancan ZhangJie LiuJinjia WeiMDPI AGarticleliquid coolingphase-change looppressure differenceheat transfer enhancementTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10954, p 10954 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	liquid cooling phase-change loop pressure difference heat transfer enhancement Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	liquid cooling phase-change loop pressure difference heat transfer enhancement Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Xiaoping Yang Gaoxiang Wang Cancan Zhang Jie Liu Jinjia Wei Experimental Study on the Heat Transfer Performance of Pump-Assisted Capillary Phase-Change Loop
description	To overcome the two-phase flow instability of traditional boiling heat dissipation technologies, a porous wick was used for liquid-vapor isolation, achieving efficient and stable boiling heat dissipation. A pump-assisted capillary phase-change loop with methanol as the working medium was established to study the effect of liquid-vapor pressure difference and heating power on its start-up and steady-state characteristics. The results indicated that the evaporator undergoes four heat transfer modes, including flooded, partially flooded, thin-film evaporation, and overheating. The thin-film evaporation mode was the most efficient with the shortest start-up period. In addition, heat transfer modes were determined by the liquid-vapor pressure difference and power. The heat transfer coefficient significantly improved and the thermal resistance was reduced by increasing liquid-vapor pressure as long as it did not exceed 8 kPa. However, when the liquid-vapor pressure exceeded 8 kPa, its influence on the heat transfer coefficient weakened. In addition, a two-dimensional heat transfer mode distribution diagram concerning both liquid-vapor pressure difference and power was drawn after a large number of experiments. During an engineering application, the liquid-vapor pressure difference can be controlled to maintain efficient thin-film evaporation in order to achieve the optimum heat dissipation effect.
format	article
author	Xiaoping Yang Gaoxiang Wang Cancan Zhang Jie Liu Jinjia Wei
author_facet	Xiaoping Yang Gaoxiang Wang Cancan Zhang Jie Liu Jinjia Wei
author_sort	Xiaoping Yang
title	Experimental Study on the Heat Transfer Performance of Pump-Assisted Capillary Phase-Change Loop
title_short	Experimental Study on the Heat Transfer Performance of Pump-Assisted Capillary Phase-Change Loop
title_full	Experimental Study on the Heat Transfer Performance of Pump-Assisted Capillary Phase-Change Loop
title_fullStr	Experimental Study on the Heat Transfer Performance of Pump-Assisted Capillary Phase-Change Loop
title_full_unstemmed	Experimental Study on the Heat Transfer Performance of Pump-Assisted Capillary Phase-Change Loop
title_sort	experimental study on the heat transfer performance of pump-assisted capillary phase-change loop
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/aaa62ea59a4a4e95b7205c985ca25627
work_keys_str_mv	AT xiaopingyang experimentalstudyontheheattransferperformanceofpumpassistedcapillaryphasechangeloop AT gaoxiangwang experimentalstudyontheheattransferperformanceofpumpassistedcapillaryphasechangeloop AT cancanzhang experimentalstudyontheheattransferperformanceofpumpassistedcapillaryphasechangeloop AT jieliu experimentalstudyontheheattransferperformanceofpumpassistedcapillaryphasechangeloop AT jinjiawei experimentalstudyontheheattransferperformanceofpumpassistedcapillaryphasechangeloop
_version_	1718413037070712832

Experimental Study on the Heat Transfer Performance of Pump-Assisted Capillary Phase-Change Loop

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