Thermoeconomic Analysis of a Double Slope Basin Solar Still Equipped to Phase Change Material and Photovoltaic Thermal Collector

In present study the thermoeconomic analysis of a double slope basin solar still equipped to phase change material (PCM) and photovoltaic thermal (PV/T) collector is carried out. The governing equations of problem are obtained by writing energy balance for different components of the system. The goal of governing equations solution is the calculation of glass cover temperature, absorber temperature, saline water temperature, PCM temperature, freshwater productivity and the useful heat gain of PV/T collector. Also, the output electrical power of PV module is calculated by four parameters current-voltage model. Present study numerical results are in good agreement with experimental data. The system performance evaluation is carried out from the viewpoint of freshwater productivity and energy efficiency for the sample winter and summer day of Zahedan. Results show that the freshwater productivity increases to 10.6% by increasing of mass flow rate from 0.001 to 0.01 kg/s. Increase of saline water mass of basin from 20 to 30 kg decreases the freshwater productivity to 4.8% during the day. On the other hand, it increases the freshwater productivity to 7.43% during the night. The energy efficiency is 37.5% less on winter day than summer day. The freshwater production cost is obtained 0.0314 $/l.m2.