![Figure 2: (a) heat transfer coefficient of a fluidized bed (silica sand) [1], (b) minimum fluidization velocity for various silica-sand particle sizes (based on the Wen & Yu correlation)](https://www.researchgate.net/publication/275533695/figure/fig2/AS:669964197449749@1536743320680/a-heat-transfer-coefficient-of-a-fluidized-bed-silica-sand-1-b-minimum_Q320.jpg)
December 2014
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2,110 Reads
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28 Citations
Energy Procedia
An active fluidization thermal energy storage (TES) called “sandTES” is presented. System design, the fundamental features and challenges of fluidization stability such as mass flux uniformity, powder transport and heat transfer, as well as auxiliary power minimization are thoroughly discussed. The tools and methods for evaluating or simulating the behavior of the fluidized bed heat exchanger (HEX) and the dense particle flow within it are explained along with criteria for the selection of storage powders.