Multilayered selective solar absorber for unconcentrated solar thermal applications

Roberto Russo; Davide De Maio; Carmine D'Alessandro; Antonio Caldarelli; Eliana Gaudino; Marilena Musto

doi:10.1117/12.2595712

1 August 2021 Multilayered selective solar absorber for unconcentrated solar thermal applications

Roberto Russo, Davide De Maio, Carmine D'Alessandro, Antonio Caldarelli, Eliana Gaudino, Marilena Musto

Proceedings Volume 11824, New Concepts in Solar and Thermal Radiation Conversion IV; 118240E (2021) https://doi.org/10.1117/12.2595712
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

A new selective solar absorbers (SSA) optimized to work at 250°C without concentration is presented. The new SSA, based on Cr2O3/Cr multilayers, allows to obtain very high thermal efficiency up to 250°C in evacuated flat solar thermal panels without concentration. Multilayers have been deposited by magnetron sputtering on different copper substrates and characterized by reflectivity measurement as well as calorimetric measurements. Stagnation temperatures close to 400 °C have been obtained with a nominal irradiance of 1000W/m2. These results pave the way to the use of evacuated flat thermal panels for green industrial steam generation.

Conference Presentation

Citation Download Citation

Roberto Russo, Davide De Maio, Carmine D'Alessandro, Antonio Caldarelli, Eliana Gaudino, and Marilena Musto "Multilayered selective solar absorber for unconcentrated solar thermal applications", Proc. SPIE 11824, New Concepts in Solar and Thermal Radiation Conversion IV, 118240E (1 August 2021); https://doi.org/10.1117/12.2595712

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