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Mechanical coupling behavior of a dish-Stirling receiver: Influence on the absorber tube stresses
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.ORCID iD: 0000-0003-1792-0551
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
2019 (English)In: AIP Conference Proceedings, American Institute of Physics (AIP), 2019, Vol. 2126, article id 050003Conference paper, Published paper (Refereed)
Abstract [en]

The solar receiver tubes work under the highest temperatures and heat flux conditions, being their thermo-mechanical design critical to assure a safe and durable operation. Finite Element Analyses are traditionally utilized to assess the stresses for lifetime calculations. However, the real boundary conditions for these analyses are not well known yet. Thereby, this paper presents an experimental and numerical study to determine more realistic boundary conditions. Firstly, four deflection measurements are measured simultaneously by high-accuracy laser meters. Secondly, three types of boundary conditions are simulated trying to fit the experimental deflections: fixed, elastic and remote displacement. Finally, the stresses at critical regions are compared for each simulation. The results show that, unlike fixed support, remote displacement boundary conditions can obtain realistic deflection results but must be re-adjusted for each specific support, and elastic support fails to capture the manifold rotations. Using remote displacement stress results as reference for the case under study, fixed support leads to deviations in the stresses of at least 50% whilst elastic support can provide some similar stress results.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2019. Vol. 2126, article id 050003
Series
AIP Conference Proceedings, ISSN 0094-243X ; 2126
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:kth:diva-262569DOI: 10.1063/1.5117586Scopus ID: 2-s2.0-85070594043ISBN: 9780735418660 (print)OAI: oai:DiVA.org:kth-262569DiVA, id: diva2:1365390
Conference
24th SolarPACES International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2018; Casablanca; Morocco; 2 October 2018 through 5 October 2018
Note

QC 20191024

Available from: 2019-10-24 Created: 2019-10-24 Last updated: 2019-10-24Bibliographically approved

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Garrido, JorgeLaumert, Björn

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