Aircel DHT-100, Инструкция по установке и эксплуатации

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Design Parameters
Type of dryer: Refrigerated
Power supply: 115, 230 Volt / single phase / 60Hz
Refrigerant type: R-134A
Chemical Composition: HFC
Parameter
Description
Optimum Maximum Minimum
Air Pressure
(PSIG)
150-175 200 80
Air Inlet
Temperature (°F)
100-180 200 40
Ambient
Temperature (°F)
75 100 32
Suction Gauge
Reading (psig)
28-40 60 28
Discharge Gauge
Reading (psig)
160-250 350 80
Evaporator
Temperature (°F)
38-42 60 33
Description
System
A broad range of non-cycling refrigerated
compressed air dryers from 10 to 10,000 scfm is
offered. The High Inlet Temperature Refrigerated
Air Dryer series covers a flow range from 20 to
125 scfm providing reliable, constant dew point
performance in all flow conditions. Through
optimization of critical dryer components – heat
exchanger, separator, and condensate removal – the
system ensures the highest performance at full-
and partial-load conditions. R-134a refrigerant
is used in all refrigerated compressed air dryers
as standard. R-134a is the industry’s preferred
choice because of its 0.0 ozone depletion factor and
global warming potential. R-134a is a one-blend
refrigerant providing consistent performance (no
temperature glide) and easy service (no mixture of
different refrigerants).
Hot saturated air enters the air-to-air heat
exchanger of the High Inlet Temperature
Refrigerated Air Dryer and is precooled by the
outgoing dry air. Precooling saves energy by
reducing the heat load on the dryer’s compressor.
The cool saturated air enters the air-to-refrigerant
heat exchanger where air temperature is lowered
to the 48 to 50°F range. This dramatic temperature
drop condenses water and oil.
The mixture of cold air and condensation then
flows into the two-stage separator filter where
liquids and contaminants are removed by
centrifugal action, directional flow change, and
velocity reduction. Once bulk liquids have been
removed, the compressed air goes through a
stainless steel mist eliminating filter that coalesces
oil aerosols and oil vapors within the 50-micron
range, and then separates and removes them. At
this point, the compressed air is dry and virtually
oil-free.
Cold, dry air exits through the precooler heat
exchanger and is reheated by incoming hot air.
Reheating restores energy and also prevents
condensation from forming on the outside of air
distribution piping. In the refrigeration unit, the
compressor pumps hot, high-pressure gaseous
refrigerant to the condenser where it is cooled
and liquefied by ambient air. From the condenser,
liquid refrigerant first flows through the receiver,
then through a filter/dryer, and finally through the
expansion valve where pressure and temperature
are reduced. This reduction in pressure causes
the liquid refrigerant to boil until it reaches the
saturation temperature that corresponds to its
pressure. As the low-pressure refrigerant passes
through the evaporator, heat flows from the
compressed air to the refrigerant, causing the
boiling to continue until all refrigerant is vaporized.
Refrigerant gas is returned to the compressor and
the cycle is repeated. A hot gas by-pass valve is used
to control temperature in the evaporator.
Aircel DHT Series - Models 20 - 125