International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print), ISSN 0976 – 6359(Online) Volume 4, Issue 2, March - April (2013) © IAEME 530 THE PERFORMANCE OF HEAT ABSORBER FROM ZINC ON THE EFFICIENCY OF DOUBLE SLOPE SOLAR STILL Nattadon Pannucharoenwong 1 and Chawisorn Phukapak 2 1 (Department of Agricutural Machinery Engineering, Faculty of Engineering, Rajamangala University of Technology Isan Khonkaen Campus, Khon Kaen 40000, Thailand) 2 (Department of Engineering Management, Faculty of Science and Technology Rajabhat Maha Sarakham University, Maha Sarakham 44000, Thailand) ABSTRACT The distilled water productivity of the effect of size of the heat absorber from Zinc on the efficiency of double slope solar still. 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 Zinc used in the experiment has divided 9 sizes from 10% to 90% 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 was show that using the size of 10% of Zinc absorber has the maximum condensed water at 1.43 liters / day and has the efficiency at 25.99%.The minimum efficiency is 15.02% where size of 90% of Zinc absorber was used the result was also revealed that the efficiency of solar still was decreased according to the increasing of the size at Zinc absorber. Keywords : Solar still, Efficiency, Absorber, Zinc, Layer INTRODUCTION Condenced water is a significant product and has been used in vary uses such as scientific laboratory, medical practices, industries and especially in consumption. Purity of condensed water depends on the usage.Condense water production needs energy for instance INTERNATIONAL JOURNAL OF MECHANICAL ENGINEERING AND TECHNOLOGY (IJMET) ISSN 0976 – 6340 (Print) ISSN 0976 – 6359 (Online) Volume 4, Issue 2, March - April (2013), pp. 530-541 © IAEME: www.iaeme.com/ijmet.asp Journal Impact Factor (2013): 5.7731 (Calculated by GISI) www.jifactor.com IJMET © I A E M E