Apparatus for the rapid startup and rapid increase in output of a gas turbine plant
AssigneeAlstom (Switzerland) Ltd
InventorsRichard Blatter, Erhard Liebig
Life of this patent
Estimating the term…
Abstract
The startup time or the output gradient of a gas turbine plant during startup are limited by the maximum permissible temperature gradient. The increase in the fuel mass flow supplied, if appropriate in combination with the combustion-air mass flow supplied, is consequently also limited. In order to accelerate the startup and to increase the output gradient during startup, then, an additional working medium, for example water or steam, increasing the mass flow flowing through the turbine is supplied at the same time as the fuel mass flow and/or combustion-air mass flow. The output gradient is therefore increased with the maximum permissible temperature gradient remaining the same, so that a required output is reached more rapidly.
Claims5
An apparatus comprising:
- a compressed-air source,
- a combustion chamber and a turbine, said turbine having an inherent maximum permissible positive temperature gradient dependent upon design features of the turbine,
- a fuel line for supplying a fuel to the combustion chamber,
- a working medium line for supplying an additional working medium selected from at least one of cold water, warm water, hot water, saturated water, wet steam, saturated steam or superheated steam to the turbine, and
- a regulator for controlling respective mass flows through the fuel line and the working medium line as a function of a stored value of the maximum permissible positive temperature gradient of the turbine such that the maximum permissible positive temperature gradient is not exceeded during operation of the turbine.
A combined-cycle power station having a gas turbine plant, wherein said gas turbine plant includes a compressed-air source,
- a combustion chamber and a turbine, said turbine having an inherent maximum permissible positive temperature gradient,
- a fuel line for supplying a fuel to the combustion chamber,
- a working medium line for supplying an additional working medium selected from at least one of cold water, warm water, hot water, saturated water, wet steam, saturated steam or superheated steam to the turbine, and
- a regulator for controlling respective mass flows through the fuel line and the working medium line as a function of a stored value of the maximum permissible positive temperature gradient of the turbine such that the maximum permissible positive temperature gradient is not exceeded during operation of the turbine, and said combined-cycle power station further including a generator and a heat recovery steam generator heated by waste gas from the turbine and a steam turbo set, wherein the additional working medium is extracted from the water/steam circuit of the combined-cycle power station.
Dependencies are inferred from the claim text.