Generator rotor inlet air temperature range

What is rotor inlet temperature?

Rotor inlet temperature (RIT): this term is sometimes used in North America, and means the same as SOT. Combustor outlet temperature (COT): this is the temperature at the first turbine nozzle guide vane leading edge. Turbine entry temperature (TET): this can have either of the above meanings.

What is a good air temp for a generator?

For a generator, the internal inlet air temperature is typically 35-40 degrees Celsius higher than the ambient temperature. This is known as the Overdesign Temperature Rise (ODP). The generator does not require any de-rating for single-wall applications with typical cooling water temperatures of 32 degrees Celsius.

What are the requirements for a gas turbine inlet temperature regulator?

The gas turbine inlet temperature regulator has strict requirements for the resistance of the air flow outside the tube. Generally, the operating resistance is required to be controlled below 150 Pa, which requires that the air flow speed should not be too high.

What is a low pressure gas turbine rotor?

The low-pressure or power turbine rotor is mechani-cally separate from the high-pressure turbine and compressor rotor. The low pressure rotor is said to be aerodynamically coupled. This unique feature allows the power turbine to be operated at a range of speeds and makes two-shaft gas turbines ideally suited for variable-speed applications.

Can a direct cooled rotor uprate a gas turbine?

The same applies to a direct-cooled con-version or a replacement rotor with perhaps more uprate capability. It has been common to support a gas turbine or steam turbine uprate by taking advantage of the existing generator margin (i.e., just operate the generator at a higher power factor than origi-nally designed).

What is generator rotor thermal sensitivity?

GER-3809 (Generator Rotor Thermal Sensi-tivity—Theory and Experience) covers genera-tor field thermal sensitivity in great detail. The type and extent of contamination to be expected in a generator primarily depends upon its cooling configuration. A hydrogen-cooled generator is well sealed and should see very little contamination.