Efficiency Improvement And Superiority of Steam Injection İn Gas Turbines

Abstract

An open cycle gas türbine with a heat exchanger and its modifica- tions have been studied. These modifications include the combinations of the gas türbine with a steam injection system and the gas türbine with a closed cycle steam türbine. The steam is generated by a waste heat boiler. It was found that in both cases the efficiency and the net output of the gas türbine increased considerably of the order of 20 to 40 %. In order to define the superiority regions of the systems studied in various ranges of power output, an economic analysis per unit power has been done. For short duration, intermittent type of operation the steam injection was found superior. Above this mode of operation. the operational modes of electric base and continuous were covered by the gas türbine combined with the steam türbine.