Apparatus for efficiently controlling the operation of parallel

Details Apparatus for efficiently controlling the operation of parallel Apparatus for efficiently controlling the operation of parallel

1985-01-09

1986-07-08

Makay, Albert J.

Liquid heaters and vaporizers

Automatic control of fluid fuel and water

Once through

122447, 122504, 1225042, 236 21R, 236 46R, F22B 3742, F22D 536

Patent

active

045986681

ABSTRACT:
There is disclosed a control apparatus for operating any one of a plurality of parallel connected boilers as a lead boiler, with the others operating as lag boilers. The control apparatus enables a lag boiler to assist the lead boiler during a prolonged operating period to share the burden and the therefore prolong equipment life and increase system efficiency. The control apparatus enables each boiler to serve as the lead boiler while employing full modulation, other boilers such as the lag boiler also employ full modulation. The control apparatus also causes an automatic switch over between boilers after a malfunction of one of the boilers in a rapid time.

REFERENCES:
patent: 2416781 (1947-03-01), Thomson
patent: 3387589 (1968-06-01), Chan et al.
patent: 3572587 (1971-03-01), Oldenburg
patent: 4007713 (1977-02-01), DeLeonardis et al.
patent: 4421068 (1983-12-01), Aral
patent: 4498428 (1985-02-01), LeSpisa et al.

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