Quasi-steady state temperature distribution and numerical simulation on low Ste number latent heat storage thermal unit of solar thermal power generation
التفاصيل البيبلوغرافية
العنوان:
Quasi-steady state temperature distribution and numerical simulation on low Ste number latent heat storage thermal unit of solar thermal power generation
Solar thermal power generation systems, including direct steam generation, require isothermal energy storage systems for a saturation temperature range between 190° C and 310° C. One option to fulfill this requirement is the application of phase‐change materials to absorb or release energy. In this paper, the basic concept of latent heat storage system is described, and a model of phase‐change heat transfer of latent heat storage thermal unit for thermal energy storage system is built. Base on the practical thermo‐physical properties of phase‐change materials, Quasi‐Steady State temperature distribution of phase‐change heat transfer is analyzed under low Ste number. Numerical simulation (finite element method) taking account into the sensible heat is adopted and the results prove that the Quasi‐Steady State temperature distribution obtained from theoretical is in good agreement with the results of numerical simulation. For a latent heat storage system with low Ste number characteristic, Quasi‐Steady State solution can be used as the theoretical calculation foundation for engineering design.
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