Rotary kinetic fluid motors or pumps – Working fluid bypass – Selectively adjustable vane or working fluid control for bypass
Patent
1987-03-02
1988-05-17
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
Working fluid bypass
Selectively adjustable vane or working fluid control for bypass
415 1, 60646, F04D 1500
Patent
active
047447230
ABSTRACT:
A thermal power plant includes a main system in which steam generated in a boiler passes, through a steam regulating valve, a high pressure turbine, a reheater and an intercept valve, into an intermediate pressure turbine and a low pressure turbine. The thermal power plant further has a high pressure bypass system bypassing the steam regulating valve and the high pressure turbine, and an intermediate and low pressure bypass system bypassing the intercept valve and the intermediate and the low pressure tubines. Upon starting the thermal power plant, the steam generated in the boiler is delivered, through the high pressure bypass system, the reheater and the intercept valve, into the intermediate and the low pressure turbines to accelerate the turbines, and after a sinchronous steam supply, the steam is delivered into the high pressure turbine through the steam regulating valve to increase a load imposed on the power plant instead of being delivered into the high pressure bypass system. The method for starting the thermal power plant is characterized in that an opening control of the steam regulating valve is conducted when a reheated steam pressure becomes equal to or lower than a predetermined pressure level as a result of opening of the intercept valve.
REFERENCES:
patent: 3623324 (1971-11-01), Eggenberger
patent: 4003205 (1977-01-01), Matsumura
patent: 4280060 (1981-07-01), Kure-Jensen et al.
patent: 4309873 (1982-01-01), Koran et al.
patent: 4353216 (1982-10-01), Dickenson
Hashimoto Tsuguo
Inui Taiji
Garrett Robert E.
Hitachi , Ltd.
Kwon John T.
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