Enhancement of latent heat energy storage using embedded heat pipes |
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| Authors: | Christopher W Robak Theodore L Bergman Amir Faghri |
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| Affiliation: | 1. Technology Centre, Spirax-Sarco Engineering Plc, Runnings Road, Cheltenham, Gloucester, GL51 9NQ, UK;2. Institute of Energy Future, RCUK Centre for Sustainable Energy Use in Food Chains (CSEF), College of Engineering, Design and Physical Sciences, Brunel University, London, UK;1. Department of Mechanical Engineering, University of Connecticut, 191 Auditorium Road, Storrs, CT 06269-3139, USA;2. Department of Mechanical Engineering, University of Kansas, Lawrence, KS 66045, USA;3. Sandia National Laboratories, Albuquerque, NM 87185, USA;1. Barbara Hardy Institute, University of South Australia, Mawson Lakes Boulevard, Mawson Lakes, South Australia 5095, Australia;2. Department of Chemical and Material Engineering, Sebha University, Libya;1. Energy Conservation and Renewable Energy Group, School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, PO Box 71, Bundoora, Victoria 3083, Australia;2. Department of Mechanical and Industrial Engineering, Zawia University, Libya;1. SAC Laboratory, SAC Business Unit, AE Division, LG Electronics Inc., 76, Seongsan-dong, Changwon, Gyeongnam 641-713, Republic of Korea;2. School of Aerospace and Mechanical Engineering, Korea Aerospace University, Goyang, Gyeonggi-do 412-791, Republic of Korea |
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| Abstract: | Latent heat thermal energy storage (LHTES) utilizing heat pipes or fins is investigated experimentally. Photographic observations, melting and solidification rates, and PCM energy storage quantities are reported. Heat pipe effectiveness is defined and used to quantify the relative performance of heat pipe-assisted and fin-assisted configurations to situations involving neither heat pipes nor fins. For the experimental conditions of this study, inclusion of heat pipes increases PCM melting rates by approximately 60%, while the fins are not as effective. During solidification, the heat pipe-assisted configuration transfers approximately twice the energy between a heat transfer fluid and the PCM, relative to both the fin-assisted LHTES and the non-heat pipe, non-fin configurations. |
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