Method and system for controlling boiler superheated steam tempe

Details Method and system for controlling boiler superheated steam tempe Method and system for controlling boiler superheated steam tempe

1982-04-27

1984-01-17

Ostrager, Allen M.

Power plants

Motive fluid energized by externally applied heat

Process of power production or system operation

60660, 60667, F01K 1302

Patent

active

044257627

ABSTRACT:
A method and system for the temperature control of superheated steam in a power plant having a boiler coupled to a turbine, and a turbine bypass valve, wherein temperature control is achieved by regulating opening of the turbine bypass valve. To this end, process quantities indicative of the superheated steam temperature at the boiler outlet, the superheated steam pressure, the turbine inlet temperature, the turbine inner wall metal temperature, and the degree of opening of the turbine bypass valve are fed into a control system in which a mismatch temperature capable of leading steam into the turbine is calculated on the basis of such received process quantities. Then the control system outputs opening or closing operation command signals to the turbine bypass valve. The method is suitable to be carried out by means of a microprocesser.

REFERENCES:
patent: 4329592 (1982-11-01), Wagner et al.
patent: 4355514 (1982-10-01), Reifenberg

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