Steam generator control systems

Details Steam generator control systems Steam generator control systems

1984-12-31

1993-08-24

Ostrager, Allen M.

Power plants

Combustion products used as motive fluid

Multiple fluid-operated motors

60665, 60667, F01K 1302

Patent

active

052378160

ABSTRACT:
Control systems (or controllers) for once through, unfired steam generators (or boilers) which control a single parameter--the feedwater flow to the boiler--in accord with an energy or enthalpy balance between the hot gases supplied to the boiler and the steam generated in it. These control systems have a predictive mode of feedwater control and, optionally, an operator selectable, feedback mode to compensate for drifts in the predictive mode. Other corrections may also be made, and predictive and corrective flow splits can be provided to obtain maximum efficiency when the control system is utilized to regulate the operation of a dual pressure boiler.

REFERENCES:
patent: 3306044 (1967-02-01), Michel et al.
patent: 3488961 (1970-01-01), Gerber
patent: 4353215 (1982-10-01), Anderson et al.
patent: 4445462 (1984-05-01), Mastronarde
Wardall et al., "The Outlook for Combined Cycle Efficiency with Small Turbines"; Energy Processing/ Canada Mar.-Apr. 1976.

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