Two pressure - a gas turbine system with partial regeneration and steam injection

摘要

PROBLEM TO BE SOLVED: To reduce exergy loss at an exhaust heat recovery part and increase power generating efficiency by increasing a drive steam pressure head without reducing an amount of generated steam.;SOLUTION: This gas turbine bleeds a part of air compressed by a compressor 2 before a combustor 3, mixes the bleed air with steam, overheats by turbine exhaust heat, and injects the mixed gas into the combustor 3. In this ease, a ratio of bleed air/steam is increased by using high-pressure steam as a driving fluid of a first mixing equipment 22 for compressing bleed air, followed by mixing of a low-pressure steam from a low-pressure exhaust heat boiler with the mixed gas comprising the bleed air and the steam in a second mixing equipment, overheating with the turbine exhaust heat in a superheater 6, and injection into the combustor 3.;COPYRIGHT: (C)2001,JPO