Tunnel Boring & Heavy Civil Equipment worked example

Cooling System Load with cooling system connected electrical load of 6 kW: a worked example

This worked example runs the cooling system load numbers for a tougher week than the baseline: cooling system connected electrical load of 6 kW instead of the typical 12 kW. Estimate cooling system load for tunnel boring and heavy civil equipment using production-ready inputs so teams can budget energy cost, compare equipment settings, or include electricity in the quote.

The inputs for this scenario

  • Cooling system connected electrical load: 6 kW (the input this scenario stresses; the baseline uses 12)
  • Cooling system runtime this shift: 8 hr (held at the documented default)
  • Blended underground electricity rate: 0.12 $ / kWh (held at the documented default)
  • Advance output during runtime: 1,000 units (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total cooling system load energy cost = cooling system load connected load × cooling system load runtime × blended electricity rate.
  • Cooling system load energy used works out to 48 kWh at these inputs, and this is the headline figure for the scenario.
  • Total cooling system load energy cost works out to 5.76 $ at these inputs.
  • Energy cost per kWh works out to 0.01 $ / piece at these inputs.
  • Hourly cooling system load energy cost works out to 0.72 $ / hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where cooling system connected electrical load sits at 12 kW and the headline result is 96 kWh, this scenario comes in 50% below the baseline at 48 kWh.
  • Use it to budget cooling energy for a shift, allocate power cost against advance, or flag a rising per-unit cost that signals fouling or a control fault. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Cooling system load energy used: 48 kWh (headline result)
  • Total cooling system load energy cost: 5.76 $
  • Energy cost per kWh: 0.01 $ / piece
  • Hourly cooling system load energy cost: 0.72 $ / hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Cooling System Load calculator, set cooling system connected electrical load to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.