Heat exchange – With first fluid holder or collector open to second fluid – Separate external discharge port for each fluid
Patent
1979-10-03
1981-03-10
Richter, Sheldon
Heat exchange
With first fluid holder or collector open to second fluid
Separate external discharge port for each fluid
122441, 165134R, 165160, 165163, F28B 910, F28F 922
Patent
active
042548250
ABSTRACT:
A multitubular heat exchanger used as a feedwater heater in a power generating plant and the like includes a shell, a high temperature tube bundle and a low temperature tube bundle composed of a multiplicity of U-shaped heat transfer tubes arranged in the shell and a vent tube interposed between the two tube bundles. A laterally-closed flow passage is defined in at least one of the high temperature tube bundle and the low temperature tube bundle to induce part of a heating medium flowing between the shell and the tube bundle to flow to a position deep in the tube bundle and near the vent tube, so that a noncondensable gas stagnating zone formed in the tube bundle can be moved near to the vent tube and noncondensable gas can be removed from the shell by extraction through the vent tube.
REFERENCES:
patent: 1764716 (1930-06-01), Ehrhart
patent: 2180840 (1939-11-01), Tuley et al.
patent: 3349841 (1967-10-01), Stoker
patent: 3795273 (1974-03-01), Brigida et al.
patent: 3938588 (1976-02-01), Coit et al.
"Operational Experience with Heat Exchangers in Nuclear Power Stations with Light Water Reactors", by H. Baschek and E. Kocouiek, Combustion, 9-75, pp. 14-23.
Hitachi , Ltd.
Richter Sheldon
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