The Definitive Guide toAI Data Centers
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TCS · Technology Cooling System

The secondary liquid loop that carries heat from IT equipment to the CDU; the facility loop rejects that heat onward to the outside world.

Current numbers

~3–5 °CCDU heat-exchanger approach (FWS→TCS) as a design allowance; the OCP Project Deschutes 1.0.0 spec targets 3 °C at 2 MWas of 2026-10 · register ↗
~25–50 µmFull-flow TCS filtration (follow the rack OEM's requirement); side-stream polishing can be sub-micron, 0.2 µm on Deschutes-design unitsas of 2026-09 · register ↗
~7.5–12 °C (typical 10 °C)OCP's TCS guideline for cold-plate coolant rise, ~1.25–2.0 L/min per kW of PG25; your rack's flow curve sets the valueas of 2023-03 · register ↗

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