Method and apparatus for regulating fluid flows in parallel-conn

Details Method and apparatus for regulating fluid flows in parallel-conn Method and apparatus for regulating fluid flows in parallel-conn

1982-03-08

1984-05-22

Cline, William R.

Heat exchange

Regenerator

Checker brick structure

165 32, 165 35, 165 36, 165 38, 165 40, 110162, G05D 2300, G05D 1500, B60H 100, F28F 2700

Patent

active

044495692

ABSTRACT:
Fluid flow in parallel-connected conduits is regulated by sensing the pressures and/or temperatures at the junctions of the conduits, and regulating the supply of power to a fluid propelling means operable in one of the conduits in accordance with a signal which is representative of the sensed pressure drop and/or temperature drop between the junctions. In a furnace installation having an air preheater (14) in a duct (12) and a parallel-connected by-pass duct (18), the pressure difference and/or temperature difference between the junctions (19, 20) of the ducts (12, 18) is/are employed to generate a signal which regulates the supply of power to an induced draft fan (17) in the air preheater duct (12). The damper (21) normally provided in the by-pass duct (18) may be removed or set at its open position.

REFERENCES:
patent: 1927215 (1933-09-01), Peebles
patent: 2570859 (1951-10-01), Rasmussen
patent: 3813039 (1974-05-01), Wells
patent: 4012191 (1977-03-01), Lisankie et al.
patent: 4044605 (1977-08-01), Bratthall
patent: 4257395 (1981-03-01), Wieder
patent: 4291750 (1981-09-01), Clyne et al.
patent: 4371027 (1983-02-01), Jacobsen
patent: 4381814 (1983-05-01), Funk

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