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
to C), resulting in a lower
temperature of leaving air than can be achieved
with single stage direct evaporative
cooling alone.
Typical Configurations
Many configurations of
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 fins (which have water running inside them). The air picks up heat and is expelled from the ICM while the fins are cooled by evaporation. Other outside air is drawn across the outside surfaces of the cooled fins, 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 final cooling.
2-Stage Indirect/Direct
Evaporative Cooling
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
The end result is discharge temperatures near or even slightly below the
More importantly, these lower discharge temperatures translate into customer comfort at a fraction of the cost of refrigerated air conditioning.
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 specifically for AdobeAir Evaporative Coolers. For more information please visit the AdobeAir, Inc. website at www.AdobeAir.com.
With its substantial increase in cooling capacity, the indirect/direct