Walkthrough

How much AI compute can DH-02 carry?

Capacity and density envelope · target platform NVIDIA GB300 NVL72 · 5 architectures compared

13 constraints across electrical, thermal and physical domains, solved over one model of this hall. The envelope is the minimum; the binding constraint is the one that produced it.

Every figure here comes from the same solved model as the written study, where each carries its evidence class and range. This deck shows them rounded and without the labels, so read it as modelled, not measured.

The answer

Rack feed / tap-off rating

platform needs 205 [174–236] A (E0) per rack; installed tap-offs rated 63 A (E5).

Deployable today

racks, as the hall stands

After the ladder

racks · Full DLC plus behind-the-meter supply

Time to full capacity

160

weeks (range 80–210) · set by transformer capacity

Reference Project (synthetic) · prepared 2026-09-14 · modelled, not measured

What stops it

The headroom ladder

Each row is what binds next, what moves it, and what that costs. Showing the first 8 of the 20 rungs taken; the full ladder is in the written study (section 2) and the final answer, 62 racks, is reached only after all of them.

#	Constraint	Racks	Relief	Capex	Lead time
1	Rack feed / tap-off rating	0 → 0	Higher-rated tap-off units (and busway if ampacity does not a… (no racks on its own: tied constraint)	372,000 [186,000–744,000] EUR	24 [12–40] weeks
2	Residual air load removal per rack	0 → 0	Add in-row cooling or rear-door heat exchangers for the resid… (no racks on its own: tied constraint)	558,000 [279,000–1,120,000] EUR	20 [12–32] weeks
3	Achievable facility water temperature	0 → 8	Adiabatic assist plus trim chiller on the high-temperature loop	350,000 [175,000–700,000] EUR	32 [20–48] weeks
4	Transformer capacity	8 → 8	Replace / add transformer capacity (uprate ~60%) (no racks on its own: tied constraint)	1,200,000 [600,000–2,400,000] EUR	160 [80–210] weeks
5	UPS capacity (protected load)	8 → 12	Add UPS modules / new UPS block	768,000 [384,000–1,540,000] EUR	30 [20–52] weeks
6	Busway ampacity	12 → 22	Replace busway with 800-1000 A and new tap-off units	450,000 [225,000–900,000] EUR	36 [24–52] weeks
7	CDU capacity (derated to site water temperature)	22 → 25	Add CDU capacity (one further unit per bank)	180,000 [90,000–360,000] EUR	26 [16–40] weeks
8	UPS capacity (protected load)	25 → 28	Add UPS modules / new UPS block	768,000 [384,000–1,540,000] EUR	30 [20–52] weeks

Reference Project (synthetic) · prepared 2026-09-14 · modelled, not measured

When

Time to power

Reliefs run in parallel, so the racks unlocked by the first N steps arrive at the longest lead time among them. One item sets the date: transformer capacity.

Capacity arrives in steps, not continuously — each step is a constraint relieved.

Architecture

The same connection, more compute

Every kilowatt the cooling architecture consumes is a kilowatt of contracted capacity that cannot be sold as compute.

Reference Project (synthetic) · prepared 2026-09-14 · modelled, not measured

Cost

What it takes, and how well we know it

8 of 8 priced lines are library placeholders rather than quotations. That is why the accuracy class reads as it does — it follows the weakest line, not the average.

Indicative capex (lower bound)

≥ 18,800,000 EUR

a cost it needs has no price

Per kW of IT

2,250 EUR/kW

Accuracy class

Class 5 (order of magnitude)

-50% / +100%

Excludes IT hardware, migration and lost tenancy revenue.

Evidence

What nobody has measured yet

Intake is 83% complete. Each of these moves the answer and is currently a library default.

Input	Assumed	Where it comes from
Installed CDU schedule	[]	CDU nameplates and the mechanical single-line diagram.
TCS target supply temperature	30 [27–32] degC (E0)	The platform vendor's reference design for the target rack.
Rear-door heat exchanger capacity per rack	60 [20–80] kW (E0)	The selected rear-door unit's datasheet at the site's water temperature and airflow.
All-in grid electricity price	library placeholder of 140 EUR/MWh (E0)	The supply contract, or 12 months of invoices divided by metered energy.
Discount rate	none: the lifecycle value is undiscounted	The client's hurdle rate.

Reference Project (synthetic) · prepared 2026-09-14 · modelled, not measured

Recommendation

Full DLC plus behind-the-meter supply

The same hall with on-site firm supply where the grid connection binds. The only scenario whose capacity is set by what can be built rather than by the queue.

Get the DSO position in writing on firm capacity and any flexibility product. It costs nothing but time and it can end the question.
Commission a structural assessment of the floor and a hydraulic model of the secondary loop. Both are cheap relative to the decision and both can invalidate it.
Place long-lead orders only after those clear — lead time, not construction, governs the programme.
Instrument the hall and reconcile this model against twelve months of measured data before phase two. That is what moves these numbers from estimated to field-validated.

Reference Project (synthetic) · prepared 2026-09-14 · modelled, not measured

Boundary

What this is, and what it is not

An engineering opinion supported by a documented model. Not a design package, and it confers no design liability.
No stamped drawings, no CFD of this hall, no equipment selection or bill of materials.
The floor-loading check is a screening calculation; a structural engineer must sign it off.
We quote no equipment and take no margin on hardware. Nothing here routes you to a supplier we are paid by.

Nothing in this deck is a measurement of this asset unless it is labelled E5 or above.