Cycle improvements to steam injected gas turbines

The efficiency and specific power of the steam injected gas turbine is anal ysed by modelling the thermodynamic cycle. In this model special attention is paid to the blade cooling. The basic cycle as well as cycles with improv ements such as intercooling, heat recovery by regenerator and blade cooling using steam are studied. The different cycles are compared with the combin ed cycle and the intercooled regenerative cycle. The conclusion is that the steam injected cycles have high efficiency and specific power. Adding heat exchangers to the cycle is not beneficial. Using steam as coolant for the blades offers interesting perspectives. Copyright (C) 2000 John Wiley & Son s, Ltd.