Journal
APPLIED ENERGY
Volume 202, Issue -, Pages 558-570Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2017.05.007
Keywords
Thermal storage; Design optimization; Numerical simulation; Annular fins
Categories
Funding
- National Natural Science Foundation of China [51506160]
- Natural Science Foundation of Shannxi [2014JZ2-002]
- China Post-doctoral Science Foundation [2015M580845, 2016T90916]
- Shaanxi Province Post Doctoral Science Foundation Project [2016BSHYDZZ54]
- Beijing Key Lab of Heating, Gas Supply, Ventilating and Air Conditioning Engineering [NR2015K08, NR2016K01]
- China Scholarship Council (CSC)
- Malardalen University, Sweden
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study conducts numerical investigations on melting process in a shell-and-tube latent heat thermal energy storage (LHTES) unit with annular fins. Commercial grade paraffin is employed as the phase change material (PCM) and water serves as the heat transfer fluid (HTF). Finite-volume-method (FVM) based numerical simulations are performed to investigate the effects of fin number, height and thickness on the phase change process. Particular attention is made to justify the contribution of local natural convection to the overall phase change process. Results demonstrate that the full melting time could be maximally reduced by 65% by inserting annular fins into PCM. For maximizing thermal performance, an optimal group fin parameter (fin number N = 31, thickness t/l = 0.0248 and interval I/L = 0.0313) is recommended for the present study. (C) 2017 Elsevier Ltd. All rights reserved.
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