Single basin double slope solar still with minimum basin depth and energy storing materials

Single basin double slope solar still: Year round performance prediction for local climatic conditions at Southern India

“…This is the reason for higher deviation between theoretical and actual production rates at lower depth of 0.5 cm. From the performance study of the laboratory still and actual still [8], it is revealed that the production rate is a complex function of water and glass temperature and waterglass and glass -atmospheric temperature differences. Also for the higher water temperature, a different operation region is observed.…”

“…The theoretical model [8] over predicts the production. At lower depth, the water temperature is high.…”

“…The theoretical analysis of the still is done using the new model proposed by Kalidasa Murugavel et al [8]. The total energy available for utilization by the still for given instant is the total irradiance transmitted (Q t ) through the covers for given time nd it is given by: Q t = Q tN + Q tS (10) where Q tN (= τ N A gN I N ) and Q tS (= τ S A gS I S ) are the irradiances transmitted through the north and south covers, τ N and τ S -the transmittances of the glass covers, A gN and A gS -the cover areas, and I N and I S -the incidence irradiances on the covers.…”

“…A single basin double slope solar still with basin area 1.7 m 2 was fabricated (stillsolar), theoretically modeled (still -theoretical) and experiments were conducted with different energy absorbing materials and wick materials by the authors [8,10]. Commercially available window glass was used as cover plate and its thickness was chosen as 4 mm to withstand the self-weight and thermal stresses.…”

“…For theoretical analysis, the transmittance of the cover plate is assumed as constant [2][3][4][5][6][7] and the irradiance on the horizontal basin area is taken as energy input [2, 3,[5][6][7]. However, the transmittance of the cover depends on many parameters like incidence angle, cover plate material and its thickness [8]. Only few authors have considered this effect during the analysis [9][10][11].…”