PERFORMANCE OF A SINGLE SOLAR STILL WITH WATER COOLING OF GLASS COVER

Document Type : Original Article

Authors

1 Associate Prof. of Agric. Eng. Dep., Fac. of Agric., Suez Canal Univ., 41522 Ismailia, Egypt.

2 Lecturer of Agric. Eng. Dep., Fac. of Agric., Suez Canal Univ., 41522 Ismailia, Egypt.

Abstract

Four identical solar stills were used to evaluate the effect of booting an external water film to cool down the outside glass cover surface. Solar stills were designed, installed and tested at the Agricultural Engineering Department, Faculty of Agriculture, Suez Canal University, Ismailia Governorate, Egypt. The first still was used without cooling as a control. The other three solar stills were supported with a water pump to boost cool water over the glass cover surface and operated for one minute and stopped every 10, 15 and 20 minutes, respectively. The obtained results showed that cooling the outside glass cover increases the stills productivity by 33.2, 20.4 and 12 % for the second, third and fourth solar still, respectively above the solar still without cooling. For the duration of the experimental tests, the hourly average volumetric thermal efficiency was 31.9, 40.4, 41.9 and 43.2 % for the first, second, third and fourth solar still, respectively.

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Misr Journal of Agricultural Engineering
Volume 33, Issue 3
July 2016
Pages 1049-1064

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