PUE Calculator

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⚡ PUE Calculator

Power Usage Effectiveness — measure data center energy efficiency

Project Information

Data Source:

    PUE Calculation

    Weather
    Chiller Data
    Cooling Tower Data
    Free Cooling
    IT Power & Loading
    Equipment List
    Electrical Loss
    Compute
    Equipment Category Qty Power/Unit Total (kW) UPS Backed IT Related
    No equipment added yet. Use the form above to add items.
    IT Equipment
    0.00 kW
    IT-Related Overhead
    0.00 kW
    Non-IT Overhead
    0.00 kW
    Total Facility
    0.00 kW

    Data Hall IT Power

    IT Power / Hall (MW)
    Qty
    UPS Backed
    Data Hall Qty IT Power / Hall (MW) Total IT Power (MW) UPS
    No data halls added yet.

    Daily Loading Trend

    Enter IT load as % of rated capacity for each hour. Default 100%.

    Average Load
    —
    Peak Load
    —
    Base Load
    —
    Avg IT Power
    —
    Geocoding location…
    📍

    ERA5 reanalysis, 20-year peak per hour slot (8 760 hrs) · Wet bulb via Stull (2011) · Aligned with ASHRAE TMY methodology

    Cooling DB 1%
    —
    Cooling WB 1%
    —
    Cooling DB 2%
    —
    Heating DB 99.6%
    —
    Annual Avg DB
    —
    Annual Avg WB
    —

    N=20 Year Extreme Design Conditions (peak of 20-year dataset)

    N=20 Peak DB
    —
    N=20 Peak WB
    —
    N=20 Min DB
    —
    Free Cooling Potential (Annual)
    Air-side Economizer — outdoor DB < °C
    —
    Evaporative / Indirect — outdoor WB < °C
    —

    Duration curve: hours ranked hottest → coldest. DB = dry bulb · WB = wet bulb.

    Model / Name
    Qty
    Capacity (kW)
    Rated COP
    Load (%)
    UPS Backed
    IT Related
    Model Type Qty Capacity (kW) COP Load (%) Power (kW) UPS IT Related COP Table Range / Config
    No chillers added yet.
    Total Chillers
    0
    Total Capacity
    0.00 kW
    Total Power
    0.00 kW

    Model / Name
    Qty
    Cells / Unit
    Fan kW / Cell
    Pump kW / Unit
    UPS Backed
    IT Related
    Model Qty Cells/Unit Fan kW/Cell Pump kW/Unit Total (kW) UPS IT Related Performance
    No cooling towers added yet.
    Total Units
    0
    Total Cells
    0
    Total Power
    0.00 kW

    Free Cooling

    Pair each chiller with a free cooling mode and a cooling tower.

    # Chiller Free Cooling Mode Paired CT CHWS (°C) HX Appr. (°C) Max CW Out (°C) Min T/D (%) CW Strategy
    Add chillers in the Chiller Data tab first.

    Electrical Loss

    Set global loss percentages, then tick which equipment items are affected. Losses are applied during PUE computation.

    UPS Loss
    %
    e.g. transformer + UPS inefficiency
    UPS Recharge Loading
    %
    battery recharge additional draw
    LV/MV Distribution Loss
    %
    e.g. PDU / busway / cable runs
    Equipment Category Rated (kW) UPS Loss Recharge LV/MV Dist Loss
    For Peak PUE
    (with UPS Load)    		 LV/MV Dist Loss
    For Max Demand PUE
    (with UPS+Recharge Load)
    Add items in the Equipment List tab first.

    Ticked items will have the selected losses added to the facility power during PUE calculation.

    Select PUE Calculations to Run

    # Ambient / Condensing Water Temp (°C) Loading (%) COP
    ⟳ Cubic Spline Fits a cubic spline through your data points and shows the curve below.