Why Rack Cooling Is Important For The Modern Data Business User

Businesses have an extensive reliance on servers which in turn rely extensively on

the data centres ability to keep them at a sustained ambient temperature. Rack cooling is one of the primary concerns of modern data centre designers and server technicians the constant fight to keep potentially very high temperature appliances running within their safe operating parameters.

Part of the problem is the sheer volume of servers needed to run the data requirements of even a small to medium sized business. One server on its own with plenty of air around it should self-regulate but modern businesses put dozens of servers together in server racks.

For reasons of space and security, the server rack is ideal. But as far as temperature control is concerned it cannot be considered as ideal. So the rack cooling must be designed along with the centre to keep things running smoothly and predictably.

Servers expel hot air as exhaust from vents and fan sites. The hot air is created mainly by processors running at the intergalactic speeds necessary to keep todays data demands in order. The hot air is blown away from the processor by the servers internal fans and leached out of the exhaust panels in the side and at the back of the unit.

So rack cooling first has to allow the hot air expelled by the server to be sucked properly away from it. A lot of the problems in data centre cooling occur when multiple servers expel exhaust air which builds up into an effective warm front raising the temperature of the room unpredictably and causing fans and cooling systems to spin out of control.

Cold aisle containment is one of the more efficient methods of rack cooling working, as it does, by separating the hot air coming out of the server from the cold air used to keep it at the right temperature. While other methods of cooling result in mixtures of warm and cold air (which cause unpredictable spikes of hot air), the cold aisle containment system is even and predictable.

In short, the cold aisle containment method works as follows.

Cold air is passed over the front of the servers from a chilled artificial floor installed above a refrigeration unit. This cold air is then sucked through the servers by the fans, which expel it (once its been through all the hot bits inside it as warm air. The warm air is expelled out the back of the server.

The back end of the server is separated from the front by containing the aisle hence the name cold aisle containment.

In this method of rack cooling, outside the contained cold aisle all the warm air rises and then circles down towards a refrigeration unit which sucks the air through and back under the chilled floor. So the whole system perpetuates itself and ensures totally regulated temperatures around the servers at all times.

Since one of the main problems with rack cooling has always been an inability to predict fluctuations in ambient temperature, cold aisle containment is frequently recommended.

by: keyzone computer

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