The thermal efficiency of the heat receiving panels of solar collectors and CFD analysis of a screw duct collectorKh.S. Akhmadov, I.U. Shadmanov, A.S. Akramov, Z. S. Iskandarov and M.M. SobirovE3S Web Conf., 583 (2024) 04001DOI: https://doi.org/10.1051/e3sconf/202458304001