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Entropy generation analysis for the design improvement of a latent heat storage system

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  • Guelpa, Elisa
  • Sciacovelli, Adriano
  • Verda, Vittorio

Abstract

The aim of this work is to investigate design improvements of a shell-and-tube latent heat thermal energy storage unit using an approach based on the analysis of entropy generation. The study is conducted by means of a computational fluid-dynamic (CFD) model which takes into account phase change phenomenon by means of the enthalpy method. Thermal-fluid dynamic problem is solved both for the phase change material (PCM) and heat transfer fluid (HTF). The different contributions to the local entropy generation rate are computed and presented for both un-finned and finned systems. Fin arrangement is then modified according with the analysis of entropy generation distribution in order to increase the efficiency of the system. The results show that the improved system allows to reduce PCM solidification time and increase Second-law efficiency.

Suggested Citation

  • Guelpa, Elisa & Sciacovelli, Adriano & Verda, Vittorio, 2013. "Entropy generation analysis for the design improvement of a latent heat storage system," Energy, Elsevier, vol. 53(C), pages 128-138.
    • Handle: RePEc:eee:energy:v:53:y:2013:i:c:p:128-138
    DOI: 10.1016/j.energy.2013.02.017
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    References listed on IDEAS

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