Comparison of operational performance and analytical model of high concentrator photovoltaic thermal system at 2000 concentration ratioEmmanuel Shittu, Filippo Paredes, Benedetto Schiavo, Luca Venezia, Sergio Milone, Fabio Montagnino and Maria KolokotroniE3S Web Conf., 111 (2019) 06007DOI: https://doi.org/10.1051/e3sconf/201911106007