Seawater multi-effect distillation energized by a combustion turbine

The paper describes the feasibility study results of a combined power and desalination plant incorporating a horizontal falling-film type low-temperature multi-effect distiller (MED), HRSG, and a combustion turbine, preferably fuelled by natural gas. In this system the large quantity of slightly superheated steam is injected into the turbine to increase its power output. The injected steam thermal energy is fully recovered along with the extra cooling of the flue gases in a direct-type MED feed heater. The plantʹs major components, performance, economics and techniques for determining profitability are discussed.