الفهرس 
Modifications achieved in the design of dryer units
Dual uses of solar collectors and energy storage materialsOnly 14 pages are availabe for public view
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Abstract
The present theoretical study aims to innovate a developed hybrid system powered by solar energy to dry plants and produce pure water, suitable for remote regions that suffer from power problems and the problem of lack of pure drinking water. This was done by integrating a two-stage dryer unit with modified solar still with an air injection system and external condenser to dry plants as well as produce pure water. The integration of the modified solar still and external condenser with the two-stage dryer unit aims to increase the rates of pure water productivity, by injecting the hot humid air that leaves the drying unit into the modified solar still to increase evaporation rates, and thus increase the pure water productivity of the modified solar still. Also, the modified solar still with air injection was integrated with an external condenser to condense the water vapor present in the humid air that left the modified solar still before expelling it externally to the surroundings. Also, the proposed innovative developed hybrid system contains photovoltaic/thermal panels that were used as a source of electricity needed to drive air fans and water pumps, as well as a solar preheating unit in addition to two solar air collectors and an evacuated tube solar collector. The previously published experimental study validates the mathematical models of this study. The results presented that, the suggested two stages of the dryer with reheating represent a good design that improved the removed water mass from products by 72.65% as compared to single stage dryer unit. The proposed innovative developed hybrid system can be produced cumulative pure water with a rate reaching 49.94 liter/day, with an improvement of 592.65% as compared to only modified solar still with air injection. Also, the proposed innovative developed hybrid system represents a good choice which improved the gain output ratio by 177.93% on average as compared to only a two-stage dryer unit with reheating.