F - Mech Eng,Light,Heat,Weapons – 01 – D
Patent
F - Mech Eng,Light,Heat,Weapons
01
D
F01D 19/00 (2006.01) F02C 7/26 (2006.01) F04D 27/02 (2006.01)
Patent
CA 2300606
The start operation of the gas turbine starting method is improved with bleed valves being first throttled, then fully opened and then fully closed at 90% speed, thereby fluid unstableness phenomenon is suppressed and starter motor power is reduced. While inlet guide vane (11) and variable stator vanes (C1 to C5) are opened to predetermined settings from starting to rated speed, bleed valves (1, 2, 3) are open to a predetermined setting until speed is elevated to 52% for the bleed valve (1) and until a speed is elevated to 51% each for the bleed valves (2, 3). Then the bleed valves (1, 2, 3) are fully opened until the speed exceeds 90%, when they are fully closed for rated operation. In the prior art, the starting operation is done with bleed valves being first fully opened until the speed is elevated to 90% and then fully closed. In the present invention, the air discharged into the ambient air can be reduced and thereby starter motor power can be also reduced.
Arimura Hisato
Seki Naoyuki
Mitsubishi Heavy Industries Ltd.
Riches Mckenzie & Herbert Llp
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