The effect of heat losses and heat transfer coefficient on the efficiency of the solar air heater collectorBekzod Abdukarimov, Muxammadrafiq Toxirov, Bekzod Boynazarov, Jamshid Obidov and Farangiz TillaboyevaE3S Web of Conf., 452 (2023) 04006DOI: https://doi.org/10.1051/e3sconf/202345204006