INVESTIGATION OF HEAT STORAGE CHARACTERISTICS OF SOLAR RADIATION PACKED BED

Yue Chen; Gao Pengju; Xu Yang

doi:10.19912/j.0254-0096.tynxb.2021-0595

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (12) : 531-539. DOI: 10.19912/j.0254-0096.tynxb.2021-0595

INVESTIGATION OF HEAT STORAGE CHARACTERISTICS OF SOLAR RADIATION PACKED BED

Xu Yang, Yue Chen, Gao Pengju

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Abstract

A solar thermal energy collection unit and a packed bed thermal energy storage unit is integrated, and the effect of dynamic matching characteristics of solar thermal input unit and the heat storage unit on its overall energy utilization performance is studied. Based on the given dailysolar radiation curve, influences of the key parameters, including the HTF flow rate, the height-to-diameter ratio and the relative storage capacity on the overall thermal performance of the integrated solar energy system also are studied. The results show that the relationship between the total heat energy storage of packed bed and the inlet velocity of heat transfer fluid shows a nonlinear change. The maximal thermal energy is stored in the packed bed when the HTF mass flow rate uf is 0.006 m/s. Under the condition of u_f at 0.006 m/s and at the fixed PCM package, the optimal packed bed height-to-diameter ratio of 5 is achieved. With u_f of 0.006 m/s, the height-to-diameter ratio of 5, and the relative value of the filler amount is of 1, the maximal solar energy conversion efficiency is obtained in this research.

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packed bed / solar energy / phase change materials / energy storage

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Xu Yang, Yue Chen, Gao Pengju. INVESTIGATION OF HEAT STORAGE CHARACTERISTICS OF SOLAR RADIATION PACKED BED[J]. Acta Energiae Solaris Sinica. 2022, 43(12): 531-539 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0595

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