F - Mech Eng,Light,Heat,Weapons – 01 – K
Patent
F - Mech Eng,Light,Heat,Weapons
01
K
60/43
F01K 23/04 (2006.01) F01D 5/18 (2006.01) F01K 23/10 (2006.01) F02C 6/00 (2006.01) F02C 6/18 (2006.01) F02C 7/16 (2006.01)
Patent
CA 1160463
REHEAT GAS TURBINE ABSTRACT The invention relates to apparatus for generating useful power and to a process for generat- ing useful power by reheating gas turbine exhaust gases to directly generate power, or alternatively, by reheating the exhaust gas to directly generate power and further reheating superheated steam by heat exchange for combined gas reheat and steam superheat- ing with optional steam reheating as well. Steam-cooling with a steam thermal barrier for vanes and blades in a gas generator (36, 30A) or power turbine (42) offers advantages over cooling with air or water at the higher temperatures characte- ristic of the high temperature turbine technology gas turbines coupled with the reheat steam cycle. Consequently, higher cycle efficiency is obtainable for turbine (42) initial firing temperatures of about 2500°F (1371°C) and 2050°F (1121°C) reheat tempera- tures where over-all combined cycle degradation resulting from steam cooling is below about 1%. A turbine (42) having steam-cooled components can operate at a cycle pressure ratio of about 38 without intercooling and can include steam superheating in the reheat combustor (90).
337963
Abb Power Generation Ltd.
Macrae & Co.
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