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Experimental and theoretical study of a novel loop heat pipe
Key Laboratory of Refrigeration Technology of Tianjin, Tianjin University of Commerce, 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.
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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2018 (English)In: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 130, 354-362 p.Article in journal (Refereed) Published
Abstract [en]

In order to reduce the heat leakage from the evaporator and achieve a longer transport distance, a new type of loop heat pipe (LHP) has been proposed based on a hypothesis that the circulation of working fluids is driven by not only the capillary head, but also the pressure head due to evaporation. In the evaporator, the wick is separated from the heating surface by a chamber, which can effectively use the pressure head generated by evaporation. In this work, a prototype of such a LHP was studied experimentally and theoretically. In order to understand the mechanism of operation, a new mathematical model was established. Comparing the simulated results with the experimental data about the operation temperature, a good agreement was observed that the average absolute deviation and the maximum absolute deviation were in ranges of 0.67–1.21 °C and −1.3 to 6 °C, respectively. With the validated model, the two driving forces were investigated. Results showed that the ratio of the pressure head of evaporation to the capillary head was in a range of 59–54% corresponding to heating powers from 30 W to 110 W. It confirms that the pressure head due to evaporation plays an important role in the circulation of working fluids.

Place, publisher, year, edition, pages
Elsevier Ltd , 2018. Vol. 130, 354-362 p.
Keyword [en]
Driving force, Evaporation chamber, Loop heat pipe, Mathematical model, Thermal resistance, Evaporation, Evaporators, Fluids, Heat resistance, Mathematical models, Transport properties, Average absolute deviation, Driving forces, Evaporation chambers, Maximum absolute deviations, New mathematical model, Operation temperature, Transport distances, Heat pipes
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-37527DOI: 10.1016/j.applthermaleng.2017.11.020Scopus ID: 2-s2.0-85036653219OAI: oai:DiVA.org:mdh-37527DiVA: diva2:1169056
Available from: 2017-12-22 Created: 2017-12-22 Last updated: 2017-12-22Bibliographically approved

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Li, Hailong

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