Method and apparatus for utilizing waste heat in hot water heate

Details Method and apparatus for utilizing waste heat in hot water heate Method and apparatus for utilizing waste heat in hot water heate

1987-07-24

1989-04-18

Warner, Steven E.

Liquid heaters and vaporizers

Subsidiary

122 16, 122 20B, 122169, 126362, 237 19, F22B 3000

Patent

active

048216828

ABSTRACT:
Normally wasted heat from the pilot burner and flue of a fuel fired hot water heater is used to preheat the water supplied to the main tank. An auxilliary storage tank receives incoming cold water. Water from the storage tank circulates through a conduit loop which extends in a spiral pattern through the flue and also through a special heat exchanger which concentrates heat generated by the pilot burner. The water that is preheated in the conduit loop is returned to the storage tank for storage until required by the main tank, at which time the preheated water is delivered to the main tank through a transfer conduit. Alternative embodiments are arranged to effect automatic flushing of the conduit loop when hot water is withdrawn from the main tank.

REFERENCES:
patent: 2814279 (1957-11-01), Thomas
patent: 3007470 (1961-11-01), Heeger
patent: 4106692 (1978-08-01), Baier
patent: 4178907 (1979-12-01), Sweat, Jr.
patent: 4344568 (1982-08-01), Stewart et al.
patent: 4371111 (1983-02-01), Pernosky
patent: 4699091 (1987-10-01), Waters

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