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Transient stresses at metallic solar tube receivers

Uhlig, Ralf (2011) Transient stresses at metallic solar tube receivers. In: referiert. 17th SolarPACES 2011 Conference, 20.-23. Sept. 2011, Granada, Spain.

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Kurzfassung

Using highly concentrated solar radiation for power generation with gas turbine cycles is a promising way for cost effective solar power production. In order to reach the required high temperatures (800°C), a high concentration of the solar radiation is necessary. This is achieved in a solar tower plant where many movable mirrors ("heliostats") concentrate the direct solar irradiation on a focal spot on the top of a tower where the receiver is located. A possible type of such a receiver exists of directly irradiated metallic tubes. The receiver components, especially the absorber tubes, are subjected to complex thermo-mechanical loads including fast thermal transients due to clouds passing the heliostat field and slower transients due to startup and shutdown cycles. Furthermore, the solar irradiation varies over day and year. To determine the local transient temperature distribution in the receiver, a three-dimensional finite element model was developed. Ray-tracing was used to obtain the solar flux distribution on the FE grid. The heat transfer to the fluid was considered using a one dimensional thermal fluid element. Radiation exchange was modeled by the enclosure method. In order to predict the fatigue life of a receiver design a Chaboche-type plasticity model was used. The results showed a weakness of the first design. Following the receiver was re designed to improve the life time.

elib-URL des Eintrags:https://elib.dlr.de/83595/
Dokumentart:Konferenzbeitrag (Paper)
Titel:Transient stresses at metallic solar tube receivers
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Uhlig, RalfSF-PFS STNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:2011
Erschienen in:referiert
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Solar power, tube receiver, ray-tracing, TMF, fatigue life prediction
Veranstaltungstitel:17th SolarPACES 2011 Conference
Veranstaltungsort:Granada, Spain
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:20.-23. Sept. 2011
HGF - Forschungsbereich:Energie
HGF - Programm:Erneuerbare Energie
HGF - Programmthema:Konzentrierende Solarsysteme (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SF - Solarforschung
DLR - Teilgebiet (Projekt, Vorhaben):E - Punktfokussierende Systeme (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Solarforschung
Hinterlegt von: Uhlig, Tamara
Hinterlegt am:29 Jul 2013 16:38
Letzte Änderung:29 Jul 2013 16:38

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