Water vapor-condensing secondary heat exchanger

Details Water vapor-condensing secondary heat exchanger Water vapor-condensing secondary heat exchanger

1984-09-28

1986-11-11

Davis, Jr., Albert W.

Heat exchange

With first fluid holder or collector open to second fluid

Separate external discharge port for each fluid

165111, 165921, F28B 908

Patent

active

046216863

ABSTRACT:
A compact secondary heat exchanger, installed in the path of room air through the casing of a gas furnace, utilizes a unitary condensing coil having parallel upper, middle and lower sets of tubes through which the flue gas passes sequentially to a collector manifold, exhausted by a blower. The coil is slanted downwardly from the hot gas manifold. Condensate formed in the first and second sets of tubes flows downward to an intermediate manifold between the first and second sets of tubing, condensate from this intermediate manifold is drained downward to a collector manifold beneath.

REFERENCES:
patent: 774992 (1904-11-01), Otis
patent: 1219535 (1917-03-01), Carroll
patent: 3262489 (1966-07-01), Fritzberg
patent: 3675710 (1972-07-01), Ristow
patent: 4141410 (1979-02-01), Takada
patent: 4202405 (1980-05-01), Berg
patent: 4241874 (1980-12-01), Schossow

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