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Performance comparison regarding loop heat pipes with different evaporator structures
School of Environmental Science and Engineering, Tianjin University, Tianjin, China.
School of Environmental Science and Engineering, Tianjin University, Tianjin, China.
Mälardalen University, School of Business, Society and Engineering, Future Energy Center. Key Laboratory of Refrigeration Technology of Tianjin, Tianjin University of Commerce, Tianjin, China.ORCID iD: 0000-0002-6279-4446
Key Laboratory of Refrigeration Technology of Tianjin, Tianjin University of Commerce, Tianjin, China.
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2019 (English)In: International journal of thermal sciences, ISSN 1290-0729, E-ISSN 1778-4166, Vol. 136, p. 86-95Article in journal (Refereed) Published
Abstract [en]

The design of evaporator can clearly affect the performance of loop heat pipes (LHPs). In order to understand the influence, three different designs of evaporators were compared, including embedding vapor channels on the heating surface (Config_1), embedding vapor channels in the wick (Config_2), and separating the wick from the heating surface (Config_3). Based on the validated model, the operating temperature, the start-up time, and the transport distance, as key performance indicators, were studied. Results show that, to improve the performance of LHP, it is of importance to reduce the contacting area between the wick and the heating surface. Due to the existence of the steam chamber, the wick was separated from the heating surface in Config_3, resulting in the lowest operating temperature and the shortest start-up time. The pressure head of evaporation is also an important component of the driving force. For Config_3, since the evaporation happened in the steam chamber rather than in the wick, it had a longer transport distance than Config_1 and Config_2 at the same heat load.

Place, publisher, year, edition, pages
Elsevier Masson SAS , 2019. Vol. 136, p. 86-95
Keywords [en]
Driving force, Loop heat pipe, Operating temperature, Performance comparison, Transport distance, Benchmarking, Evaporation, Evaporators, Heating, Temperature, Driving forces, Transport distances, Heat pipes
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-41229DOI: 10.1016/j.ijthermalsci.2018.09.029ISI: 000467003100009Scopus ID: 2-s2.0-85054815675OAI: oai:DiVA.org:mdh-41229DiVA, id: diva2:1258934
Available from: 2018-10-26 Created: 2018-10-26 Last updated: 2019-06-05Bibliographically approved

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Li, Hailong

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