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Abstract The other experiments were carried out for studying the performance of the modified solar distiller and comparing its performance with a conventional solar distiller for the same water depths and for water depths of 2 cm and 3 cm. Thus, two experiments were carried out. First, the water basin depths were 2 cm and 9 cm for the two conventional distillers and 9 cm for the modified distiller. In the second experiment, the water depths were 3 cm and 10 cm for the two conventional distillers and 10 cm for the modified one. The accumulated productivities for conventional distiller with water depth of 2 cm, conventional distiller with water depth of 9 cm and modified distiller with water depth of 9 cm were 1.48667 (lit/day), 1.67333 (lit/day), and 1.75333 (lit/day), respectively. This means that, a daily enhancement in productivity of 12.55% and 17.93% for conventional distiller with water depth of 9 cm and modified distiller with water depth of 9 cm over conventional distiller with water depth of 2 cm; respectively, was obtained. The accumulated productivities for conventional distiller with water depth of 3 cm, conventional distiller with water depth of 10 cm and modified distiller with water depth of 10 cm were 1.49567 (lit/day), 1.340 (lit/day), and 0.885 (lit/day), respectively. The CFD simulation for the conventional solar distiller will be presented. There are two simulation modes, the first is a steady mode and the second is a transient mode. The transient mode was used because it allows executing many calculations and leads to a real simulation of the distiller. A comparison between the experimental and simulated results of temperatures and productivity has been made. On 14th July, for conventional distiller with 2 cm water basin depth, the maximum experimental and simulated temperature for absorber plate were found 71 and 75.4 C; respectively, with enhancement of 6.19 % and for glass cover were 59 and 52.5 C with relative change of 11.02 %. Whereas. |