Method of warming up a reheat turbine

Details Method of warming up a reheat turbine Method of warming up a reheat turbine

1986-04-11

1987-03-24

Ostrager, Allen M.

Power plants

Motive fluid energized by externally applied heat

Process of power production or system operation

F01K 1302

Patent

active

046515321

ABSTRACT:
In a reheat turbine employing an intermediate pressure steam turbine starting system, a former stage (10a) of a high pressure steam turbine (10) is warmed up by a high temperature steam during the starting of an intermediate pressure steam turbine (50) while a latter stage (10b) of the high pressure steam turbine (10) is kept in vacuum. The high temperature steam is introduced through a warm-up steam valve (75) branched off from a steam pipe (43) for steam inflowing into an intermediate pressure turbine steam chamber (29). The high temperature steam that has warmed up several stages reaches a latter stage (10b) and is discharged into a condenser (54) through a ventilation valve (85) and a steam pipe (87). The former stage (10a) is positively warmed up by the high temperature steam to reduce the mismatch quantity. The high pressure steam turbine (10) is maintained warming up by the high temperature steam and cooling by vacuum during the start of the intermediate pressure steam turbine (50 ).

REFERENCES:
patent: 4226086 (1980-10-01), Binstock et al.
patent: 4584836 (1986-04-01), McClelland

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