Fig xA Schematic of an inverted absorber

Condensing cover:equation(454)ht,w(m+1)−g(m+1)(Tw(m+1)−Tg(m+1))=hc,g(m+1)−w(m+2)(Tg(m+1)−Tw(m+2))ht,w(m+1)−g(m+1)(Tw(m+1)−Tg(m+1))=hc,g(m+1)−w(m+2)(Tg(m+1)−Tw(m+2))where m≤i−2
For m=i−1, the A 844606 balance on condensing cover is modified as follows:equation(455)ht,w(m+1)−g(m+1)(Tw(m+1)−Tg(m+1))=hc,g(m+1)−a(Tg(m+1)−Ta)ht,w(m+1)−g(m+1)(Tw(m+1)−Tg(m+1))=hc,g(m+1)−a(Tg(m+1)−Ta)
It was observed that water and condensing cover temperatures decrease if the number of effect is increased due to the fact that available energy for a given basin is lower than the preceding basin. The yield increases as the number of effects in the multi effect inverted absorber solar still is increased and reaches an optimum value when the number of basin is seven. But, for eight and nine basin solar stills, there is only a marginal increase in the yield. Thus start codon is concluded that seven is the optimum number of basins in a multi-effected inverter absorber solar still. The yield from a seven effect inverted absorber solar still is about 4.2 times that from an inverted absorber single basin solar still. Also the total yield decreases with an increase in the depth of water in the lowest basin for each of the multi effect inverted absorber solar still.