Two modifications of solar water distillers using cement and aluminum absorbers are presented\nexperimentally. The first modification uses separated condenser to purge vapor from the cement\nabsorber distiller to increase the condensation, while second modification uses a plate thermosyphon\ncharged with acetone installed on the bottom of the water basin in the aluminum absorber distiller to\nincrease input energy to the distiller, thus increasing water vaporization and condensation. The\noptimum tilted angle of the glazing surface calculated to between 10 to 20�° at latitude angle of 30�°. The\ndaily productivity of the cement absorber distiller was 2.08 L/ (m2.day) and increased by percentage of\n18% using the separated condenser and the overall efficiency being increased from 35% to more than\n48%. For the aluminum absorber distiller the average daily productivity was 2.96 L/(m2.day) and\nincreased to 3.49 L/(m2.day) using plate thermosyphon with the overall efficiency being increased from\n50% to more than 65%.
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