PARAMETRIC STUDY OF AN ACTIVE SOLAR FLAT-PLATE COLLECTOR WATER HEATER. Nigerian Journal of Technology, [S. l.], v. 38, n. 4, p. 876–883, 2019. Disponível em: https://mail.nijotech.com/index.php/nijotech/article/view/2119. Acesso em: 19 apr. 2026.