Mathematical modeling of the combined heat supply system of the solar house S.I. Khamraev, J.R. Kodirov, J.O. Arabov, U.M. Mavlonov and N.Z. Rakhimov E3S Web of Conf., 524 (2024) 01014 Published online: 16 May 2024 DOI: 10.1051/e3sconf/202452401014