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Glossary/Index

acre-foot

A unit of volume used to measure water; the amount of water needed to cover one acre of land (43560 square feet) to a depth of one foot. One acre-foot is equivalent to about 1,233 m³.

air cooling

A data center cooling method that uses exclusively air conditioning systems to circulate cool air over hardware to dissipate heat.

chiller

A machine that removes heat from a liquid coolant through vapor-compression, adsorption refrigeration, or absorption refrigeration cycles.

colocation center

Sometimes shortened to colo, a type of data center that rents out equipment, space, and bandwidth to retail customers, as opposed to single-tenant hyperscale data centers.

cooling tower
CRAH
evaporative cooling
facility power
free cooling
hyperscale data center
immersion cooling
IT equipment power
kWh
liquid cooling
PUE
subsidence
WUE