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The goal of close coupled cooling is to bring heat transfer closest to its source: the equipment rack. By moving the air conditioner closer to the equipment rack a more precise delivery of inlet air and a more immediate capture of exhaust air is ensured. The proximity of the cooling system with the server cabinet allows a high-performance solution
Raised or false floor cooling in server rooms can serve a similar purpose; they permit cooling airflow to equipment through the underfloor space to the underside of enclosed rack cabinets. [22] A difficulty with forced air fan cooling in rack equipment is that fans can fail due to age or dust. The fans themselves can be difficult to replace.
Also power and cooling is redundant: the chassis supports up to six power-supplies and nine fan units. All power supplies and fan-units are inserted from the back and are all hot-swappable. [2] The power supplies are located at the bottom of the enclosure while the fan-units are located next to and in between the switch or I/O modules.
The choice of racks in a server room is usually the prime factor when determining space. Many organisations use telco racks or enclosed cabinets to make the most of the space they have. Today, with servers that are one-rack-unit (1U) high and new blade servers, a single 19- or 23-inch rack can accommodate anywhere from 42 to hundreds of servers.
Rack cabinet is a typical enclosure for horizontally mounted servers. Air typically drawn in at the front of the rack and exhausted at the rear. Each cabinet can have additional cooling options; for example, they can have a Close Coupled Cooling attachable module or integrated with cabinet elements (like cooling doors in iDataPlex server rack).
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