{"title":"Experimental investigation of the thermo-hydraulic performance of a stacked flat plate oscillating heat pipe","authors":"M. Abdelnabi, D. Ewing, C.Y. Ching","doi":"10.1016/j.tsep.2025.103355","DOIUrl":null,"url":null,"abstract":"<div><div>A stacked double-layer flat plate oscillating heat pipe charged with degassed DI water was designed, fabricated, and characterized under different operating conditions (orientation, cooling water or system temperature and heat load). The oscillating heat pipe was designed to dissipate 500 W within a footprint of 170 mm x 100 mm. The oscillating heat pipe had a total of 46 channels (23 channels per layer) with a hydraulic diameter of 2 mm. Tests were performed to characterize the performance of the oscillating heat pipe for axial heat transfer. The stacked oscillating heat pipe showed a distinctive feature in that it overcame the absence of the gravity effect when operated in a horizontal orientation. The thermal performance was found to be greatly dependent on the operational parameters. The oscillating heat pipe was able to dissipate a heat load greater than 500 W without any indication of dry-out. An increase in the cooling water temperature enhanced the performance and was accompanied with an increase in the on/off oscillation ratio. The lowest thermal resistance of 0.06 K/W was achieved at 500 W with a 50 °C cooling water temperature, with a corresponding evaporator heat transfer coefficient of 0.78 W/cm<sup>2</sup>K.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"59 ","pages":"Article 103355"},"PeriodicalIF":5.4000,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thermal Science and Engineering Progress","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2451904925001453","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/2/6 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
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Abstract
A stacked double-layer flat plate oscillating heat pipe charged with degassed DI water was designed, fabricated, and characterized under different operating conditions (orientation, cooling water or system temperature and heat load). The oscillating heat pipe was designed to dissipate 500 W within a footprint of 170 mm x 100 mm. The oscillating heat pipe had a total of 46 channels (23 channels per layer) with a hydraulic diameter of 2 mm. Tests were performed to characterize the performance of the oscillating heat pipe for axial heat transfer. The stacked oscillating heat pipe showed a distinctive feature in that it overcame the absence of the gravity effect when operated in a horizontal orientation. The thermal performance was found to be greatly dependent on the operational parameters. The oscillating heat pipe was able to dissipate a heat load greater than 500 W without any indication of dry-out. An increase in the cooling water temperature enhanced the performance and was accompanied with an increase in the on/off oscillation ratio. The lowest thermal resistance of 0.06 K/W was achieved at 500 W with a 50 °C cooling water temperature, with a corresponding evaporator heat transfer coefficient of 0.78 W/cm2K.
设计、制作了双层平板振荡热管，并对其在不同工况（方向、冷却水或系统温度、热负荷）下的性能进行了表征。振荡热管被设计为在170 mm x 100 mm的占地面积内耗散500 W。振荡热管共有46个通道（每层23个通道），液压直径为2mm。对振荡热管轴向传热性能进行了试验研究。叠置振荡热管克服了在水平方向上运行时没有重力效应的特点。热性能在很大程度上取决于操作参数。振荡热管能够消散大于500w的热负荷而没有任何干燥的迹象。冷却水温度的升高提高了性能，并伴随着开关振荡比的增加。在冷却水温度为50℃、温度为500 W时，蒸发器换热系数为0.78 W/cm2K，最低热阻为0.06 K/W。
期刊介绍：
Thermal Science and Engineering Progress (TSEP) publishes original, high-quality research articles that span activities ranging from fundamental scientific research and discussion of the more controversial thermodynamic theories, to developments in thermal engineering that are in many instances examples of the way scientists and engineers are addressing the challenges facing a growing population – smart cities and global warming – maximising thermodynamic efficiencies and minimising all heat losses. It is intended that these will be of current relevance and interest to industry, academia and other practitioners. It is evident that many specialised journals in thermal and, to some extent, in fluid disciplines tend to focus on topics that can be classified as fundamental in nature, or are ‘applied’ and near-market. Thermal Science and Engineering Progress will bridge the gap between these two areas, allowing authors to make an easy choice, should they or a journal editor feel that their papers are ‘out of scope’ when considering other journals. The range of topics covered by Thermal Science and Engineering Progress addresses the rapid rate of development being made in thermal transfer processes as they affect traditional fields, and important growth in the topical research areas of aerospace, thermal biological and medical systems, electronics and nano-technologies, renewable energy systems, food production (including agriculture), and the need to minimise man-made thermal impacts on climate change. Review articles on appropriate topics for TSEP are encouraged, although until TSEP is fully established, these will be limited in number. Before submitting such articles, please contact one of the Editors, or a member of the Editorial Advisory Board with an outline of your proposal and your expertise in the area of your review.
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