Water is an essential part of all living creature – human, Animals, plants etc. in olden days humans are depend on revers and ponds for fresh waters, but as industrialization goes on they are no more drinkable and fresh. So getting fresh water is a challenging job now a days in developing countries. As population is going on increasing, need for fresh water is keeps on increasing day by day. The available water on earth is limited to 79%, out of which only 2% water is directly available [1], from which only 0.36% is drinkable water [2]. Ocean is the main source of water but it contains highly salinity, so it need to first desalinate before use. There are many techniques to convert brackish water in to potable water [3].
Other methods for desalinations …show more content…
Previous experimental results shows that the brine depth have the inverse relation with yield production [5-7]. The variation in the convective heat transfer coefficient and thermal coefficient of solar stills were studied by Tiwari and Tripathi [8, 9], where the Brine depth was chosen as major parameter that affects the still performance. As brine depth increases, the volumetric heat capacity of the still is reduced; hence the water temperature is decreased for the given solar irradiation. The heat stored in the water during sunshine hours is released during the night time and production is continuous even during the …show more content…
The lower depth has been found giving the highest yearly average distillate production. Increase in the water depth decreases the distillate production capacity of the still up to depths of about 0.1 m but for depth of water more than 0.1 m it becomes almost constant. The daily distillate production for the lower water depth of 20mm has been found to be 32.57% and 32.39% more as compared to that of the higher water depth 18mm in summer and winter respectively. The daily production in summer, of the lowest water depth (20mm) has been found to be 66.9% more than the relative value of winter for the same water depth [10].
Effect of Heat Storage Material:
The productivity of Solar still can be increase by using heat storage material in basin or in construction wall of solar still. Heat storage material increases the absorptivity of solar flux and hence increase the yield in day time as well as in night. Heat storage material stores heat in day time and supplies back in night to saline water to increase overall performance of Solar still.
There are two types of Heat storage systems name
Other methods for desalinations …show more content…
Previous experimental results shows that the brine depth have the inverse relation with yield production [5-7]. The variation in the convective heat transfer coefficient and thermal coefficient of solar stills were studied by Tiwari and Tripathi [8, 9], where the Brine depth was chosen as major parameter that affects the still performance. As brine depth increases, the volumetric heat capacity of the still is reduced; hence the water temperature is decreased for the given solar irradiation. The heat stored in the water during sunshine hours is released during the night time and production is continuous even during the …show more content…
The lower depth has been found giving the highest yearly average distillate production. Increase in the water depth decreases the distillate production capacity of the still up to depths of about 0.1 m but for depth of water more than 0.1 m it becomes almost constant. The daily distillate production for the lower water depth of 20mm has been found to be 32.57% and 32.39% more as compared to that of the higher water depth 18mm in summer and winter respectively. The daily production in summer, of the lowest water depth (20mm) has been found to be 66.9% more than the relative value of winter for the same water depth [10].
Effect of Heat Storage Material:
The productivity of Solar still can be increase by using heat storage material in basin or in construction wall of solar still. Heat storage material increases the absorptivity of solar flux and hence increase the yield in day time as well as in night. Heat storage material stores heat in day time and supplies back in night to saline water to increase overall performance of Solar still.
There are two types of Heat storage systems name