Impact of back wall tilt angle of newly designed solar distiller having wick region: Energetic and heat and mass analysis

A theoretical study is presented on the effect of the back wicked wall tilt angle of single slope solar distiller having newly designed based on energetic and heat and mass transfer analysis. The solar distiller design is based on attaching a wick material as the interior surface of the back wall. The study is performed under summer, winter, and spring seasons of Egypt. A mathematical model including the energetic and thermal analysis of the physical model is constructed, solved, and validated. The back wall tilt angle (90o, o , 70o, o , and 50o) o ) and climate conditions impact on the distiller production, performance, and thermal characteristics is studied. The outcomes reveal that the newly designed distiller counterparts the conventional one in terms of evaporation and condensation rates, freshwater production, and efficiency. The maximum new distiller performance is achieved in case of wall tilt angle of 70o, o , 50o, o , and 90o o for winter, spring, and summer, respectively. Besides, its daily maximum productivity is 4.6, 5.8, and 6.1 kg/m2 2 in winter, spring, and summer, respectively compared to 2.7, 4.2, and 4.9 kg/m2 2 for conventional distillers, respectively. Moreover, the maximum rise in its average efficiency is 67 %, 23 %, and 36.2 % in December, June, and March, respectively compared to the conventional distiller.