Experimental and Numerical Investigation of Combined Sensible/Latent Thermal Energy Storage for High-Temperature Applications
Keywords:Packed bed, Phase change material, Simulation, Thermal energy storage, Thermocline
AbstractCombined 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.
How to Cite
L. Geissbühler, S. Zavattoni, M. Barbato, G. Zanganeh, A. Haselbacher, A. Steinfeld, Chimia 2015, 69, 799, DOI: 10.2533/chimia.2015.799.
Copyright (c) 2015 Swiss Chemical Society
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.