낮은 압력강하와 높은
부하에도 원활한 운전성능 환경친화적인 냉매 R134a 사용 최소 냉각체적의 고효율 열교환기 다양한 조건에 따른 대응과 신뢰성 다양한 부하운전시 에너지 절감을 위한
독특한 열저장
QPCD
- CYCLING DRYER, QPNC - NON-CYCLING
Cycling & Non-Cycling
, Designs -- Optimum, System Efficiency
Two Valve Balanced,
Non-Cycling Control System High-Performance Heat
Exchangers Electronic Timer Drain
Microprocessor-Based
Digital Master Control Industrial-Duty Refrigeration
Condenser Balanced Refrigeration
Components Powder-Coated Cabinets
CYCLING
AND NON-CYCLING DRYERS
Quincy refrigerated air dryers
purify compressed air by chilling
the air to approximately +37°F.
The lower compressed air temperatures
cause entrained moisture to condense.
The condensed
moisture carries airborne dirt
and oil to the separator where
it is removed from the air stream
by an automatic drain.
Plant equipment will run better
and processes more efficiently
when operated with clean compressed
air. Payback starts immediately
upon startup.
To customize the total air system
for optimum efficiency, Quincy
provides both Cycling and
Non-Cycling refrigerated air dryers.
Cycling dryers are of particular
interest for larger systems with
fluctuating loads, whereas Non-Cycling
dryers are typically best suited
for smaller systems or
systems expecting fairly constant
loads. Either way, one need not
look any further than Quincy for
time-proven and reliable compressed
air dryers.
QPCD
- CYCLING DRYER OPERATION
Quincy Chilled Mass Cycling Dryers
save energy by cycling the refrigeration
system On & Off in
response to demand. A three-stage heat
exchanger system is employed to provide
the cold storage necessary for cycling
operation. Dual thermostats ensure proper
cycling at all load conditions, provide
tight dew point control, and prevent
freeze ups.
The 1st thermostat signals the refrigeration
compressor to cycle on and off in direct
response to
the coldest air temperature exiting
the evaporator.
In order to prevent freeze ups during
no load conditions, a 2nd thermostat,
set a few degrees
lower, signals the refrigeration compressor
to cycle on and off in response to the
chilled mass temperature.
Contaminated compressed air flows into
shell side of the 1st stage air-to-air
heat exchanger where it is precooled
by the cold air returning through the
tubes from the chilled mass heat
exchanger. Precooling saves energy by
reducing the heat load on the evaporator.
The precooled compressed air is then
directed into the 2nd stage, air-to-chilled
mass heat exchanger, where its temperature
is lowered to approximately +35°F by
the chilled mass flowing through the
tube side from the 3rd stage, refrigerant-to-chilled
mass, heat exchanger. The dew point
temperature is held within its optimum
performance range by the microprocessor.
The compressed air flows into the moisture
separator where the condensed liquids
are removed by centrifugal action and
sent to the sump for disposal through
the microprocessor controlled drain.
After the liquids have been removed,
the compressed air returns through the
tube side of the 1st stage heat exchanger
where it is reheated by the warm incoming
air.
The chilled mass circulates through
the 3rd stage evaporator shell where
its heat is removed by cold liquid refrigerant
flowing through the tubes from the refrigeration
system. When the Microprocessor reads
the low set point from the thermostats,
it turns the refrigeration compressor
off. When the compressor is off, no
energy is used. When the microprocessor
senses the upper set point it turns
the compressor on.
CYCLING
DISPLAY
Inlet Air Temperature Chilled Media Temperature Ambient Temperature Fahrenheit or Centigrade Alarm Indicator Compressor Running Indicator Service Due Indicator Dew Point (Optional)
낮은 압력강하와 높은
부하에도 원활한 운전성능
