AloomMW50 / Engineering appendix MW50 overview

Aloom MW50 / Engineering appendix / Screening Rev C

The arithmetic
behind the boundary.

This appendix pressure-tests a proposed 50.0 MW facility-input campus boundary. It is screening work—not a detailed design, utility offer, OEM reservation or construction issue.

Declared concept boundary
≤ 50.0 MW facility input
Critical IT
Open
Connection voltage
Open / NSP-selected
Project status
Concept-stage

A01 / Compute reference

A ceiling, not a rack schedule.

The current screening uses NVIDIA GB300 NVL72 and HPE provision references only for conditional rack-side arithmetic inside the 50.0 MW facility-input concept boundary. Final rack count and the complete facility balance remain open pending written OEM configuration and accepted design.

Scenario arithmetic only. Each row conditionally assumes one current rack reference per illustrative C250 accounting allocation. 50 × MW1 = 200 × C250 is an accounting reference—not reserved supply, an accepted rack configuration or a delivered customer system. Bar length shows the stated multiplication and subtraction inside the 50 MW facility-input concept boundary; it is not forecast headroom, spare critical IT, deliverable capacity, a rack schedule, measured demand or accepted allocation.
Conditional one-rack-per-allocation arithmetic. The remainder to the 50 megawatt facility-input concept boundary is not spare critical IT.
Scenario basisConditional one-rack-per-allocation arithmeticRack-side arithmeticArithmetic remainder to 50 MW—not spare ITStatus
NVIDIA published maximum200 × 142 kW28.4 MW21.6 MWScenario only
HPE EDPp upstream-provision scenario200 × 155 kW31.0 MW19.0 MWScenario only
HPE busway-provision scenario200 × 192 kW38.4 MW11.6 MWScenario only

Interpretation The arithmetic remainder to the 50.0 MW facility-input concept boundary must carry fabric, storage, facility systems, electrical and thermal losses, control, house loads and operating margin. It is not forecast headroom, spare critical IT or deliverable capacity. Final rack count remains open.

A02 / Electrical screening

From an open POC to a 33 kV reference campus distribution boundary.

The network service provider selects the point-of-connection voltage and protection basis. The 33 kV A/B arrangement is a study reference only: topology, feeder assignment and operating modes remain open, and no redundancy outcome is declared.

ALOOM-MW50-E-050 / SCREENING REV C / 2026-08-10

Campus electrical screening reference

NOT FOR CONSTRUCTION
MW50 Screening Rev C electrical boundary and allocation reference An open network-service-provider point of connection leads to a declared concept boundary of no more than 50 megawatts continuous facility input, then exactly one 60 megavolt-ampere Rev C reference transformer. A 33 kilovolt A and B campus distribution arrangement is shown as an open topology study, with compute, mechanical and house-load feeder categories all inside the meter cap. Five H10 and 25 B2 blocks are shown separately as accounting allocations, not as a physical feeder schedule. No N minus one, firm-capacity or uptime result is declared. This drawing is not for construction. MW50 Screening Rev C electrical boundary and allocation reference An open network-service-provider point of connection leads to a declared concept boundary of no more than 50 megawatts continuous facility input, then exactly one 60 megavolt-ampere Rev C reference transformer. A 33 kilovolt A and B campus distribution arrangement is shown as an open topology study, with compute, mechanical and house-load feeder categories all inside the meter cap. Five H10 and 25 B2 blocks are shown separately as accounting allocations, not as a physical feeder schedule. No N minus one, firm-capacity or uptime result is declared. This drawing is not for construction.
No “275 kV direct to rectifier” path is proposed. Powerlink’s current indicative guide screens 50–150 MW connections at 110/132 kV, but the selected site may differ and no connection offer exists. Primary references / Powerlink connection process · Powerlink connection guide.
POC apparent power / PF 0.9550 MW / 0.95 = 52.6 MVAFull-cap scenario
Main-plant loading52.6 / 60 = 87.7%Against 1 × 60 MVA nameplate
33 kV line current / PF 0.95I ≈ 921 A50 MW / (√3 × 33 kV × 0.95)
B2 reference / PF 0.952.11 / 3.15 MVA ≈ 67%Before derating and distortion

Arithmetic status Power factor, harmonics, ambient derating, step load, fault duty, selectivity, flicker and the NSP offer govern final equipment. The ratings above are screening inputs only.

Point of connection
Voltage, capacity, fault level and protection remain NSP-selected
Queensland screening
Powerlink currently indicates 110/132 kV for 50–150 MW; site-specific and non-binding
Main transformation
Rev C reference: exactly 1 × 60 MVA, 1+0 common source; OLTC and derating open
Campus distribution
33 kV A/B reference; topology, feeder allocation and operating modes open; no N−1 claim
B2 infrastructure
25 × 2 MW accounting allocations using 3.15 MVA equipment references—not a feeder schedule
Rack interface
Accepted local conversion—not raw transmission voltage

A03 / Thermal screening

The full-load duty is campus-scale.

The steady-state heat balance is fixed by physics. Loop temperatures, capture fraction, rejection technology and parasitic power remain site-specific.

Steady-state facility balance

Q̇reject,ss ≈ 50 MWth

Conditional on reaching the full facility-input boundary, excluding transient storage and separately measured energy export.
Water-equivalent flow

ṁ = Q̇loop / (cp ΔT)

Indicative recirculating-flow arithmetic only—not selected pump flow or water consumption.
ALOOM-MW50-M-050 / SCREENING REV C / 2026-08-10

Campus thermal screening boundary

NOT FOR CONSTRUCTION
MW50 steady-state thermal boundary and water-equivalent flow scenarios Screening Rev C diagram showing a declared facility-input boundary of no more than 50 megawatts. If input reaches that full boundary at steady state, almost all input becomes heat, producing an approximate 50 megawatt total-site thermal rejection consequence, less accepted energy export. This is not a selected liquid-loop or equipment duty. Liquid capture, residual air, loop temperatures, fluid, rejection technology and site limits remain open. Water-equivalent flow values at 10, 15 and 20 kelvin temperature difference are scenarios only; no PUE, critical-IT, redundancy or availability result is declared. MW50 compact steady-state thermal boundary and flow scenarios Compact Screening Rev C diagram showing a facility-input concept boundary of no more than 50 megawatts. If input reaches that full boundary at steady state, the total-site thermal consequence is approximately 50 megawatts, less accepted export; this is not a selected liquid-loop or equipment duty. Heat-capture fractions, fluid conditions, rejection technology and site constraints remain open. Flow values at 10, 15 and 20 kelvin are water-equivalent scenarios only. No PUE, critical-IT, redundancy or availability result is declared.
Functional screening boundary, not a P&ID; no physical MW50 plant has been built or measured. No pump count, pipe size, liquid-capture fraction, loop temperature, rejection technology, water duty or redundancy arrangement is accepted. Flow and PUE rows below remain scenario arithmetic only.
Illustrative water-equivalent flow scenarios at the 50 MW thermal screening case. Scenario arithmetic only—not selected fluid, pump duty, pipe sizing, water use or measured plant capacity.
Loop ΔTMass flowWater-equivalent volume flowStatus
10 K ≈ 1,196 kg/s ≈ 4,306 m³/h Scenario only
15 K ≈ 797 kg/s ≈ 2,871 m³/h Scenario only
20 K ≈ 598 kg/s ≈ 2,153 m³/h Scenario only
Division scenarios only. Under the ≤50.0 MW facility-input concept cap, 50.0 divided by each illustrative PUE input gives the displayed conditional arithmetic IT ceiling. The PUE inputs are not targets or measurements, and the outputs are not accepted, reserved, available or deliverable critical-IT capacity. Actual facility input, PUE boundary, IT rating, parasitics and operating conditions remain open; no MW50 plant has been built or measured.
MW50 illustrative PUE division sensitivity. Four unmeasured PUE scenario inputs are divided into the 50.0 MW facility-input concept cap. The results are conditional arithmetic ceilings, not targets, measurements or accepted critical-IT capacity.
Illustrative PUE divisorFacility-input concept capConditional arithmetic IT ceilingStatus
1.1050.0 MW45.45 MWScenario only
1.1550.0 MW43.48 MWScenario only
1.2050.0 MW41.67 MWScenario only
1.2550.0 MW40.00 MWScenario only

No PUE claim These are division scenarios, not a target, measurement or guarantee. MW50 has no accepted critical-IT rating.

Open duty Design ambient, approach temperature, capture fraction, residual air, fluid chemistry, water, acoustics, plume, redundancy, parasitic power and ride-through remain open.

A04 / Failure domains

No uptime claim before consequence analysis.

Reference grouping creates study boundaries. It does not create resilience automatically. Each shared system needs a declared loss case, operating response and test.

Failure-domain screening only. These rows are reference groupings and open questions—not a selected physical topology, accepted failure analysis or loss case, N+1 design, firm-capacity statement, surviving-output or resilience result, or uptime/SLA claim. A declared loss case, operating response, test and accepted consequence are required.
MW50 failure-domain screening register — Screening Rev C; reference/scenario only, not for construction; consequences remain open.
DomainScreening postureRequired closureStatus
NSP supply / POCOne commercial-boundary scenarioFirm capacity, outage exposure and any alternate-supply basis require accepted studies and contract terms.Open
Campus HVA/B bus scenarioTransfer, protection and maintenance claims require accepted studies.Open
H10 allocation reference5 × 10 MW facility-input accounting allocationsThis is not a physical feeder schedule; fault containment and surviving useful output remain open.Accounting reference / open
B2 allocation reference25 × 2 MW facility-input accounting allocationsThe 3.15 MVA equipment reference does not create deliverable campus capacity; workload recovery remains open.Accounting reference / open
Shared thermal plantN+1 study input · not a designModule, pump, control and ride-through requirements follow the accepted duty.Open
Data + controlLogical-isolation study posture · not a current implementationQuorum, durable copies, ingress diversity and recovery objectives require service design.Open

Next / Project development

Replace scenarios
with accepted inputs.

A real site study starts with the grid position, site constraints, workload and availability consequence—not a preselected rack count.

Start an MW50 project