Combustion product condensing water heater

Details Combustion product condensing water heater Combustion product condensing water heater

1980-05-16

1983-09-13

Makay, Albert J.

Liquid heaters and vaporizers

Subsidiary

165125, 165134DP, 122 33, F22B 3300

Patent

active

044035721

ABSTRACT:
In a water heating system, vapor in the products of combustion gases is condensed in a secondary heat exchanger positioned in a housing with the primary heat exchanger and combustion chamber. The two heat exchangers are coaxial coils with the secondary coil positioned below the primary. Gases flow radially through the primary coil and then axially through the secondary coil at an increased velocity. The gases are then used to pre-heat a gas/air mixture in a third heat exchanger within the secondary heat exchanger. The pre-heated gas/air mixture is burned in a burner within the primary heat exchanger and the gas products are drawn through the exchangers by a blower. A water storage tank is designed to enhance stratification of hot water over cooler water. The cooler water is used to condense vapor in the secondary heat exchanger.

REFERENCES:
patent: 2327339 (1943-08-01), Chandler
patent: 3896992 (1975-07-01), Borovina et al.
patent: 4163430 (1979-08-01), Neumann
patent: 4222350 (1980-09-01), Pompei et al.
patent: 4227647 (1980-10-01), Eriksson
patent: 4253446 (1981-03-01), Muller
Smay, V., High Efficiency Home Heating, Popular Science Nov. 1979, pp. 60, 62, 65, 158, 162, 164.
Boston Gas Products, "Heat Maker Brochure", 1980.
Hydro Therm, "Hydro Pulse Brochure", A1-379.

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