INNOVATIVE AIR CONDITIONING    
  Data Hall Free Cooling Product Range  
Free Cooling
Mode of Operation:
-  Air is discharged in the normal fashion into the raised floor
-  Hot air is returned via the return air damper in the plenum
-  Fresh Air is drawn in by the CCU fans or assisted using duct mounted remote fans to the plenum
-  The air streams are mixed within the plenum
-  When free cooling is available, the dampers modulate
-  The space pressurised; excess dumps via the overpressure damper
-  When no fresh air cooling is available, the fresh air damper closes
-  The EDPAC controller manages the Fresh Air by monitoring the outdoor temperature and mixing it with the return air
-  The discharge air temperature is limited into the room
Operational Savings:
-  Full Fresh air cooling is available when the outdoor temperature is 8 to 10oC lower than the room return air temperature
-  The room operating temperature determines when free cooling is available
-  With a room operating at, say 35oC, full fresh air free cooling is available in many places for as much as 80% of the time
-  Additional operational savings are available with the EDPAC range of VSD compressor systems
-  All systems utilise EC backward curved fans, which modulate for part load management

Download:
EDPAC HCAFA Fresh Air Free Cooling Oct 10
Adiabatic Free Cooling
Operating Conditions:
Data Hall:
   Supply Air 30 - 39C
   Return Air 18 - 27C

Fresh Air:
   Up to 35C Dry Bulb
   Up to 23C Wet Bulb

Features:
-  Simple Operation
-  Sensible Cooling Management
-  Minimum Use of Water
-  High Efficiency Thermal Wheel
-  EC Hot-swap fans on both air streams
-  Built in redundancy
-  Unique Fresh Air Bypass system
-  Capacities from 40 to 400kW
-  Standard Components
-  Compatible with all BMS Systems
-  Auto-changeover
-  Built-in smart controls for part load management between multiple systems
-  Fresh Air management with pressurisation and Humidity Management, if required

Download:
EDPAC HCA2A Air to Air Free Cooling Oct 10
Fluid Free Cooling
  Full Control Panel Options available:
-  VSD's
-   EC Fans

EMC Free Cooling Project
 
Availability of Fresh Air Cooling

Chart reproduced from the Green Grid
The room operating temperature determines the level of free cooling available at specific outdoor conditions.
Fresh Air Free Cooling:
- Full Fresh air cooling is available when the dry bulb outdoor temperature is 8 to 10oC lower than the room return air temperature.
- With a room maximum operating temperature of, say 35oC, full fresh air free cooling is available in many places for as much as 80% of the time.
- Partial Fresh Air cooling is also available at lower differential temperatures, depending on how the indoor units are managed.
- Additional operational savings are available with the EDPAC range of VSD compressor systems, which can be set up to match the load.

Enthalpy assisted Fresh Air Free Cooling:
- For Enthalpy based systems, free cooling is available at conditions driven by the wet bulb.
- With a room maximum operating temperature of, say 35oC, enthalpy based free cooling should be available for 100% of the time - depending on the local maximum wet bulb conditions.
- For the chart shown, the wet bulb condition would be 19oC, offering the potential to cool at some 7 degrees lower than the dry bulb temperature.
  EDPAC provides a full range of:
- Fresh Air Free cooling options for indoor Chilled Water or Direct Expansion systems
- Enthalpy assisted Fresh Air to air Free Cooling systems
- EC Fan assisted Fresh Air systems with controls integrated to the indoor units
- Pressurisation and humidity control systems
 
         
     
             
        EDPAC International
Contact us at: Ireland -  England -  Asia Pacific