Comparison of Aluminum and Zinc as a Heat Absorber in Double-Step Solar Still
Chawisorn Phukapak ^1* and Sorawin Phukapak ^2
1 Department of Engineering Management , Faculty of Engineering, Rajabhat Maha Sarakam University
² Department of Mechanical Technology , Faculty of Technology, Rajabhat Udonthani University.

Abstract

This paper presents the effect of size of the heat absorber from aluminum and zinc on the efficiency of double slope solar still. Aluminum and Zinc was chosen to use as heat absorber and was put on the water surface in the second layer of the solar still. The size of Aluminum and Zinc used in the experiment has divided 9 sizes from 4-8 m2 of the surface of the water in the second layer of the solar still. The temperature, condensed water and efficiency of solar still were measured and calculated in the experiment. The result showed that using the size of 4 m2 of Aluminum and Zinc absorber has the maximum condensed water at 1,629 ml/day and 1,506 ml/day has the efficiency at 26.11% and 25.56%. The result showed that using the size of 4 m2 of Aluminum and Zinc absorber has the minimum condensed water at 1,461 ml/day and 1,369 ml/day has the efficiency at 22.95% and 22.52%. Comparing both types of absorber at aluminum and zinc performs better due to the higher heating value. The result revealed that the efficiency of solar decreased according with an increased in the size of Aluminum and Zinc absorber.