Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8078192 | Energy | 2014 | 7 Pages |
Abstract
In the present work, theoretical performance evaluation of a stepped solar still using water film cooling over the glass cover is investigated. The effect of film cooling thickness, flow rate, inlet temperature, and air wind speed on the stepped solar still daily productivity is studied. To increase the performance of the stepped solar still outlet water film cooling is recycled as a makeup water. It was found that film cooling thickness, volumetric flow rate, and water film inlet temperature have a significant effect on the daily distillate productivity. The presence of the glass cover water film cooling may increase the stepped still daily productivity by about 8.2% but the value of this percentage mainly depends on the combinations of film cooling parameters. On the other hand, the presence of the film cooling neutralized the effect of air wind speed on the still distillate productivity. Moreover, it was found that the proper combinations of film cooling parameters have a great influence on stepped still productivity and the best combination was: film thickness from 2.5Â ÃÂ 10â4 to 5.5Â ÃÂ 10â4Â m, cooling water volumetric flow rate from 4Â ÃÂ 10â5 to 8.5Â ÃÂ 10â5Â m3/s, and glass cover length from 2 to 2.8Â m. Finally a good agreement between the present theoretical work and previous experimental result has been obtained.
Related Topics
Physical Sciences and Engineering
Energy
Energy (General)
Authors
Y.A.F. El-Samadony, A.E. Kabeel,