Evacuated flat thermal systems equipped with a Compound Parabolic Concentrator (CPC) represent a solar thermal architecture useful to meet the growing world demand for mid-temperature heating. The performance of such a system could be improved by coating the inner side of the encapsulating glass with a selective InfraRed (IR) mirror. The underlying physical mechanism is the cold-side external photon recycling, which allows to recover the power radiated by the absorber and, consequently, to increase the solar thermal efficiency. By means of a thermal model and numerical simulations, here we demonstrate how the mirror sensibly influences the panel performance: despite a transmittance drop in solar wavelengths that affects the efficiency below 250 °C, efficiency increases are achieved at higher temperatures.

Performance of a CPC inserted in a high vacuum envelope / D'Alessandro, Carmine.; DE MAIO, Davide; De Luca, Daniela.; Musto, Marilena; DI GENNARO, Emiliano; Russo, Roberto. - 2445:(2022), p. 120009. (Intervento presentato al convegno 26th International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2020 tenutosi a deu nel 2020) [10.1063/5.0086369].

Performance of a CPC inserted in a high vacuum envelope

d'Alessandro Carmine.
;
De Maio Davide;De Luca Daniela.;Musto Marilena;Di Gennaro Emiliano;
2022

Abstract

Evacuated flat thermal systems equipped with a Compound Parabolic Concentrator (CPC) represent a solar thermal architecture useful to meet the growing world demand for mid-temperature heating. The performance of such a system could be improved by coating the inner side of the encapsulating glass with a selective InfraRed (IR) mirror. The underlying physical mechanism is the cold-side external photon recycling, which allows to recover the power radiated by the absorber and, consequently, to increase the solar thermal efficiency. By means of a thermal model and numerical simulations, here we demonstrate how the mirror sensibly influences the panel performance: despite a transmittance drop in solar wavelengths that affects the efficiency below 250 °C, efficiency increases are achieved at higher temperatures.
2022
978-073544195-8
Performance of a CPC inserted in a high vacuum envelope / D'Alessandro, Carmine.; DE MAIO, Davide; De Luca, Daniela.; Musto, Marilena; DI GENNARO, Emiliano; Russo, Roberto. - 2445:(2022), p. 120009. (Intervento presentato al convegno 26th International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2020 tenutosi a deu nel 2020) [10.1063/5.0086369].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/887730
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