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- W2271917558 abstract "Using highly concentrated solar radiation for power generation with gas turbine cycles is a promising way forcost effective solar power production. In order to reach the required high temperatures (800°C), a highconcentration of the solar radiation is necessary. This is achieved in a solar tower plant where many movablemirrors (heliostats) concentrate the direct solar irradiation on a focal spot on the top of a tower where thereceiver is located. A possible type of such a receiver exists of directly irradiated metallic tubes. The receivercomponents, especially the absorber tubes, are subjected to complex thermo-mechanical loads including fastthermal transients due to clouds passing the heliostat field and slower transients due to startup and shutdowncycles. Furthermore, the solar irradiation varies over day and year. To determine the local transienttemperature distribution in the receiver, a three-dimensional finite element model was developed. Ray-tracingwas used to obtain the solar flux distribution on the FE grid. The heat transfer to the fluid was consideredusing a one dimensional thermal fluid element. Radiation exchange was modeled by the enclosure method. Inorder to predict the fatigue life of a receiver design a Chaboche-type plasticity model was used. The resultsshowed a weakness of the first design. Following the receiver was re designed to improve the life time." @default.
- W2271917558 created "2016-06-24" @default.
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- W2271917558 date "2011-01-01" @default.
- W2271917558 modified "2023-09-24" @default.
- W2271917558 title "Transient stresses at metallic solar tube receivers" @default.
- W2271917558 hasPublicationYear "2011" @default.
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