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Development and tests of loop heat pipe with multi-layer metal foams as wick structure

Title
Development and tests of loop heat pipe with multi-layer metal foams as wick structure
Author
Hui, Kwan-San
Keywords
Loop heat pipe; Metal foam; Wick structure; Start-up time; Thermal resistance
Issue Date
2016-02
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
APPLIED THERMAL ENGINEERING, v. 94, Page. 324-330
Abstract
A plate-type loop heat pipe (LHP) with multi-layer metal foams as wick structure was fabricated. In the LHP, the multi-layer metal foams and vapor channels with high depth-to-width ratios were integrated into a flat evaporator, which is beneficial for cycling the working fluid and enhancing the evaporation process. Subsequently, the operational parameters, such as the types of working fluid inventory, wick material and heat load with ethanol as the working fluid, were varied to investigate the effect on the heat transfer performance of LHP. The experimental results show that obvious three stages were observed in the start-up and running process of the LHP including the rising temperature stage, start-up stage and steady running stage. In the fluid inventory range of 20 similar to 60 ml, it is found that 40 ml of ethanol was the optimized working fluid inventory for the designed LHP. Compared to the nickel foam, the LHP with multi-layer copper foams with wick structure showed better performance with different heat loads because of the higher thermal conductivity and smaller pore size. (C) 2015 Elsevier Ltd. All rights reserved,
URI
http://www.sciencedirect.com/science/article/pii/S1359431115011321?via%3Dihubhttp://hdl.handle.net/20.500.11754/33930
ISSN
1359-4311
DOI
10.1016/j.applthermaleng.2015.10.085
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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