Tunnel Boring & Heavy Civil Equipment worked example

Hydraulic Power Load with hydraulic power load connected load of 6 kW: a worked example

This worked example runs the hydraulic power load numbers for a tougher week than the baseline: hydraulic power load connected load of 6 kW instead of the typical 12 kW. Estimate hydraulic power 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

  • Hydraulic power load connected load: 6 kW (the input this scenario stresses; the baseline uses 12)
  • Hydraulic power load runtime: 8 hr (held at the documented default)
  • Blended electricity rate: 0.12 $ / kWh (held at the documented default)
  • Units processed during runtime: 1,000 units (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total hydraulic power load energy cost = hydraulic power load connected load × hydraulic power load runtime × blended electricity rate.
  • Hydraulic power load energy used works out to 48 kWh at these inputs, and this is the headline figure for the scenario.
  • Total hydraulic power 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 hydraulic power 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 hydraulic power load connected 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 when budgeting a TBM drive, allocating hydraulic energy cost across rings or excavated units, or comparing the running cost of two power-pack configurations. 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

  • Hydraulic power load energy used: 48 kWh (headline result)
  • Total hydraulic power load energy cost: 5.76 $
  • Energy cost per kWh: 0.01 $ / piece
  • Hourly hydraulic power load energy cost: 0.72 $ / hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Hydraulic Power Load calculator, set hydraulic power load connected load to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.