Recuperative heating system

Details Recuperative heating system Recuperative heating system

1976-09-07

1977-09-13

Sprague, Kenneth W.

Furnaces

With fuel treatment means

Preliminary refuse treatment means

165155, 432201, 432223, F23L 1504

Patent

active

040474909

ABSTRACT:
A recuperative heating system has a heat conductive chimney flue; a fuel combustion chamber exhausting hot waste gases and smoke upwardly through the flue; coaxial ducts about the flue, defining a fresh air flow path downwardly from a cool air intake along the outer duct and upwardly along the inner duct into direct heat exchange relationship with the outer surface of the flue and exhausting outwardly from the inner duct into a warm air room vent; and a plurality of U-shaped conduit tubes, each having its bight within the flue. The legs of each U-shaped tube are of different lengths with the inlet end on the longer leg opening into the outer duct and the outlet end on the shorter leg opening into the inner duct.

REFERENCES:
patent: 3238902 (1966-03-01), Escher
patent: 3346042 (1967-10-01), Seehausen
patent: 3407870 (1968-10-01), Braune et al.
patent: 3446279 (1969-05-01), White et al.
patent: 3829285 (1974-08-01), Beck

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