The fgure illustrates the process of production electricity by a system called Ocean Thermal Energy Conversion (OTEC) .There are Three stages in the process of production electricity .Evacuated vaporation chamber , Condensing chamber and waste salt water . irstly, Evacuated vaporation chamber ma!e saltiness water vapor turbin creativity electricity by warm seawater because of solar energy , secondly water vapour condensed in chamber creating pure water and cold water waste salt water and ready to produce drin!ing water .