Experimental and theoretical investigations on a double exposure single basin solar still

This paper presents construction and measured performance of a double exposure solar still. Temperatures of water and the condensing surface were measured employing Copper–Constantan thermocouple via data logger. To validate the measured performance, a theoretical analysis was carried out. Explicit expressions were derived for the temperatures of water, absorber and condensing surface of the double exposure solar still. Explicit expression was also derived for the distillate output. Quantitative assessment of the analytical results was made. The water temperature and the condensing surface temperature measured experimentally were compared with the theoretically evaluated values. The correlation coefficient and root mean squire deviation are found to be 0.989 and 0.068, respectively.