Power plants – Combustion products used as motive fluid – Combined with regulation of power output feature
Patent
1980-02-25
1982-01-12
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
Combined with regulation of power output feature
417 43, F02C 926
Patent
active
043098711
ABSTRACT:
In an air compressor-driven system, wherein compressed air and fuel are combined in a combustion chamber to produce hot gas for driving a turbine which then rotates the air compressor, surge is prevented by sensing an appropriate parameter, such as the flow rate of the compressed air at the compressor discharge outlet, and developing therefrom a feedback signal which varies the fuel flow to the combustion chamber to dynamically vary the compressor speed (and hence capacity) so that the discharge pressure versus discharge flow rate characteristic curve of the compressor always has a negative slope at the operating point, regardless of where that point is located on the curve. By providing a negative slope at all operating conditions, even when operating in the surge region of the pressure-flow plot, the system is incapable of surge. In order to satisfy variable load requirements, the fuel flow is adjusted, in response to the load on the system, to establish the flow rate of the compressed air at the required steady state level, either within or without the surge region.
REFERENCES:
patent: 2371889 (1945-03-01), Hermitte
patent: 3002349 (1961-10-01), Arnett et al.
patent: 3006144 (1961-10-01), Arnett et al.
patent: 4177649 (1979-12-01), Venema
Borg-Warner Corporation
Casaregola Louis J.
Tracy James E.
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