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Thermo-Mechanical Analysis of a Silicon Carbide Honeycomb Component Applied as an Absorber for Concentrated Solar Radiation

Fend, Thomas and Smirnova, Olena and Schwarzbözl, Peter and Schmücker, Martin and Flucht, Ferdinand and Dathe, Sven (2015) Thermo-Mechanical Analysis of a Silicon Carbide Honeycomb Component Applied as an Absorber for Concentrated Solar Radiation. In: Proceedings of the 11th International Conference on Ceramic Materials and Components for Energy and Environmental Applications. The American Ceramic Sosiety. 11th International Conference on Ceramic Materials and Components for Energy and Environmental Applications, 14.-19. Jun. 2015, Vancouver, Canada.

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Abstract

The study focuses on a numerical model describing the thermo-mechanical processes in an open volumetric solar absorber. In this application thermal loads of up to 850 kW/m² induce mechanical stresses inside the volume of the component. The objective of the study is to identify critical thermal load cases which may especially occur during start-up or shut down cases as well as during the transition of clouds. The study can be subdivided into three major parts. In a first step, the mechanical strength of the investigated materials has been determined in double-ring, three or four-point bending tests. In a subsequent numerical stress analysis the maximum stresses in the walls of the honeycomb structure at fracture load have been determined. The results of this combined experimental/numerical approach have been compared with the strength properties of dense materials. In a second step various transient and stationary load cases were considered and the corresponding temperature distributions were calculated. Thirdly, the thermo-mechanical model was used to determine the stress distributions which have been induced. Special attention was paid on the influence of the macro geometry and cell-density. The results of the study allow important conclusions for the operation of the receiver.

Item URL in elib:https://elib.dlr.de/97474/
Document Type:Conference or Workshop Item (Speech)
Title:Thermo-Mechanical Analysis of a Silicon Carbide Honeycomb Component Applied as an Absorber for Concentrated Solar Radiation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fend, Thomasthomas.fend (at) dlr.deUNSPECIFIED
Smirnova, Olenaolena.smirnova (at) dlr.deUNSPECIFIED
Schwarzbözl, Peterpeter.schwarzboezl (at) dlr.deUNSPECIFIED
Schmücker, MartinMartin.Schmuecker (at) dlr.deUNSPECIFIED
Flucht, Ferdinandferdinand.flucht (at) dlr.deUNSPECIFIED
Dathe, Svensven.dathe (at) dlr.deUNSPECIFIED
Date:2015
Journal or Publication Title:Proceedings of the 11th International Conference on Ceramic Materials and Components for Energy and Environmental Applications
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Publisher:The American Ceramic Sosiety
Status:Published
Keywords:solar tower techology, volumetric solar absorber, thermo-mechanical stress
Event Title:11th International Conference on Ceramic Materials and Components for Energy and Environmental Applications
Event Location:Vancouver, Canada
Event Type:international Conference
Event Dates:14.-19. Jun. 2015
Organizer:American Ceramic Society
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Systems (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Solar Process Technology (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research
Institute of Solar Research > Großanlagen und solare Materialien
Deposited By: Smirnova, Olena
Deposited On:03 Aug 2015 09:12
Last Modified:31 Jul 2019 19:54

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