Power plants – Combustion products used as motive fluid – Multiple fluid-operated motors
Patent
1978-02-24
1979-11-27
Garrett, Robert E.
Power plants
Combustion products used as motive fluid
Multiple fluid-operated motors
60 3925, 60 3927, 60 3929, F02C 904, F02C 914
Patent
active
041753828
ABSTRACT:
A steam power plant equipped with a pressure-fired boiler which supplies steam to a turbine group includes a charging group for the boiler operating at high pressure ratios comprising a compressor driven by a gas turbine for supply fuel combustion air, the gas turbine being driven by combustion gas discharged from the boiler such that the heat content of the discharged combustion gas is substantially completely consumed in the turbine and the power delivered by it to the compressor. A governor in the live steam feed line from the boiler to the steam turbine group provides a signal by way of a primary control system that (1) regulates fuel flow to the boiler, (2) adjusts the compressor blading and (3) regulates a speed governor for the charging group, and a secondary control system provides a signal dependent upon the position of the speed governor that serves to regulate a bypass at the gas side of the boiler and therefore the amount of combustion gas delivered to the gas turbine. Operation of the control system for the power plant is such with a decrease in load, first the r.p.m. of the charging group is decreased followed by an adjustment of the compressor blading with the r.p.m. being held constant, whereas in the event of an increase in load, first the compressor blading is adjusted followed by an increase in r.p.m. of the charging group.
REFERENCES:
patent: 1927204 (1933-09-01), Doble
patent: 2819732 (1958-01-01), Paetz
patent: 2947466 (1960-08-01), Busquet
patent: 3884036 (1975-05-01), Pfenninger
patent: 3896623 (1975-07-01), Daniels
patent: 3908897 (1975-09-01), Van Holtz et al.
BBC Brown Boveri & Company Limited
Garrett Robert E.
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