In this study, solar energy was utilized to distillate and purify saline water throw a single slope solar still. The used solar still is from the conventional type which is one of the best solutions to overcome the lack of drinking water in remote arid areas. It consists of square basin of area 1 m2, black box fitted with saline water, and transparent glass cover with 4 mm thick. The experiment was conducted at four saline water depths (1, 2, 3 and 4 cm from the still bottom) and at two levels of water salinty (15000 ppm and 35000 ppm). Several experiments carried out (January, February, March and April 2018). Experiment was carried out on single slope solar still designed and installed at
The objective of this study was to increase the performance and productivity of the solar still to use the distillate water for drinking and hydroponic. Fresh water shortages are rapidly becoming a critical problem in many areas of the world. Such a crisis seriously affects both the industrial and agricultural sectors and adversely affects human life. Therefore, the desalination water that uses solar energy is considered the best solution for solving this problem. Solar still was designed as a rectangular basin with dimensions of 100, 100, and 7.5 cm for length, width, and height respectively. This still was locally made up of 3 mm thick galvanized iron (GI) steels
This research aims to study the effect of using the cooling and ventilation system on the production and quality of lettuce and mint crops in autumn and winter season. Two poly-greenhouse models were constructed at the Agricultural Engineering Research Institute (AEnRI), Al-Giza Governorate, Egypt (Latitude of 30.02˚ and longitude of 31.13˚ (. One of them was equipped with photovoltaic (PV) system to feed electrical load of greenhouse as cooling and ventilation control system (treatment) to control, the maximum and minimum temperature to control the interior climate and the other was a traditional greenhouse (control). The plants were planted in a greenhouse under a hydroponic system. Results of the experimental work shows that the specific approach of cooling and mechanical ventilation for lettuce and mint crop production enhances the rate of growth and increasing the fresh lettuce and mint yield by 52.88% and 49.91%, respectively comparing with control greenhouse.
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