Experimental and Numerical Investigation of Combined Sensible/Latent Thermal Energy Storage for High-Temperature Applications
DOI:
https://doi.org/10.2533/chimia.2015.799Keywords:
Packed bed, Phase change material, Simulation, Thermal energy storage, ThermoclineAbstract
Combined sensible/latent heat storage allows the heat-transfer fluid outflow temperature during discharging to be stabilized. A lab-scale combined storage consisting of a packed bed of rocks and steel-encapsulated AlSi12 was investigated experimentally and numerically. Due to the small tank-to-particle diameter ratio of the lab-scale storage, void-fraction variations were not negligible, leading to channeling effects that cannot be resolved in 1D heat-transfer models. The void-fraction variations and channeling effects can be resolved in 2D models of the flow and heat transfer in the storage. The resulting so-called bypass fraction extracted from the 2D model was used in the 1D model and led to good agreement with experimental measurements.Downloads
Published
2015-12-16
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Scientific Articles
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Copyright (c) 2015 Swiss Chemical Society
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How to Cite
[1]
L. Geissbühler, S. Zavattoni, M. Barbato, G. Zanganeh, A. Haselbacher, A. Steinfeld, Chimia 2015, 69, 799, DOI: 10.2533/chimia.2015.799.