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Packed Bed Heat Storage: Continuum Mechanics Model and Validation

Knödler, Philipp and Dreißigacker, Volker and Zunft, Stefan (2016) Packed Bed Heat Storage: Continuum Mechanics Model and Validation. AIP Conference Proceedings (1734). American Institute of Physics (AIP). DOI: 10.1063/1.4949122 ISSN 0094-243X

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Official URL: Http://dx.doi.org/10.1063/1.4949122

Abstract

Thermal energy storage (TES) systems are key elements for various types of new power plant concepts. As possible cost-effective storage inventory option, packed beds of miscellaneous material come into consideration. However, high technical risks arise due to thermal expansion and shrinking of the packed bed’s particles during cyclic thermal operation, possibly leading to material failure. Therefore, suitable tools for designing the heat storage system are mandatory. While particle discrete models offer detailed simulation results, the computing time for large scale applications is inefficient. In contrast, continuous models offer time-efficient simulation results but are in need of effective packed bed parameters. This work focuses on providing insight into some basic methods and tools on how to obtain such parameters and on how they are implemented into a continuum model. In this context, a particle discrete model as well as a test rig for carrying out uniaxial compression tests (UCT) is introduced. Performing of experimental validation tests indicate good agreement with simulated UCT results. In this process, effective parameters required for a continuous packed bed model were identified and used for continuum simulation. This approach is validated by comparing the simulated results with experimental data from another test rig. The presented method significantly simplifies subsequent design studies.

Item URL in elib:https://elib.dlr.de/105823/
Document Type:Article
Title:Packed Bed Heat Storage: Continuum Mechanics Model and Validation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Knödler, Philippphilipp.knoedler (at) dlr.deUNSPECIFIED
Dreißigacker, Volkervolker.dreissigacker (at) dlr.deUNSPECIFIED
Zunft, Stefanstefan.zunft (at) dlr.deUNSPECIFIED
Date:2016
Journal or Publication Title:AIP Conference Proceedings
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.1063/1.4949122
Publisher:American Institute of Physics (AIP)
ISSN:0094-243X
Status:Published
Keywords:thermo-mechanics, packed bed, continuum model
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Thermal Energy Storage
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Thermochemical Processes (Storage) (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Knödler, Philipp
Deposited On:06 Sep 2016 11:32
Last Modified:31 Jul 2019 20:03

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