HILAL, Fatima; HASSEN, Abdulsalam. Estimating the Solar Fraction of a Closed Solar Water Heating System Using the Utilizability F-Chart Method under Various Operating Conditions. Wasit Journal of Engineering Sciences, [S. l.], v. 14, n. 1, p. 1–14, 2026. DOI: 10.31185/wjes.Vol14.Iss1.645. Disponível em: http://ejuow.uowasit.edu.iq/index.php/ejuow/article/view/645. Acesso em: 16 apr. 2026.