Technical and economic studies of using hybrid system (MED+RO) for seawater Desalination

In this study, to respect the shortage of water and consuming of the electrical power in the periphery of the Persian Gulf, generation of water and electricity is considered concurrently. In this paper, supplying the water, electricity as well as the cost of them in the city of Bashagard are investigated by using the system of MED+RO. Regarding to the ppm of the Persian Gulf’s water 45000, the amount of supply water 10000 m3/day are considered. In this design, the RO system and final price recovery for the entire system are calculated equal to 42% and 2.3 $/m3 consequently. Regarding the flow of outlet steam of HRSG, using the system of MED could not supply the required fresh water alone, but with the use of the GT+MED+RO hybrid system electricity and fresh water needed for this city are supplied. The utilizing of the hybrid system has also led to an increment in costs, which can be used with RO pumps using the more powerful gas turbine with the use of more electricity, and costs decreased from 2.8 to 2.3 $/m3 .