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Building up a proficient and financially savvy sun-powered dryer for consistent drying of horticultural food items at the consistent state and moderate temperature (35–70 0C) has gotten conceivably a practical substitute for petroleum product in a significant part of the creating scene. Sun-based energy stockpiling can decrease the time between energy supply and energy interest, subsequently assuming an indispensable part in energy preservation. The country and metropolitan populaces, depend chiefly, on nonbusiness energize to meet their energy needs. Sunbased drying is one potential arrangement yet its acknowledgment has been restricted mostly because of certain obstructions. A lot of trial work in the course of the most recent couple of many years has just shown that rural items can be agreeably dried out utilizing sun-based energy. Different plans of limited scope sunlight-based dryers having nuclear power stockpiling have been created in the new past, mostly for drying agrarian food items. Thusly, in this paper, an endeavor has been taken, to sum up, the past and momentum research in the field of nuclear power stockpiling innovation in materials as reasonable and dormant warmth in sunlight-based dryers for drying agrarian food items. With the capacity unit, rural food materials can be dried in the late night, while late-night drying was unrealistic with an ordinary sun-based dryer. So that, a sunpowered dryer with a capacity unit is valuable for people and just as for energy preservation. As of late, analysts considered the warmth move upgrade of the thermal energy stockpiling with PCMs because most stage change materials have low warm conductivity, which causes quite a while for the charging and releasing interaction. Normally, the plan of idle warmth nuclear power stockpiling will lessen the expense and the volume of cooling frameworks and organizations.

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The necessity of fresh water is growing day by day as the population and industrialization is increasing. As earth contains 71% of salinity water we have to convert that salinity water into fresh drinkable water. The device which converts salty water into drinkable water by using green source of energy that device is known as solar still. But due to its lesser efficiency it cannot be used in industrial purposes. To increase its productivity and efficiency many researcher has done improvement in various stills. Some researchers has used the nanoparticles due to their favourable thermo physical properties and optical characteristics. Nano particles and solid particles having the diameter in the range of 1 - 100 nm, are used from last two decades, and certainly a new approach among others. The ability of attaining the required thermo physical properties of nanoparticles, by the variation in the particle size, shape and concentration, rewarded them as one of focused area of research in the solar still. This paper contains the exhaustive review of literature on the utilization of nanoparticles in active and passive desalination system to investigate the best suitable nanoparticles for solar still. From review it was found that the efficiency and daily productivity of the still was increased by using nanoparticles in it.