Combustion dynamics control for variable fuel gas composition an

Details Combustion dynamics control for variable fuel gas composition an Combustion dynamics control for variable fuel gas composition an

1998-04-08

2000-07-04

Freay, Charles G.

Power plants

Combustion products used as motive fluid

60 39281, 60736, F02C 900

Patent

active

060820926

ABSTRACT:
An actual Wobbe Index is calculated for a turbine and compared to a reference Wobbe Index. By comparing the actual and reference Wobbe Indices and recognizing that the reference Wobbe Index has acceptable combustion dynamics, a measure of the combustion dynamics of the operating turbine can be obtained. To lower the possibility of combustion dynamics, causing combustor distress, a feedback signal is provided to change the temperature of the fuel gas provided the combustor. Since the Wobbe Index is a function of temperature and fuel composition, the variation in temperature can be effected to change the Wobbe Index to a reference Wobbe Index having known low combustion dynamics.

REFERENCES:
patent: 4735052 (1988-04-01), Maeda et al.
patent: 4993221 (1991-02-01), Idelchik
patent: 5423175 (1995-06-01), Beebe et al.
patent: 5487265 (1996-01-01), Rajamani et al.
patent: 5845481 (1988-04-01), Briesch et al.

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