Economizer

Details Economizer Economizer

1980-04-01

1982-03-09

Yuen, Henry C.

Liquid heaters and vaporizers

Subsidiary

122420, 122421, 122412, 165134DP, F22B 3300, F22D 102

Patent

active

043183662

ABSTRACT:
A boiler economizer includes a first heat exchanger disposed in a boiler flue and a second heat exchanger which is external. Boiler feedwater is delivered in series to the first and second heat exchangers before passage to the boiler. A flow controller directs a first portion of the boiler feedwater directly to the first heat exchanger and a second portion is first delivered through the second heat exchanger where it is passed in a heat exchange relation with the feedwater exiting the first heat exchanger. The flow controller is positioned by a temperature transponder which is responsive to the temperature of the discharge flue gases and the feedwater entering the first heat exchanger.

REFERENCES:
patent: 2594471 (1952-04-01), Marshall
patent: 2699759 (1955-01-01), Kuhner
patent: 2769619 (1956-11-01), Juhasz
patent: 4137965 (1979-02-01), Fallon, Jr. et al.
patent: 4173949 (1979-11-01), Roethe
patent: 4211187 (1980-07-01), Farris

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