Filter
Top Products
2-STAGE INDUSTRIAL EVAPORATIVE COOLING
Indirect/Direct Evaporative Cooling Process
In the indirect cooling stage, entering air is cooled along a horizontal
humidity ratio line on the Psychrometric Chart (A to B) without adding
moisture. In the next cooling stage, this air is further cooled along a new
wet-bulb line (B
to C), resulting in
a lower dry-bulb
temperature of
leaving air than
can be achieved
with single stage
direct evaporative
cooling alone.
Typical Confi gurations
Many confi gurations of 2-Stage Industrial MasterCool are possible.
Typical fi eld-assembled components include 2 or 3 Indirect Cooling
Modules with Models MD/MS524 and 4 or 6 ICM’s with models MD/MS/
MU628 Contact your
local MasterCool
representative for
assistance in sizing.
Models shown with
three ICM’s at each
inlet location.
The Indirect Cooling Module
Outside air is drawn into the ICM. A fan
draws air through the inside of vertical fi ns
(which have water running inside them). The
air picks up heat and is expelled from the
ICM while the fi ns are cooled by evaporation.
Other outside air is drawn across the outside
surfaces of the cooled fi ns, and is cooled
without coming in contact with water. This
cooled air, with no humidity added, then
enters the direct evaporative section of the
Industrial MasterCool for fi nal cooling.
2-Stage Indirect/Direct
Evaporative Cooling
2-Stage cooling allows you to use energy-saving
evaporative cooling technology for design conditions
where direct evaporative cooling alone is not adequate.
A 2-stage cooler results in greater cooling power, less
affected by higher ambient temperature and humidity.
In the indirect cooling stage, outside entering air
is cooled sensibly reducing its total enthalpy. This
“precooled” air is then evaporatively cooled in the direct
cooling stage, approaching its new, lower
wet-bulb temperature.
The end result is discharge temperatures near or
even slightly below the wet-bulb temperature.
More importantly, these lower discharge temperatures
translate into customer comfort at a fraction of the cost
of refrigerated air conditioning.
Applications
With its substantial increase in cooling capacity, the
indirect/direct 2-stage Industrial MasterCool can replace
mechanical refrigeration in many applications.
KoolKalk...
Computer Aided Sizing
The sizing method described in this brochure can be used
for general sizing of direct evaporative Industrial MasterCool
units.
For more accurate sizing, and for sizing indirect/direct units,
we recommend the use of KoolKalk... an IBM compatible
computer program designed specifi cally for AdobeAir
Evaporative Coolers. For more information please visit the
AdobeAir, Inc. website at www.AdobeAir.com.