LAUSR

Due to the water crisis and many available combined cycle power plants in any part of Iran, freshwater production from brine water resources through a combined cycle power plant is a promising scenario. In this regard, the integration of the desalination plant with the Qom power plant is investigated. To this end, the thermodynamic, exergetic and exergoeconomic modeling and simulation of the Qom combined cycle power plant are integrated with hybrid multi-stage flash (MSF) + reverse osmosis (RO) and multi-effect desalination (MED) + RO units. To do so, computer code is developed for the thermodynamic simulation of the main components of the combined cycle power plant, as well as the individual MSF-RO and MED-RO desalination units. Furthermore, computer code is developed for the exergetic and exergoeconomic analyses of the integrated MED-RO and MSF-RO combined cycle. The results of the avoidable/unavoidable exergoeconomic analysis show that the air compressor and the heat recovery steam generator are the most potent components to be improved economically because they have the highest amounts of the avoidable investment cost rate in the system. The integration of the combined cycle power plant with the desalination units leads to the production of 262.3 kg/s; 1,800 kg/s; and 2,181.6 kg/s desalinated water at the cost of about 21.89 ($/h); 4,820.1($/h); and 7,363.4 ($/h) in RO, MED-RO and, MSF-RO units, respectively.