CF-11On the silicon
Cold plate
A skived-copper plate sits on every accelerator and CPU. 0.06 °C/W from junction to water, 1.2 bar drop at full flow.
CF-00 / Direct-to-chipRev 26.10
Hall B on the grid · 52 racks live
In 32 °COut 45 °CΔT 13.6 K
Liquid cooling for 120 kW racks
Cold plates.Warm water.No chillers.
We take heat off the silicon at 32 °C, carry it out of the hall at 45 °C, and sell it to the town's district heating grid instead of venting it to the sky.
CF-01 / Thermal fieldHall A
- Supply
- 32.0 °C
- Return
- 45.6 °C
- Flow
- 1,420 L/min
- Load
- 4.8 MW
CF-02 / Loops4 halls
CF-03 / Facility PUE
1.06
Annualised, metered at the utility transformer. Industry median: 1.56.
Heat reused
71%
of all rejected heat, sold to Tinn Energi
Water consumed
0.00L/kWh
closed loop, no evaporative towers
Racks cooled
108
across three halls, two towns
Unplanned downtime
0min
since the first loop was filled
CF-10 / The loop4 stages · 1 boundary
Heat travels one sealed path, from the die to the radiator in somebody's kitchen.
Air never carries the load. Fans in the hall only move the 8 % that the cold plates cannot reach — memory, NICs, power supplies — so the room stays quiet and the floor stays dry.
CF-12In the rack
Rack manifold
Dripless quick-disconnects, one pair per server. A tray comes out in eleven seconds without draining the loop.
CF-13End of row
Coolant distribution unit
N+1 pumps, 25 µm filtration and a leak model that compares supply and return mass every 200 ms.
CF-14Outside the wall
Heat exchange
Plate exchangers hand 45 °C water to the Tinn district grid. Dry coolers on the roof take the summer surplus.
CF-20 / SpecificationSheet CF-SP-26.10
Numbers we put in the contract.
Every figure on this sheet is a service level, not a brochure claim. Miss one for a quarter and the cooling fee for that hall drops by a fifth.
Download CF-SP-26.10 (PDF, 2.4 MB)- Rack density
- 40–160 kWper rack, liquid share ≥ 92 %
- Supply water
- 30–35 °Cno compressor, no chiller plant
- Return water
- 44–48 °Cgrid-grade, sold not vented
- Water use
- 0.00 L/kWhsealed loop, filled once
- Leak response
- < 400 msvalve closure, per manifold
- Retrofit window
- 9 nightstypical 2 MW hall, live
CF-30 / DeploymentsUpdated 02 Oct 2026
Where the loops run.
- RJK-ARjukan, NOTraining cluster, 38 racks4.8 MWLive since Mar 2025
- RJK-BRjukan, NOInference, 52 racks6.2 MWLive since Jan 2026
- NTD-CNotodden, NOResearch HPC, 18 racks2.1 MWBurn-in, week 3 of 6
- LUL-01Luleå, SEColocation retrofit3.4 MWSurvey signed
- NTD-DNotodden, NOReserved7.0 MWQ2 2027
CF-40 / Loop survey
Bring us a floor plan and a power budget.
Two engineers, one day on site, and a written answer within a fortnight: what a warm-water loop costs in your hall, how many nights the retrofit takes, and who in your town would buy the heat.