Power plants – Motive fluid energized by externally applied heat – Process of power production or system operation
Patent
1979-12-19
1982-01-12
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Process of power production or system operation
60652, 60662, 60657, F01K 1300
Patent
active
043098738
ABSTRACT:
Method and apparatus to limit and control rotational loss heating such as occurs in a large steam turbine in the bypass mode of operation under no-load and low-load operating conditions. According to the invention, a portion of the high pressure bypass steam is admitted to the lower pressure sections of the turbine to provide motive fluid for driving the turbine while, simultaneously, a second portion of the high-pressure bypass steam is admitted to the high-pressure section of the turbine in a reverse-flow direction to pass backwards therethrough and limit the rotational loss heating. The two flows may be proportioned to control rotational loss heating in both the high-pressure and lower pressure sections of the turbine. A reverse-flow valve and a ventilator valve are provided for routing the reverse-flow of steam.
REFERENCES:
patent: 3919846 (1975-11-01), Lecocq
patent: 4118935 (1978-10-01), Andersson
patent: 4132076 (1979-01-01), Weiss
patent: 4254627 (1981-03-01), Gruber et al.
vol. 35, Proceedings of the American Power Conference, "Bypass Stations for Better Coordination Between Steam Turbine and Steam Generator Operation"-P. Martin et al.
Koran Kenneth W.
Parry William T.
Ahern John F.
Austin Ormand R.
General Electric Company
Ostrager Allen M.
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