Closed-Loop Cooling Explained: The Plumbing Behind Meta’s AI
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Powerful AI servers generate so much heat that traditional air cooling is no longer sufficient.
Meta instead uses a closed cooling system where a mixture of water and glycol circulates through the servers' hardware, releases heat through heat exchangers, and is reused in a loop — the same fluid can be used for up to a decade. This system uses much less water than one might think (less than a couple of restaurants per year), takes up less physical space than air cooling, and Meta shares this technology openly with the industry through its Open Compute Project.
One of the consequences of the AI boom is that cooling servers has become a serious engineering challenge.
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Vibekollen prepared this summary with AI from the original publication. The content belongs to Meta.
