District Energy & Thermal Network Equipment worked example

Pump Power Cost at 92% pump duty share included: a worked example

What does the result look like when pump duty share included reaches 92%? The full calculation is worked below with real intermediate numbers. Use it when pump power cost in district energy and thermal network equipment is being put through a district energy and thermal network equipment weighted-cost review.

The inputs for this scenario

  • Pumped loop volume or duty units: 100 m³, kgal, or pump-hr (unchanged)
  • Pump energy cost per duty unit: 45 $ / unit (unchanged)
  • Pump duty share included: 92 % (raised for this scenario; the documented default is 80)
  • Fixed demand or standby charge: 250 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Included variable pump power cost = pumped loop volume or duty units × pump energy cost per duty unit × pump duty share included) to the inputs above produces each figure below.
  • At this operating point the engine returns 4,390 $ for total pump power cost, the number this scenario is built around.
  • At this operating point the engine returns 43.9 $ / piece for pump power cost per duty unit.
  • At this operating point the engine returns 4,140 $ for included variable pump power cost.
  • At this operating point the engine returns 250 $ for fixed demand or standby charge.

How this compares with the baseline

  • Against the tool's baseline example, where pump duty share included sits at 80% and the headline result is 3,850 $, this scenario comes in 14.03% above the baseline at 4,390 $.
  • A figure at this level is achievable when pump duty share included is genuinely sustained, not just peaked for a shift. It applies a single flat energy rate and duty share; it does not model time-of-use tariffs, variable-speed pump curves, or seasonal flow swings within the period.

Results at a glance

  • Total pump power cost: 4,390 $ (headline result)
  • Pump power cost per duty unit: 43.9 $ / piece
  • Included variable pump power cost: 4,140 $
  • Fixed demand or standby charge: 250 $

Run it with your numbers

  • Every input above is editable in the live Pump Power Cost calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.