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Experimental Investigation on a Moving Bed Heat Exchanger used for discharge of a particle-based TES for CSP

Baumann, Torsten and Zunft, Stefan (2014) Experimental Investigation on a Moving Bed Heat Exchanger used for discharge of a particle-based TES for CSP. In: Eurotherm Seminar #99 - Advances in Themal Energy Storage. Eurotherm Seminar #99, 28.05.-30.05.2014, Lleida, Spanien. ISBN 978 84 697 0467 7

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Abstract

A newly developed moving bed heat exchanger (MBHX) for heat recovery from particle-based thermal energy storage (TES) was experimentally investigated. Centered towards solar thermal power applications, a performance assessment of a prototype was carried out with a detailed look on the granular flow behavior as well as its overall thermal efficiency. Additionally, the experimental results were compared to simulation results obtained from a numerical multiphase approach. The geometrical arrangement of the heat exchanger tubes is found to be a key parameter to performance improvements. The shape and size of stagnant zones developing on top of each tube was found to be influenced by the tube pitch and affects the velocity distribution and thus the heat transfer. Heat transfer coefficients up to 250 W/m²K were realized for high inlet velocities of sintered bauxite as granular medium. A good agreement with computational results was achieved for superficial granular velocities up to 2 mm/s.

Item URL in elib:https://elib.dlr.de/89232/
Document Type:Conference or Workshop Item (Poster)
Title:Experimental Investigation on a Moving Bed Heat Exchanger used for discharge of a particle-based TES for CSP
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Baumann, Torstentorsten.baumann (at) dlr.deUNSPECIFIED
Zunft, Stefanstefan.zunft (at) dlr.deUNSPECIFIED
Date:2014
Journal or Publication Title:Eurotherm Seminar #99 - Advances in Themal Energy Storage
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
ISBN:978 84 697 0467 7
Status:Published
Keywords:CSP, TES, Moving Bed, Heat Exchanger, granular flow
Event Title:Eurotherm Seminar #99
Event Location:Lleida, Spanien
Event Type:international Conference
Event Dates:28.05.-30.05.2014
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Energy-efficient Processes (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Thermochemische Prozesse (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Baumann, Dr.Ing. Torsten
Deposited On:11 Jun 2014 09:55
Last Modified:11 Jun 2014 09:55

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