A PCM-integrated single slope solar still with CPC-CTSS has been
investigated to enhance the productivity. The rise in temperature in
the basin of the solar still was due in part to heat extracted from the
cooling water of the CPC-CTSS. The useful heat extraction plays a vital
role to augment the system productivity. After sunset, the PCM acts as
a heat source for the basin water to maintain the temperature difference
with the cover. Therefore, it is recommended to integrate storage materials
in tubular solar stills to produce fresh water overnight. Circulating
with cooling water, the yield of CPC-CTSS was found to be 3.5 L/m2
/day.
With the addition of the single slope still, the collector area increased,
but the output yield per area of the still was raised to 2.7 L/m2
/day.
The evaporative heat transfer coefficient from the present solar still
was found to be increased by 700% and 176% as a parameter of increase
in inlet temperature of water in conventional single slope solar still.