Apparatus and method for burning a combustible gas, and a heat exchanger for use in this apparatus
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United States of America Patent
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Feb 10, 1987
Issued Date -
N/A
app pub date -
Sep 9, 1985
filing date -
Jul 20, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus functioning as a high-efficiency water heater. This apparatus passes a combustible mixture of gas and air from an impeller into the hollow interior of a cylindrical gas burner. The combustible mixture flows out through apertures in the cylindrical walls of the gas burner and is burned on a cylindrical flame holder as it emerges; the size of the apertures prevents flash-back of the flames of the combustible mixture into the gas burner. Heat is transferred from the flame to the walls of a cylindrical combustion chamber surrounding the gas burner and the combustion products generated pass to a heat exchanger comprising a vertical riser and a downwardly extending helical section which ensures maximum heat transfer to water in a tank surrounding the combustion chamber and heat exchanger. Hot water is discharged from the tank as needed for domestic uses and to another heat exchanger in an air heating duct.
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