Title: FP-TES: A Fluidisation-Based Particle Thermal Energy Storage, Part I: Numerical Investigations and Bulk Heat Conductivity
Authors: Wünsch, David 
Sulzgruber, Verena 
Haider, Markus 
Walter, Heimo 
Category: Original Research Article
Issue Date: 19-Aug-2020
Citation: 
Wünsch, D., Sulzgruber, V., Haider, M., & Walter, H. (2020). FP-TES: A Fluidisation-Based Particle Thermal Energy Storage, Part I: Numerical Investigations and Bulk Heat Conductivity. Energies, 13(17), 1–20. https://doi.org/10.3390/en13174298
Journal: Energies 
ISSN: 1996-1073
Abstract: 
Renewables should become more continuously available, reliable and cost-efficient to manage the challenges caused by the energy transition. Thus, analytic and numerical investigations for the layout of a pilot plant of a concept called Fluidisation-Based Particle Thermal Energy Storage (FP-TES)-a highly flexible, short- to long-term fluidised bed regenerative heat storage utilising a pressure gradient for hot powder transport, and thus enabling minimal losses, high energy densities, compact construction and countercurrent heat exchange-are presented in this article. Such devices in decentralised set-up-being included in energy- and especially heat-intensive industries, storing latent or sensible heat or power-to-heat to minimise losses and compensate fluctuations-can help to achieve the above-stated goals. Part I of this article is focused on geometrical and fluidic design via numerical investigations utilising Computational Particle Fluid Dynamics (CPFD). In the process a controlled transient simulation method called co-simulation of FP-TES is developed forming the basis for test bench design and execution of further co-simulation. Within this process an advanced design of rotational symmetric hoppers with additional baffles in the heat exchanger (HEX) and internal pipes to stabilise the particle mass flow is developed. Moreover, a contribution bulk heat conductivity is presented to demonstrate low thermal losses and limited needs for thermal insulation by taking into account the thermal insulation of the outer layer of the hopper.
Keywords: fluidised bed heat exchanger; fluidised bed technology; numerical investigation; particle transport; thermal energy storage (TES)
DOI: 10.3390/en13174298
Organisation: E302-01 - Forschungsbereich Thermodynamik und Wärmetechnik 
License: CC BY 4.0 CC BY 4.0
Publication Type: Article
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