MDCX Reference Design
200 Immersion Cooling Container (I200C20)
I200C20ST50
20ft 200 kW Immersion Cooling · 4× A32 tanks · up to 50 kW/tank · no UPS
Overview
What this SKU is: envelope, installed units, density, and the geometry you can download. Figures here are properties of the product, not of any one site.
| Item | Value | Basis |
|---|---|---|
| IT design load | 200 kW | claim C34 |
| Installed units | 4 | claim C35 |
| Maximum density | 50 kW/tank | claim C13 |
| Air-cooled rack load | 5 kW | table MDCX immersion container specification |
| GPU capacity | 256 | table MDCX immersion container specification |
| Envelope | 6,058 × 2,438 × 3,490 mm | table ISO container envelope, MDCX module geometry |
| Footprint | 14.8 m² | derived 6.058 m × 2.438 m |
| Lead time | 90 days ex-works | claim C3 |
3D views
Orthographic and section views are generated from the published module geometry for this SKU. The interactive view is read-only — this is the standard configuration, not a configurator.
Geometry and schedules
No OpenUSD model is published for this SKU yet.
System boundary
The MDCX-supplied envelope is the container. Primary (utility) and secondary (facility) electrical sides meet at the transformer. Site responsibility begins at the published electrical and water interfaces.
Interface definition only. Implementation details are not published.
Power distribution
How power is broken down and distributed inside the boundary, and what the site must present at the connection point.
IT load against plant overhead
At: USA - Pennsylvania (PJM), 34 °C, Summer peak, 100% utilization. The racks draw below the density ceiling at this GPU — 15 kW of rack headroom remains.
Plant consumers
| Consumer | Power | Share of facility |
|---|---|---|
| IT — immersion tanks | 180 kW | 76.7% |
| IT — air-cooled rack | 5.0 kW | 2.1% |
| Tank CDU pumps | 6.8 kW | 2.9% |
| Dry cooler fans | 6.2 kW | 2.6% |
| Hybrid chiller | 30.5 kW | 13.0% |
| Distribution loss | 1.9 kW | 0.8% |
| Facility auxiliaries | 4.3 kW | 1.8% |
| Facility total | 235 kW | 100% |
Plant overhead is 49.7 kW, 26.8% of IT, for a PUE of 1.268 at this point.
Single-line topology
Single-line topology (interface definition). Protection settings are not published.
No UPS in this SKU — UPS and battery are customer-supplied, outside the container boundary.
Ratings at the boundary
Ratings in this section are derived from the IT design load and the published PUE band. They size an interface; they are not measured results and are not claims-registry facts. Each derived row prints its formula.
C12 immersion PUE ≈ 1.05 is peak dry-bulb ≤ 24 °C / free-cooling only. Hot-zone PUE is not 1.05.
| Item | Value | Basis |
|---|---|---|
| IT design load | 200 kW | claim C34 |
| Facility load | 224–280.5 kW | derived 200 kW × PUE 1.120–1.402 |
| Connection capacity | 246.4–308.6 kW | derived facility load × 1.10 |
| Transformer capacity | 246.4–308.6 kW | derived sized to connection capacity |
Load schedule
A per-circuit load schedule is not published for this SKU. The topology above is the interface definition.
Interface definition only. Implementation details are not published.
Cooling distribution
How heat leaves the racks and reaches ambient: the loops, their design temperatures and flows, and where the plant switches from free cooling to mechanical cooling.
Heat distribution
At: USA - Pennsylvania (PJM), 34 °C, Summer peak, 100% utilization. The racks draw below the density ceiling at this GPU — 15 kW of rack headroom remains.
| Heat path | Heat | Share of IT |
|---|---|---|
| Dielectric coolant — direct immersion | 180 kW | 97.3% |
| Air — auxiliary rack | 5.0 kW | 2.7% |
| IT heat total | 185 kW | 100% |
97.3% of the heat leaves directly into the dielectric coolant; 2.7% is air from the auxiliary rack. There is no room-air cooling path to size.
Loop schematic
Loops
| Loop | Supply | Return | ΔT | Design flow | Fluid |
|---|---|---|---|---|---|
| Tank oil loop — direct immersion | 35 °C | 43 °C | 8 K | 250 L/min | Single-phase dielectric coolant |
| Primary loop — CDU to heat rejection | 32 °C | 37 °C | 5 K | 125 L/min per CDU | 25% glycol |
Heat rejection
Free cooling below the switch temperature; hybrid chiller above it
| Item | Value | Basis |
|---|---|---|
| CDU rated cooling | 400 kW | table MDCX immersion tank specification |
| CDU units installed | 8 | table MDCX immersion tank specification |
| In-row CRAH installed | TBD | TBD |
| In-row CRAH rated cooling | TBD | TBD |
| In-row CRAH fan power | TBD | TBD |
| CDU secondary flow | 1,000 L/min | table MDCX immersion tank specification |
| CDU approach | TBD | TBD |
| Pressure drop | 35–45 kPa | table MDCX immersion tank specification |
| Pipe diameter | DN50 | table MDCX immersion tank specification |
| Switch temperature | 24 °C | table MDCX heat-rejection selection rule |
Interface definition only. Implementation details are not published.
Performance
PUE, WUE, and annual energy depend on site and workload, so they are not properties of the SKU. Solve this SKU at your own site:
Basis and disclaimer
Computed numbers in this document are operating-point results for the stated city, season, workload, and utilization. They are not guarantees or SLAs. Marketed numbers live in the claims registry.
Cited claims: C3 · C4 · C31 · C36 · C37 · C38 · C39 · C12 · C13 · C34 · C35.
C12 immersion PUE ≈ 1.05 is peak dry-bulb ≤ 24 °C / free-cooling only. Hot-zone PUE is not 1.05.
Expansion block and first delivery are 90 days ex-works from receipt of down payment (C3, C4); on-site installation and commissioning 3–4 weeks (C36). Freight and customs are buyer-arranged; MDCX publishes no estimate (C39). Retired schedule and fleet-PUE claims are not restated.
Reserved items
This document publishes what a correct result looks like. It does not publish how MDCX produces it, or with what.
| Withheld | Statement |
|---|---|
| BOM, makes, models, suppliers | Bill of materials, makes, models, and suppliers are not published. |
| Control logic, alarm thresholds, tuning | Control logic, alarm thresholds, and tuning policy are not published. |
| Solver kernel | The solver kernel is not published. Operating conditions and result numbers are. |
| Manufacturing and quality path, takt | Manufacturing path, quality process, and line takt are not published. |
| Price and commercial terms | Price and commercial terms are not published. |