Desalination & Membrane Water Treatment Equipment worked example

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

This scenario runs the pump energy cost calculation on the strong side: 92% pump duty share included, with every other input held at its documented default. Use it when pump energy cost in desalination and membrane water treatment equipment is being put through a desalination and membrane water treatment equipment weighted-cost review.

The inputs for this scenario

  • Treated water volume: 100 m³ (unchanged)
  • High-pressure pump energy cost per m³: 45 $ / m³ (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 energy cost = treated water volume × pump energy cost per volume × pump duty share included) to the inputs above produces each figure below.
  • At this operating point the engine returns 4,390 $ for total pump energy cost, the number this scenario is built around.
  • At this operating point the engine returns 43.9 $ / piece for pump energy cost per m³.
  • At this operating point the engine returns 4,140 $ for included variable pump energy 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 $.
  • Use it to cost a production run, build a specific-energy estimate, or test how a tariff or efficiency change moves the pumping bill. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Total pump energy cost: 4,390 $ (headline result)
  • Pump energy cost per m³: 43.9 $ / piece
  • Included variable pump energy cost: 4,140 $
  • Fixed demand or standby charge: 250 $

Run it with your numbers

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

Last reviewed 2026-05-12.