Liquid heaters and vaporizers – Water tube – Coil
Patent
1984-12-06
1986-04-22
Green, Randall L.
Liquid heaters and vaporizers
Water tube
Coil
122 30, 122 48, 122223, 122339, 122344, 122246, 126362, 110324, 110203, F22B 2100
Patent
active
045834954
ABSTRACT:
A wood-type solid fuel fired water heater of modular construction includes a radiation heat transfer section or module in the form of a first annular or cylindrical side wall of refractory material. A water circulating first coil is embedded in the inner surface of the first annular side wall or cylinder to provide a partial water wall or water jacket in the refractory material. The first annular side wall defines the combustion chamber and locus of combustion for direct radiant heating of water in the first coil. The convection heat transfer section or module is formed by a second annular side wall or cylinder of refractory material positioned above the first annular side wall. A second coil for water circulation is mounted inside the second annular side wall but spaced from the inner surface for circulation of hot flue gas around the second coil for convection heating of water in the second coil. A head section or module is positioned over the convection heat transfer section defining a draft plenum over the convection heat transfer section with a stack outlet. The head section is formed with a central fuel chute for delivering solid fuel such as chunk wood to the combustion chamber and for defining the inner wall of an annular passageway through the convection heat transfer section. The first and second coils are coupled in parallel water circulation loops between a hot water storage tank and the water heater for gravity convection, efficient utilization of wood fuel, and quick recovery of hot water.
REFERENCES:
patent: 100983 (1870-03-01), Clarke
patent: 235275 (1880-12-01), Monsanto
patent: 4278034 (1981-07-01), Reale
Hill Richard C.
Kasper Richard
Pete Arthur R.
Radley David J.
Board of Trustees of the University of Maine
Green Randall L.
Kane, Jr. Daniel H.
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