Concept-stage sizing. Every figure here is deterministic and hand-checkable. Hotspots, hot-air reingestion and rack-level airflow require CFD analysis.
PUE and WUE are estimates from the chosen strategy and climate. Enter the client's measured or target values to make every figure exact.
Cost & carbon your inputs
€/kWh
€/m³
g/kWh
Set your actual tariff and grid factor. Typical grid intensity (approx, varies yearly): Sweden ~30 · France ~60 · Ireland ~300 · Germany ~350 · Singapore ~400 gCO₂/kWh.
Annual energy cost
–
= annual energy × price
Annual water cost
–
= annual water × price
Total utility cost
–
= energy + water cost
Carbon emissions
– tCO₂/yr
= annual energy × grid intensity
Assumptions & secondary heat gains — edit these
%
%
W/m²
kW
Plant inputs
°C
kW
kW
kVA
h
min
%
Heat rejection
Rejection duty
– kW
= cooling load × (1 + 1/COP)
Chillers
–
⌈ load ÷ chiller cap ⌉ + spare
Dry coolers
–
⌈ rejection ÷ unit cap ⌉ + spare
Chilled-water flow
– L/s
= load ÷ (cp,water · ΔT)
Backup power
Facility load carried
– kW
= IT × PUE (Hall tab)
Generators
–
⌈ facility ÷ (0.8·genset kVA) ⌉ + spare
UPS (critical / IT)
– kW
–
= IT load, battery to genset start
Fuel storage
– L
= facility × autonomy × 0.25 L/kWh
Waste-heat recovery
Recoverable heat
– kW
= rejection duty × capture %
Homes heated (≈)
–
annual heat ÷ 12 MWh/home · needs offtaker
Concept plant sizing. Assumes power factor 0.8 and genset consumption 0.25 L/kWh. Facility load follows PUE (estimate unless client-set). Detailed selection, part-load and acoustics need vendor data.
Refs · rejection = evaporator load + compressor work · water flow Q = ṁ·cp·ΔT (cp,water = 4.187 kJ/kg·K)