Wang, H, Lin, G, Bai, L et al. (2 more authors) (2020) Comparative study of two loop heat pipes using R134a as the working fluid. Applied Thermal Engineering, 164. 114459. ISSN 1359-4311
Abstract
In order to promote future commercial applications of loop heat pipe (LHP) especially in the civil fields, environmentally friendly R134a is considered a good candidate working fluid to replace the commonly used anhydrous ammonia. In this work, two sets of LHPs with R134a as the working fluid were designed and fabricated, one with a nickel wick, and the other with a stainless steel wick. Their thermal performance, mainly including the startup, the power increment test, the thermal resistance and the heat transport capability, were experimentally studied, evaluated and compared. Based on the experimental results, it is found that both of the R134a LHPs present excellent startup performance, achieve a maximum heat transfer capacity greater than 100 W, and exhibit good response characteristics to stepwise change of heat load. The R134a LHP with a nickel wick shows good anti-gravity capability; however, the one with a stainless steel wick is quite sensitive to the adverse elevation. The physical mechanisms responsible for the experimental results mentioned above have been analyzed and discussed. This work contributes to a better understanding on the operating performance and characteristics of the R134a LHPs, providing good design guidance and reference for its future applications.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 Elsevier Ltd. All rights reserved. This is an author produced version of a paper published in Applied Thermal Engineering. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Loop heat pipe; R134a; Startup; Heat transfer; Thermal resistance |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 Jan 2020 10:45 |
Last Modified: | 27 Sep 2020 00:38 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.applthermaleng.2019.114459 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:155137 |
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