Recent developments in gas turbines encourage their use in utility power generation in many parts in the world. The addition of a heat recovery steam generator (HRSG) to a gas turbine to utilize its waste heat finds good application in many of the Arabian Gulf countries to desalt seawater from the steam generated by the HRSG. Also the addition of a steam turbine to utilize this steam, to form what is called a combined power cycle, greatly increases the efficiency of power generation. The use of a combined cycle as a cogeneration power-desalting plant looks very attractive as it saves fuel in producing both electric power and desalted water.