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An analysis of a packed bed latent heat thermal energy storage system using PCM capsules: Numerical investigation

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  • Felix Regin, A.
  • Solanki, S.C.
  • Saini, J.S.

Abstract

This paper is aimed at analyzing the behavior of a packed bed latent heat thermal energy storage system. The packed bed is composed of spherical capsules filled with paraffin wax as PCM usable with a solar water heating system. The model developed in this study uses the fundamental equations similar to those of Schumann, except that the phase change phenomena of PCM inside the capsules are analyzed by using enthalpy method. The equations are numerically solved, and the results obtained are used for the thermal performance analysis of both charging and discharging processes. The effects of the inlet heat transfer fluid temperature (Stefan number), mass flow rate and phase change temperature range on the thermal performance of the capsules of various radii have been investigated. The results indicate that for the proper modeling of performance of the system the phase change temperature range of the PCM must be accurately known, and should be taken into account.

Suggested Citation

  • Felix Regin, A. & Solanki, S.C. & Saini, J.S., 2009. "An analysis of a packed bed latent heat thermal energy storage system using PCM capsules: Numerical investigation," Renewable Energy, Elsevier, vol. 34(7), pages 1765-1773.
    • Handle: RePEc:eee:renene:v:34:y:2009:i:7:p:1765-1773
    DOI: 10.1016/j.renene.2008.12.012
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    References listed on IDEAS

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    1. Regin, A. Felix & Solanki, S.C. & Saini, J.S., 2008. "Heat transfer characteristics of thermal energy storage system using PCM capsules: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 12(9), pages 2438-2458, December.
    2. Regin, A. Felix & Solanki, S.C. & Saini, J.S., 2006. "Latent heat thermal energy storage using cylindrical capsule: Numerical and experimental investigations," Renewable Energy, Elsevier, vol. 31(13), pages 2025-2041.
    3. Gonçalves, L.C.C. & Probert, S.D., 1993. "Thermal-energy storage: Dynamic performance characteristics of cans each containing a phase-change material, assembled as a packed-bed," Applied Energy, Elsevier, vol. 45(2), pages 117-155.
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