Power generation from salinity gradient solar pond using thermoelectric generators for renewable energy application

Abstract

Salinity-gradient solar pond (SGSP) is capable of storing heat at temperature up to 80°C. The temperature difference between the upper convective zone (UCZ) and lower convective zone (LCZ) of a SGSP can be in the range of 40°C – 60°C. This temperature difference can be used to power thermoelectric generators (TEG) for electricity production. This paper present results of a TEG system designed to be powered by the hot and cold water from the SGSP. The system is capable of producing electricity even on cloudy days or at night as the SGSP acts as a thermal storage system. The results obtained have indicated significant prospects of such system to generate power from a low grade heat for remote area power supply.