Publication de 6 numéros par an
ISSN Imprimer: 1940-2503
ISSN En ligne: 1940-2554
Indexed in
NUMERICAL ANALYSIS OF CONCENTRIC DOUBLE PIPE LATENT THERMAL ENERGY STORAGE UNIT USING TWO PHASE CHANGE MATERIALS FOR SOLAR WATER HEATING APPLICATIONS
RÉSUMÉ
This paper presents a numerical study based on the energy equations for the transient thermal behavior of a concentric double pipe latent thermal energy storage (LTES) unit for solar water heating applications. The annular space between tubes is filled with two paraffin wax phase change materials (PCMs), named PCM1 and PCM2. A heat transfer fluid (HTF: saturated water) flows through the inner tube and transfers the heat to the PCMs. Several numerical investigations were conducted in order to examine the effects of the HTF inlet temperatures on the variation of the temperature of PCM1 and PCM2, melting fraction, melting and solidification time, HTF outlet temperature, heat transfer rate, and total energy stored. Numerical results show that charging and discharging processes have three distinct periods for the change of PCMtemperature and melting fraction.When the temperature difference between the HTF inlet temperature and PCM increase, the variation of the temperature and melting fraction in different locations in the PCM increases considerably, and then the charging and discharging process is rapidly reached. The melting times of PCM1 and PCM2 decrease with an increase in the HTF inlet temperature. Moreover, the decreasing degree of their melting times is different. The present analysis provides theoretical guidance for designing optimization of a concentric double pipe LTES unit filled with two PCMs.
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Chibani Atef, Merouani Slimane, Benmoussa Fouzi, Computational analysis of the melting process of Phase change material-metal foam-based latent thermal energy storage unit: The heat exchanger configuration, Journal of Energy Storage, 42, 2021. Crossref
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Chibani Atef, Merouani Slimane, Acceleration of Heat Transfer and Melting Rate of a Phase Change Material by Nanoparticles Addition at Low Concentrations, International Journal of Thermophysics, 42, 5, 2021. Crossref