POWER GENERATING METHOD FOR GAS TURBINE

摘要

PURPOSE:To improve the thermal efficiency by utilizing a part of steam produced by a waste heat boiler for cooling blades so as to allow the rest of the steam to be mixed with combustion gas. CONSTITUTION:An intermediate cooler 15 is provided between an intermediate pressure compressor 12 and a high pressure compressor 13. Heat is exchanged by a regenerative preheater 33 between air from the high pressure compressor 13 and air from a low pressure compressor 32. A part of steam produced by a waste heat boiler 66 is utilized to cool blades of the high pressure turbine 31, and is subsequently fed into combustion gas. And then the rest of the steam is allowed to flow into a combustor 20 so as to be mixed with combustion gas. This configuration enables the thermal efficiency of a cycle to be improved.