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COMPARISON BETWEEN SIMULATION AND MEASURE-MENT FOR A TUBE RECEIVER FOR AIR HEATING

Uhlig, Ralf und Buck, Reiner und Amsbeck, Lars (2006) COMPARISON BETWEEN SIMULATION AND MEASURE-MENT FOR A TUBE RECEIVER FOR AIR HEATING. In: Proc. 13th SolarPACES Int. Symposium. 13th SolarPACES Int. Symposium, 2006-06-19 - 2006-06-23, Sevilla, 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 this application pressurized air must be heated to 800°C or higher. The easiest way to do this is using directly irradiated me-tallic tubes. A tube receiver was developed and tested together with a small gas turbine. The receiver consists of 16 helically bent tubes connected in parallel, arranged in a cavity behind a secondary concentrator. The receiver was successfully tested at the PSA, Almería, at tempera-tures up to about 600°C. Typical for this application is the strongly inhomogeneous heat load on the absorber tubes with high solar flux on the irradiated side. A receiver model was developed to simulate the thermal performance based on a 3-dimensional finite element (FE) model. Ray-tracing was used to obtain the solar flux distribu-tion on the FE grid. The heat transfer coefficients at the inner tube side are calculated with local Nusselt numbers and temperature dependent material properties. Radiation exchange is modelled by the enclosure method. The tool was used to calculate stationary operating condi-tions, e.g. the temperature distribution in the receiver, for a specific solar test condition. Based on air mass flow and inlet temperature the outlet temperatures and receiver efficiency were determined. Results from the model are compared to experimental results from solar tests for verification. Also, further development, both in modelling and hardware, for metallic tube receivers with temperatures of 800°C and higher is described.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:COMPARISON BETWEEN SIMULATION AND MEASURE-MENT FOR A TUBE RECEIVER FOR AIR HEATING
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Uhlig, RalfNICHT SPEZIFIZIERT
Buck, ReinerNICHT SPEZIFIZIERT
Amsbeck, LarsNICHT SPEZIFIZIERT
Datum:19 Juni 2006
Erschienen in:Proc. 13th SolarPACES Int. Symposium
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Solar power, solar tower, central receiver, tube receiver, ray-tracing, FEM
Veranstaltungstitel:13th SolarPACES Int. Symposium
Veranstaltungsort:Sevilla, Spain
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2006-06-19 - 2006-06-23
HGF - Forschungsbereich:Energie
HGF - Programm:Erneuerbare Energie
HGF - Programmthema:E SF - Solarforschung (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SF - Solarforschung
DLR - Teilgebiet (Projekt, Vorhaben):E - Solare Hochtemperatursysteme (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Thermodynamik > Solarforschung
Hinterlegt von: Ralf Uhlig
Hinterlegt am:08 Feb 2007
Letzte Änderung:27 Apr 2009 13:29

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