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A heater device applied in a desiccant rotor dehumidifier for supplying
regeneration hot air to the desiccant rotor comprises a metal case
having an air inlet and an air outlet; heating elements supported
by insulative material and mounted adjacent to the desiccant rotor;
and an insulative plate installed in parallel to the heating elements
and parting the heating elements with the air inlet. The insulative
plate is formed with a plurality of via holes suitably distributed
for the intake air coming from the air inlet passing through, being
heated by the heating elements and evenly passing the desiccant
rotor through the air outlet. The insulative plate also splits and
bypasses a part of the intake air to cool down the desiccant rotor
that has been heated and regenerated.
A method for conditioning air for an enclosure in which a supply
air stream is cooled with a refrigerant system containing a variable
compressor by passing the air over a cooling coil to reduce the
temperature thereof; the thus cooled supply air stream is then passed
through a segment of a rotating desiccant wheel under conditions
which increase its temperature and reduce its moisture content,
and then delivered to the enclosure. The desiccant wheel is regenerated
by heating a regeneration air stream with the condensing coil of
the refrigerant system, and then passing the heated regeneration
air stream through another segment of the rotating desiccant wheel.
At least one condition of the supply air stream, the regeneration
air stream, and/or the refrigerant system is sensed or monitored
and the output of the compressor is controlled in response to the
sensed condition.
A method and system for climate control uses a desiccant in an
automobile. The desiccant removes humidity or moisture from air
passing through the ventilation system. The desiccant is recharged
or dried by application of a vacuum. The lower pressure generated
by the vacuum reduces the temperature at which water evaporates
or boils off of the desiccant material.
The present invention provides a method and apparatus for extracting
liquid water from moist air using minimal energy input. The method
can be considered as four phases: (1) adsorbing water from air into
a desiccant, (2) isolating the water-laden desiccant from the air
source, (3) desorbing water as vapor from the desiccant into a chamber,
and (4) isolating the desiccant from the chamber, and compressing
the vapor in the chamber to form liquid condensate. The liquid condensate
can be removed for use. Careful design of the dead volumes and pressure
balances can minimize the energy required. The dried air can be
exchanged for fresh moist air and the process repeated. An apparatus
comprises a first chamber in fluid communication with a desiccant,
and having ports to intake moist air and exhaust dried air. The
apparatus also comprises a second chamber in fluid communication
with the desiccant. The second chamber allows variable internal
pressure, and has a port for removal of liquid condensate. Each
chamber can be configured to be isolated or in communication with
the desiccant. The first chamber can be configured to be isolated
or in communication with a course of moist air. Various arrangements
of valves, pistons, and chambers are described.
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