The passive and active solar-thermal input performance of a Shallow Evaporation Pond (SEP) has been studied. The performance of the SEP in evaporating water molecules due to the direct exposure solar radiation has been estimated from the periodic measurement of the solution specific gravity, salt concentration and the temperature of the brine solution. Active solar-thermal heating of the SEP has been achieved by collecting hot water from a domestic solar water heating system (SWH) and circulating it through a fabricated heat exchanger submerged inside the brine solution of SEP. The heat exchanging efficiency of the heat exchanger has also been reported. Recording and interpretation of data for the passive solar heating has been performed on SEP for six days. The climatic parameters such as solar insolation, ambient air temperature, air velocity, relative humidity, and saturated vapor pressure have been taken for performance prediction. Modeling calculations have been made to predict the temperature and the performance of SEP for the above mentioned mode of operation and the predicted results have been compared with the observed experimental values.
