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• W3110361681 startingPage "309" @default.
• W3110361681 abstract "In the context of central solar tower systems, tubular receivers are among the most appealing absorber solutions: the absorbed solar radiation is transferred from the tube external surface to the heat transfer fluid (HTF) flowing within the absorber. In the case of air as HTF, very high temperatures of the coolant can be obtained in principle, thus increasing the efficiency of the downstream thermodynamic cycle. To explore the possible applicability of a porous medium made of Raschig Rings (RRs), already successfully adopted in the heat removal from the resonant cavity of a technological device, the gyrotron, where the heat flux can go up to 20–25 MW/m2 and removed by subcooled water, a mock-up of a planar receiver equipped with RRs has been tested in a solar furnace, using air as coolant. The test results are presented here and analyzed1. Furthermore, a numerical model of the mock-up, where the RRs are modeled in detail by the Discrete Element Method, is presented and its capability to reproduce the measured data demonstrated. The model shows, for the tested configuration, an enhancement of the heat transfer of a factor of ~5 with respect to a plain channel with the same envelope, and a Performance Evaluation Criteria of 2–2.5 when the device is compared to the same receiver configuration, but without RRs." @default.
• W3110361681 created "2020-12-07" @default.
• W3110361681 creator A5021381681 @default.
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• W3110361681 date "2020-12-01" @default.
• W3110361681 modified "2023-10-05" @default.
• W3110361681 title "Experimental and numerical investigation of a porous receiver equipped with Raschig Rings for CSP applications" @default.
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• W3110361681 doi "https://doi.org/10.1016/j.solener.2020.11.006" @default.
• W3110361681 hasPublicationYear "2020" @default.
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