Innovative selective solar absorber for high vacuum flat panel

Daniela De Luca; Antonio Caldarelli; Eliana Gaudino; Paolo Strazzullo; Marilena Musto; Umar Farooq; Emiliano Di Gennaro; Roberto Russo

doi:10.1051/epjconf/202328705017

All issues

Volume 287 (2023)

EPJ Web Conf., 287 (2023) 05017

Abstract

Open Access

Issue		EPJ Web Conf. Volume 287, 2023 EOS Annual Meeting (EOSAM 2023)


Article Number		05017
Number of page(s)		2
Section		Topical Meeting (TOM) 5- Optical Materials
DOI		https://doi.org/10.1051/epjconf/202328705017
Published online		18 October 2023

EPJ Web of Conferences 287, 05017 (2023)
https://doi.org/10.1051/epjconf/202328705017

Innovative selective solar absorber for high vacuum flat panel

Daniela De Luca¹^,3, Antonio Caldarelli¹^,2, Eliana Gaudino¹^,2, Paolo Strazzullo¹^,2, Marilena Musto¹^,2, Umar Farooq¹^,3, Emiliano Di Gennaro¹^,3 and Roberto Russo¹^*

¹ National Research Council of Italy, Napoli Unit, Institute of Applied Sciences and Intelligent Systems, 80131 Napoli, Italy
² Industrial Engineering Department, University of Napoli "Federico II", 80126 Napoli, Italy
³ Physics Department, University of Napoli "Federico II", 80126 Napoli, Italy

^* Corresponding author: roberto.russo@na.isasi.cnr.it

Published online: 18 October 2023

Abstract

Selective Solar Absorbers (SSAs) are the critical element of high-vacuum flat plate collectors, as these are subject to elevated operating temperatures and thus experience high radiation losses. Here we design and optimize an SSA based on a multilayer design made of HfC_x, Si₃N₄, and SiO₂ layers. The structure of the proposed SSA has been optimized to maximize the solar-to-thermal energy conversion efficiency in high vacuum solar thermal panels working at 200 °C, reaching thermal emissivity values much lower than absorbers currently available on the market (<0.02 Vs >0.07) and obtaining unprecedented performances.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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