The highest density per rack heat loads should be cooled with which cooling architecture?

Question

Options

• ARow
• BRack
• CRoom
• DBuilding

• A
  8% (3)
• B
  72% (26)
• C
  3% (1)
• D
  17% (6)

Explanation

Rack cooling (option B) places the cooling solution directly at or within the rack itself, making it the only architecture capable of handling extreme heat densities - often exceeding 20kW per rack - by removing heat at its source rather than relying on the surrounding air. Room cooling (option C) uses CRAC/CRAH units to cool the entire data center floor, which is far too diffuse for localized high-density loads and struggles to prevent hot spots. Row cooling (option A) is more targeted, placing cooling units between rows of racks, but still serves groups of racks rather than individual high-density ones, limiting its effectiveness at the extremes. Building cooling (option D) operates at the facility infrastructure level - chillers, cooling towers - and manages aggregate thermal load, not per-rack density. Memory tip: think "closer to the heat, higher the density" - as rack heat loads increase, the cooling architecture must move closer in scale from building to room to row to rack.

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