Superheater spray flow control for variable pressure operation

Details Superheater spray flow control for variable pressure operation Superheater spray flow control for variable pressure operation

1988-12-22

1990-11-06

Smith, Jerry

Boots, shoes, and leggings

364494, 60667, 122460, 122476, 1224791, G05B 132, F22D 742, F22G 300, F22G 500

Patent

active

049690841

ABSTRACT:
A superheater spray water control system for variable pressure applications produces an output signal representative of expected superheater absorption as a function of measured steam flow, compensates the signal for temperature variations within the superheater and adjusts it for over/under fire transients. An output signal representative of required superheater absorption from the drum to the superheater outlet, together with a spray water enthalpy signal obtained as a function of measured stem flow, is used with the compensated and adjusted actual superheater absorption and measured steam flow signals to produce a spray quantity demand signal.

REFERENCES:
patent: 4027145 (1977-05-01), McDonald et al.
patent: 4241701 (1980-12-01), Morse
patent: 4319320 (1982-03-01), Sato et al.
patent: 4549503 (1985-10-01), Keyes, IV et al.
patent: 4776301 (1988-10-01), Dziubakowski
patent: 4887431 (1989-12-01), Peet

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