{"title":"Heat transfer enhancement of three-dimensional oscillating heat pipe based on evaporation surface hydrophilicity regulation for thermal management","authors":"Kaibao Liu, Zeyu Xu, Guotao Meng, Haolin Gan, Changhui Liu, Jiateng Zhao","doi":"10.1016/j.ijheatmasstransfer.2024.125911","DOIUrl":null,"url":null,"abstract":"<div><p>To improve the thermal management performance of high heat flux components in confined spaces, two three-dimensional oscillating heat pipes (3D-OHPs) with different adiabatic section lengths were designed in this work. 3D-OHPs with surfaces of different hydrophilicity was fabricated using alkaline-assisted oxidation technology, and the impact of surface hydrophilicity on the heat transfer performance of 3D-OHPs was investigated experimentally. The results indicated that the greater the hydrophilicity of the 3D-OHP, the better its start-up and heat transfer performance. A 3D-OHP with a shorter adiabatic section demonstrates slightly inferior start-up performance under identical hydrophilicity conditions but exhibits better overall heat transfer performance. It is also found that the 3D-OHP can initiate at 20 W under four distinct hydrophilicity conditions. Compared to the untreated 3D-OHP, the super-hydrophilic 3D-OHP reduces start-up temperature by 17.76 % and start-up time by 35.31 %. Under high-power conditions, the super-hydrophilic 3D-OHP exhibits a 37.6 % increase in thermal conductivity and a 61.5 % improvement in temperature uniformity compared to the untreated 3D-OHP. Furthermore, the thermal resistance and evaporation section temperature of the super-hydrophilic 3D-OHP are reduced by 56.69 % and 14.33 %, respectively. This study can broaden the approach to enhance the heat transfer performance of 3D-OHP and provide more application scenarios for the thermal management of power devices.</p></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":null,"pages":null},"PeriodicalIF":5.0000,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Heat and Mass Transfer","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0017931024007427","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
To improve the thermal management performance of high heat flux components in confined spaces, two three-dimensional oscillating heat pipes (3D-OHPs) with different adiabatic section lengths were designed in this work. 3D-OHPs with surfaces of different hydrophilicity was fabricated using alkaline-assisted oxidation technology, and the impact of surface hydrophilicity on the heat transfer performance of 3D-OHPs was investigated experimentally. The results indicated that the greater the hydrophilicity of the 3D-OHP, the better its start-up and heat transfer performance. A 3D-OHP with a shorter adiabatic section demonstrates slightly inferior start-up performance under identical hydrophilicity conditions but exhibits better overall heat transfer performance. It is also found that the 3D-OHP can initiate at 20 W under four distinct hydrophilicity conditions. Compared to the untreated 3D-OHP, the super-hydrophilic 3D-OHP reduces start-up temperature by 17.76 % and start-up time by 35.31 %. Under high-power conditions, the super-hydrophilic 3D-OHP exhibits a 37.6 % increase in thermal conductivity and a 61.5 % improvement in temperature uniformity compared to the untreated 3D-OHP. Furthermore, the thermal resistance and evaporation section temperature of the super-hydrophilic 3D-OHP are reduced by 56.69 % and 14.33 %, respectively. This study can broaden the approach to enhance the heat transfer performance of 3D-OHP and provide more application scenarios for the thermal management of power devices.
期刊介绍:
International Journal of Heat and Mass Transfer is the vehicle for the exchange of basic ideas in heat and mass transfer between research workers and engineers throughout the world. It focuses on both analytical and experimental research, with an emphasis on contributions which increase the basic understanding of transfer processes and their application to engineering problems.
Topics include:
-New methods of measuring and/or correlating transport-property data
-Energy engineering
-Environmental applications of heat and/or mass transfer