There is a shortage of the drinking water in worldwide due to the increased population and the changes of climatic conditions; moreover there is shortage of the power too. The power is not only used for the desalination system but also for daily life of humans. This paper addresses the demand of the power and desalination system in a common cycle. The integration of power and desalination is the main objective which will give two products using solar as energy source. The Rankine cycle is modified and the problem of vacuum in the thermal desalination system is minimized. The theoretical analysis is made for proposed system and it is suggested for 1000LPD solar flat plate desalination system. It produces 3.51 kW of power for the 1000LPD solar flat plate desalination system. © Research India Publications.