Segment
Data-centre cooling: getting the heat back out
Every watt delivered to a server leaves as heat. For thirty years that heat was removed with air, and for AI racks it cannot be. The move to liquid is the largest change in data-centre design in a generation and it touches the rack, the hall, the plant and the water supply.
In one sentence
Data-centre cooling is the set of systems that transport heat from computing equipment to the outside environment — by moving air, by circulating liquid to cold plates, or by immersing equipment in dielectric fluid.
The physics is unforgiving. Air has low heat capacity, so removing a given amount of heat with air requires moving a large volume of it. Up to roughly thirty to forty kilowatts per rack that is achievable with containment and careful airflow design. Beyond that the airflow required becomes impractical: fans consume a growing share of the energy, noise becomes a safety issue, and the temperature rise across the rack is too large to control.
Liquid solves it because water carries far more heat per unit volume and can be brought directly to the components that produce it. That changes the rack, adds a fluid distribution system, and replaces chillers with dry coolers running much warmer water — which is where the efficiency gain comes from.
How this breaks down
Split by how heat is carried away from the components.
- Cooling plant and componentsChillers, air handlers, cold plates, distribution units, couplings and dry coolers — and why they became a lead-time item.Breaks down into: Cold plates and manifolds · Coolant distribution units · Couplings and hoses · Coolants and fluids · Chillers and air handlers5 pages belowChokepoint
- Air coolingHot and cold aisle containment, economisers, and where the practical density limit sits.Definition page
- Direct-to-chip liquidWater to the processor, a distribution unit in the row, and a warm-water loop to the outside.Definition pageChokepoint
- Immersion coolingSingle-phase and two-phase baths, what they solve, and why adoption has stayed narrow.Definition pageChokepoint
- Heat rejection and waterCooling towers, dry coolers and the water-versus-electricity trade that decides site permits.Definition pageChokepoint
What depends on this
Other pages in this map that name Cooling as something they cannot do without.
Companies across Cooling
Every company named on a step below this page, ordered by how many of those steps it appears at. Compiled from the pages themselves rather than written separately, so the two cannot disagree. Not a ranking and not a recommendation.
- BoydPrivate3 steps
Cold plates and manifolds · Coolant distribution units · Direct-to-chip liquid
- CoolIT SystemsPrivate3 steps
Cold plates and manifolds · Coolant distribution units · Direct-to-chip liquid
- Schneider ElectricFrance3 steps
Coolant distribution units · Air cooling · Direct-to-chip liquid
- Delta ElectronicsTaiwan2 steps
30 more companies appear at a single step each; they are named on the pages for those steps.
How these pages are written
Each page explains one technology in plain language, states what it depends on, and names companies by what they supply at that step. Company roles are described qualitatively and deliberately carry no market shares, revenue figures or rankings — those change faster than an explainer can, and a stale number is worse than none. Ticker links point at company pages on this site and are provided for reference only.
Nothing here is investment advice, a recommendation, or a forecast. A company named on a page about a technology is not thereby a good investment, and the chokepoints described are structural facts about supply chains rather than predictions about prices. Technology moves; where a page describes something as unresolved or in development, that was true when it was written.
Plutux is not an investment adviser. Market data and AI-generated analysis are for information and education only, not investment advice. Disclaimer