Data Centres

Entropic create cost effective engineered solutions for Data Centre projects where time is at a premium.

Entropic provide ventilation and air conditioning equipment for hyper-scale and collocation data centres throughout Europe.

Entropic large format dampers are particularly suited for hyper-scale data centres which require large air flows.
With each damper module size available up to 2.4m x 2.4m with a single motor, it is probably the most cost effective solution on the market.
The combination of a very large damper module and a single motor optimise installation time, wiring, commissioning and maintenance.

Design considerations:

  • Large airflow (20m3/s through a 2.4m x 2.4m damper module with a pressure drop of just 4Pa)
  • Low pressure drop
  • Corrosion resistance for costal locations (stainless steel)
  • Condensation risk on internal surfaces of dampers (conductivity of materials used)
  • Risk of ice forming on internal surface of closed dampers
  • Air tightness (complete shut-off)
  • Reliability
  • Low maintenance costs

Volume and pressure drop

Panel filters
•Cheap
•Effective
•Widely available
•Pressure drop 50Pa

Electrostatic filters
•Removes pollen, bacteria and dust
•Reliable and simple
•Very low energy use
•Extremely low maintenance costs, it never needs replacing
•It can be washed and sanitised using ordinary detergents, without any decline in efficiency or product life
•No ongoing costs, no replacement filters required
•Integrated ‘Change filter’ alarm
•Pressure drop 10Pa
•1000kW = 86m3/s

AHU Design for Crac Systems

With CRAC units in the space, the fresh air needs to be conditioned.

Reliable, energy efficient and low environmental impact systems

Free cooling

Ambient Air is used to directly cool the data hall. Return Air is drawn from the Hot Aisle with a fan wall. Desired supply air temperature is controlled with a mixing box between the ambient and return air. Mix air is filtered and supplied to the Data Hall with a fan wall. Non-recirculated air is dumped
If additional cooling is required this can be a adiabatic cooler, DX or CHW coil.

Advantages
No Additional cooling is required provided the ambient air is lower than the cold aisle (Eg27C cold aisle in Ireland). So no water usage or water treatment is required.
No additional fresh air for pressurisation / ventilation.

Considerations
Ambient air needs to be of suitable quality for supply to the Data Hall egmaritime climate or very polluted city or industrial area
Supply and return fan wall will run the same airflow in parallel which may (depending on
Architecturally challenging.

Free cooling

Indirect air cooled –plate heat exchanger method
Full recirculation air handling unit(s) with an air to air plate heat exchanger. Cooling is achieved by passing fresh air over the plate in a cross flow pattern to dump.

Advantages
Least expensive of air side heat recovery
Only one circulation fan on room side

Considerations
Connections are difficult requiring cross over of flows and returns
Will need additional cooling from approx20C
HX will need to come in short sections to come out from the side of the unit

Free cooling

Double plate heat exchanger.
Full recirculation air handling units with 2no air to air plate heat exchangers in series. Cooling is achieved by passing fresh air over the 2no plate HXs in a cross flow pattern to dump.

Advantages
More efficient heat exchange than a single HX
Lower hours of supplementary cooling required
Supply & return connections on same side

Considerations
Higher cost than a single exchanger
Higher pressure drop than a single HX unit
HXs will need to come in short sections to come out from the side of the unit
Will need additional cooling from approx23C
Only one circulation fan on room side

Free cooling

Vertical Rotary Wheel Heat Exchanger
Series of full recirculation air handling units with a rotary heat recovery wheel mountedin the AHU. Cooling is achieved by passing fresh air through the rotating wheel cooling the recirculated air as passes to dump
Full recirculation air handling units with 2no air to air plate heat exchangers in series. Cooling is achieved by passing fresh air over the 2no plate HXs in a cross flow pattern to dump.

Advantages
More efficient heat exchange than a single HX
Lower hours of supplementary cooling required
Supply & return connections on same side

Considerations
Higher cost than a single exchanger
Higher pressure drop than a single HX unit
HXs will need to come in short sections to come out from the side of the unit
Will need additional cooling from approx23C
Only one circulation fan on room side

We realise Data Centre projects require speedy solutions and revisions to bring the design to a close. If you have any queries regarding Data Centre environmental design, Entropic can assist you in achieving a cost effective engineered solution.

Case Studies