Power plants – Combustion products used as motive fluid
Patent
1985-07-22
1990-05-29
Stout, Donald E.
Power plants
Combustion products used as motive fluid
60 393, 60 3953, 60 3955, F02C 700
Patent
active
049284789
ABSTRACT:
A control system for a cogeneration plant measures the flow of steam exceeding the requirements of the steam-using process. Water is injected into the combustion zone of a combustor of the gas turbine portion of the cogeneration system to provide a predetermined reduction in NOx products. The excess steam is added to the output of the compressor portion of the gas turbine to augment the gas turbine power output due to the augmented mass flow. The control system reduces the water injection in proportion to the steam flow to maintain the total water flow to the combustion zone at a level which maintains the preferred level of NOx reduction. In a second embodiment, the excess steam is first injected into the combustion zone with a one-for-one equivalent reduction in water injection. When the excess steam exceeds the amount required for NOx reduction, the excess is added to the output of the air compressor for power augmentation. As the power augmentation steam is added a proportionate reduction is made in the NOx reduction steam to account for the fact that a fraction of the output of the air compressor passes through the combustion zone.
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patent: 3708976 (1973-01-01), Berlyn
patent: 3731485 (1973-05-01), Rudolph et al.
patent: 4259837 (1981-04-01), Russell et al.
patent: 4466241 (1984-08-01), Inui et al.
patent: 4519207 (1985-05-01), Okabe et al.
General Electric Company
Stout Donald E.
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