Journal
ENERGY AND BUILDINGS
Volume 79, Issue -, Pages 143-154Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.enbuild.2014.04.051
Keywords
Loop heat pipe; SWH; Technical background; Engineering application
Funding
- Natural Science Foundation of Guangdong Province, China [S2013010011674, S201301003536]
- China Postdoctoral Science Foundation [2012M521576, 2013T60790]
- Doctoral Foundation, Guangdong University of Technology [12ZK0380]
- Guangdong Provincial Science and Technology Program for International Cooperation Projects [2011B050400032]
- Science and Technology Planning Project for The Ministry of Housing and Urban-Rural Development [2011-k1-28]
- Science and Technology Planning Project for Panyu District, Guangzhou City [2011-Z-01-37]
- State Key Laboratory of Subtropical Building Science, South China University of Technology [2011KB22]
- Building Energy-Saving and Application Technology Key Laboratory, Guangdong Province [2011048]
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In this paper, a comprehensive review on the loop heat pipe (LHP) for use in solar water heating (SWH) will be carried out. LHP is an efficient heat transfer device that could transport thermal energy over long distances, up to several tens of meters. It has some unique features over conventional heat pipe, e.g., gravity-unaffected and flexibility in its design and installation, which makes LHP particularly suitable for applications in SWHs. A significant literature review of the LHP technology will be illustrated, and the review results will be analyzed in terms of the performance characteristics and research methodology. For the performance characteristics, the steady-state and transient behavior of the LHP device will be examined. The research methods, i.e., theoretical analyses and computer simulations, and experimental investigations, will be analyzed. Although substantial work has been done in LHP studies, the opportunities for further work will be identified. This review will help recognize the problems remaining in the existing SWHs, remove the barriers to solar applications, identify new research subjects to improve the performance of the SWHs, expand solar thermal market potential throughout the world and broaden the application of LHP in solar water heating. (C) 2014 Elsevier B.V. All rights reserved.
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