Advanced steam temperature control

Details Advanced steam temperature control Advanced steam temperature control

1987-03-12

1988-10-11

Favors, Edward G.

Liquid heaters and vaporizers

Steam treatment

Automatic heat regulation of superheater

165 13, F22G 500

Patent

active

047763019

ABSTRACT:
A control system for a heat exchanger, such as a superheater in a fossil fuel fired steam generator, uses a multivariable non-linear regression equation to develop a feed forward signal that continuously adapts itself to changes in system variables to adjust the enthalpy of the steam entering the superheater and maintain a substantially constant enthalpy of the steam discharged from the superheater. The system develops a feedback signal responsive to changes in the temperature of the steam discharged from the superheater to readjust the enthalpy of the steam entering the superheater as required to maintain the steam leaving the superheater at a predetermined set point temperature.

REFERENCES:
patent: 4241701 (1980-12-01), Morse
patent: 4296730 (1981-10-01), Zadiraka
patent: 4549503 (1985-10-01), Keyes, III et al.
patent: 4637348 (1987-01-01), Fukayama

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