Thermal modeling and exergetic analysis of a thermoelectric assisted solar still

It is shown that the daily average energy and exergy efficiencies of the solar still are 19.8% and 0.95%, respectively. It is seen that the exergy efficiency is much lower than the energy efficiency. Furthermore, it is found that the rate of exergy destructions in solar still components is proportional to the incident solar intensity. The largest exergy destruction belongs to the thermoelectric module, which is 63.4% of the total exergy destruction, while the glass cover has the smallest share. It is concluded that although the energy efficiency associated with this type of thermoelectrically assisted solar still is higher than its counterpart simple passive solar still one, however, its exergy efficiency is lower.