Gas seal apparatus and method for use in cogeneration applications

A cogeneration system having a gas turbine generator ( 10 ) that provides combustion air via an exhaust to a heat recovery steam generator ( 13 ) has a gas-seal stack ( 19 ) coupled there between. The gas-seal stack ( 19 ) prevents substantial portions of the exhaust gas from exiting there through d...

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Bibliographic Details
Main Author FRANK F. MITTRICKER
Format Patent
LanguageEnglish
Published 28.10.2004
Edition7
Subjects
BLASTING
ENGINE PLANTS IN GENERAL
ENGINE PLANTS NOT OTHERWISE PROVIDED FOR
ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
HEATING
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
METHODS OF STEAM GENERATION
STEAM ACCUMULATORS
STEAM BOILERS
STEAM ENGINE PLANTS
STEAM ENGINES
STEAM GENERATION
WEAPONS
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Summary:A cogeneration system having a gas turbine generator ( 10 ) that provides combustion air via an exhaust to a heat recovery steam generator ( 13 ) has a gas-seal stack ( 19 ) coupled there between. The gas-seal stack ( 19 ) prevents substantial portions of the exhaust gas from exiting there through due to formation of a column of higher density ambient air. This blockage is achieved without resort to mechanical. pneumatic pathway control devices. Conversely, if and when the gas turbine generator ( 10 ) shuts down, ambient air is drawn through the gas-seal stack ( 19 ) and serves to support continued combustion in the heat recovery steam generator ( 13 ). In one embodiment, an induction fan (or fans) ( 16 ) is located at the exhaust of the heat recovery steam generator ( 13 ) such that combustion air is pulled through the heat recovery steam generator ( 13 ) rather than pushed there through. This aids in minimizing backpressure at the exhaust of the gas turbine generator ( 10 ).
Bibliography:Application Number: AU20040230706