Cooling

Direct-to-chip cooling and the two loops

Cold plates bolted to each chip carry coolant through micro-channels. Manifolds feed the plates; dripless quick disconnects let a tray be pulled without draining the rack. The technology cooling system (TCS) is the clean loop inside the IT gear. The facility water system (FWS) is the building loop. A CDU sits between them so building water never touches the chips.

Source: https://www.vertiv.com/en-us/insights/articles/educational-articles/understanding-coolant-distribution-units-cdus-for-liquid-cooling/ Checked 2026-09-18