Model prediction of the critical heat flux and thermal resistance of a rectangular thin-strip evaporator with distributed liquid supply capillary wicks for high heat flux cooling

The heat transfer performance characteristics, mainly the upper limit of heat flux and the overall thermal resistance, of two-phase liquid-vapor-based heat spreaders primarily developed for concentrated-heat dissipation in microelectronics are dependent, predominantly, on the thickness and particle...

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Autor principal:	Munonyedi Egbo
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Critical heat flux Thermal resistance Thermal modeling Wick Phase-change cooling Heat transfer Heat QC251-338.5
Acceso en línea:	https://doaj.org/article/7638c0b775094c029280dc0aa387d231
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spelling	oai:doaj.org-article:7638c0b775094c029280dc0aa387d2312021-11-28T04:38:36ZModel prediction of the critical heat flux and thermal resistance of a rectangular thin-strip evaporator with distributed liquid supply capillary wicks for high heat flux cooling2666-202710.1016/j.ijft.2021.100125https://doaj.org/article/7638c0b775094c029280dc0aa387d2312021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666202721000628https://doaj.org/toc/2666-2027The heat transfer performance characteristics, mainly the upper limit of heat flux and the overall thermal resistance, of two-phase liquid-vapor-based heat spreaders primarily developed for concentrated-heat dissipation in microelectronics are dependent, predominantly, on the thickness and particle size of the evaporation wick as well as on the distribution of the high-permeable liquid supply channels, also known as arteries. In this study we develop a heat and mass transfer (thermal-hydraulic) model to predict the critical heat flux and the overall thermal resistance of a novel wick with rectangular thin-strip evaporator (with a large length-to-thickness ratio, L/t ≥ 3.5), with distributed liquid supply capillary wicks in a downward-facing orientation, each made of sintered copper particles, for microgravity applications. The liquid supply capillary wicks are made of 350-μm-diameter particle sizes. With the thermal-hydraulic model, we predict the CHF and overall thermal resistance for three evaporation wick particle sizes, i.e., 30, 60, and 100 μm, monolayer each, and show that both performance characteristics are primarily controlled by the hydraulic properties of the evaporation wick. The predicted CHF and minimum thermal resistance are 275 (12.3 °C superheat) and 0.045 K/(W/cm2), 599 (56.7 °C superheat) and 0.095 K/(W/cm2), and 655 W/cm2 (114.4 °C superheat) and 0.175 K/(W/cm2), for the 30, 60, and 100 μm particles, respectively. Finally, we compare the results of the present work with some of the existing numerical and experimental data for different thin wick designs found in the literature.Munonyedi EgboElsevierarticleCritical heat fluxThermal resistanceThermal modelingWickPhase-change coolingHeat transferHeatQC251-338.5ENInternational Journal of Thermofluids, Vol 12, Iss , Pp 100125- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Critical heat flux Thermal resistance Thermal modeling Wick Phase-change cooling Heat transfer Heat QC251-338.5
spellingShingle	Critical heat flux Thermal resistance Thermal modeling Wick Phase-change cooling Heat transfer Heat QC251-338.5 Munonyedi Egbo Model prediction of the critical heat flux and thermal resistance of a rectangular thin-strip evaporator with distributed liquid supply capillary wicks for high heat flux cooling
description	The heat transfer performance characteristics, mainly the upper limit of heat flux and the overall thermal resistance, of two-phase liquid-vapor-based heat spreaders primarily developed for concentrated-heat dissipation in microelectronics are dependent, predominantly, on the thickness and particle size of the evaporation wick as well as on the distribution of the high-permeable liquid supply channels, also known as arteries. In this study we develop a heat and mass transfer (thermal-hydraulic) model to predict the critical heat flux and the overall thermal resistance of a novel wick with rectangular thin-strip evaporator (with a large length-to-thickness ratio, L/t ≥ 3.5), with distributed liquid supply capillary wicks in a downward-facing orientation, each made of sintered copper particles, for microgravity applications. The liquid supply capillary wicks are made of 350-μm-diameter particle sizes. With the thermal-hydraulic model, we predict the CHF and overall thermal resistance for three evaporation wick particle sizes, i.e., 30, 60, and 100 μm, monolayer each, and show that both performance characteristics are primarily controlled by the hydraulic properties of the evaporation wick. The predicted CHF and minimum thermal resistance are 275 (12.3 °C superheat) and 0.045 K/(W/cm2), 599 (56.7 °C superheat) and 0.095 K/(W/cm2), and 655 W/cm2 (114.4 °C superheat) and 0.175 K/(W/cm2), for the 30, 60, and 100 μm particles, respectively. Finally, we compare the results of the present work with some of the existing numerical and experimental data for different thin wick designs found in the literature.
format	article
author	Munonyedi Egbo
author_facet	Munonyedi Egbo
author_sort	Munonyedi Egbo
title	Model prediction of the critical heat flux and thermal resistance of a rectangular thin-strip evaporator with distributed liquid supply capillary wicks for high heat flux cooling
title_short	Model prediction of the critical heat flux and thermal resistance of a rectangular thin-strip evaporator with distributed liquid supply capillary wicks for high heat flux cooling
title_full	Model prediction of the critical heat flux and thermal resistance of a rectangular thin-strip evaporator with distributed liquid supply capillary wicks for high heat flux cooling
title_fullStr	Model prediction of the critical heat flux and thermal resistance of a rectangular thin-strip evaporator with distributed liquid supply capillary wicks for high heat flux cooling
title_full_unstemmed	Model prediction of the critical heat flux and thermal resistance of a rectangular thin-strip evaporator with distributed liquid supply capillary wicks for high heat flux cooling
title_sort	model prediction of the critical heat flux and thermal resistance of a rectangular thin-strip evaporator with distributed liquid supply capillary wicks for high heat flux cooling
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/7638c0b775094c029280dc0aa387d231
work_keys_str_mv	AT munonyediegbo modelpredictionofthecriticalheatfluxandthermalresistanceofarectangularthinstripevaporatorwithdistributedliquidsupplycapillarywicksforhighheatfluxcooling
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Model prediction of the critical heat flux and thermal resistance of a rectangular thin-strip evaporator with distributed liquid supply capillary wicks for high heat flux cooling

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