Adaptive control technique for steam generator cleaning

Details Adaptive control technique for steam generator cleaning Adaptive control technique for steam generator cleaning

1989-07-07

1990-01-16

Favors, Edward G.

Liquid heaters and vaporizers

Cleaning

165 84, 165 95, F22B 3718, F22B 3748

Patent

active

048935883

ABSTRACT:
An adaptive control technique, in which the duty cycle of a vibrational cleaning device for the heat exchange surfaces of a steam generator is automatically adapted to the current state of dirt accumulation on the surfaces. To ascertain the degree of dirt accumulation, the number of strokes of the drive cylinder of a fluidic actuator of the vibrational device is measured in a short interval at the beginning of each cleaning cycle and compared with a reference value. The cleaning cycle length or vibration period within the cycle is either lengthened or shortened commensurate with the results of the comparison and in this way the duty cycle of the vibrational device is continuously adapted to the current need for cleaning.

REFERENCES:
patent: 3835817 (1974-09-01), Tuomaala
patent: 4653578 (1987-03-01), Horning

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