Dehumidifying heat exchanger apparatus

Heat exchange – With first fluid holder or collector open to second fluid – Separate external discharge port for each fluid

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Details

1651091, 165900, 165913, F28B 102

Patent

active

050565931

ABSTRACT:
Dehumidifying heat exchanger apparatuses are disclosed in several variations which may economically condense and separate a potable water product from a humid air stream. Water product extraction yields may be substantially enhanced by new uses of electrostatic and magnetic fields. Liquid water droplets are electrostatically collected on grounded or charged heat transfer tubes in the heat exchanger apparatuses. In one variation, charged or grounded horizontally-declined heat transfer tubes with attached drainage wicks attract liquid droplets and accelerate condensing heat transfer by continuous absorption and transfer of condensate. Both cascading liquid droplets and aerosol injection of fine liquid droplets may be used to provide convenient seed nuclei for condensing attachment of water vapor molecules in other variations. Water vapor molecules may be electrostatically stabilized in a polar orientation between charged electrodes and oppositely-charged or grounded heat transfer tubes, then impelled by magnetic forces onto heat transfer surfaces as a thin condensing film. A simplified closed cycle heat transfer system is disclosed which may economically reject condensing heat to atmosphere. The heat exchanger apparatuses may operate with considerable energy economies, since substantial moisture separation may occur without any need to cool an entire air stream to below local saturation or dew point temperatures. Forms of the invention may collect potable water from humid air in water-short regions, dehumidify air in air conditioning apparatuses, separate out condensable vapor pollutants in air pollution control equipment and separate condensable vapors from gaseous fluids in chemical processes.

REFERENCES:
patent: 1451334 (1923-04-01), Ginabat
patent: 4548262 (1985-10-01), Hull

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