In this model Linear Fresnel Collector (LFC) has been used as power source for thermal desalination process. LFC is considered as as a brine heater (steam source) for evaporation via direct vapor generation through the solar field. Flash evaporation tank is used to generate the steam from the heated brine from the solar field. The brine content from the flash tank is considered as a blowdown or rejected brine. End Condenser unit is used for condensation process. Seawater or saline water