Enhancing the solar-to-thermal energy conversion in high vacuum flat plate solar collectorsRoberto Russo, Davide De Maio, Carmine D’Alessandro, Daniela De Luca, Antonio Caldarelli, Eliana Gaudino, Marilena Musto and Emiliano Di GennaroEPJ Web Conf., 266 (2022) 07005DOI: https://doi.org/10.1051/epjconf/202226607005