Industrial Filtration, Separation & Dust Collection worked example

Pressure Drop Energy Cost at 110% share of runtime at the elevated drop: a worked example

Push share of runtime at the elevated drop up to 110% and the picture changes. This example computes every intermediate figure at that operating point. Use it when comparing filter media, cleaning settings, duct losses, or replacement timing based on differential pressure energy impact.

The inputs for this scenario

  • Annual runtime at elevated pressure drop: 2,000 hr (unchanged)
  • Incremental fan energy cost per pressure-drop hour: 14 $ / hr (unchanged)
  • Share of runtime at the elevated drop: 110 % (raised for this scenario; the documented default is 100)
  • Fixed demand charge or test cost: 800 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable pressure drop energy cost = runtime at elevated pressure drop × energy cost per pressure-drop hour × included operating share) to the inputs above produces each figure below.
  • At this operating point the engine returns 31,600 $ for total pressure drop energy cost, the number this scenario is built around.
  • At this operating point the engine returns 15.8 $ / hr for energy cost per pressure-drop hour.
  • At this operating point the engine returns 30,800 $ for variable pressure drop energy cost.
  • At this operating point the engine returns 800 $ for fixed demand or test cost.

How this compares with the baseline

  • Against the tool's baseline example, where share of runtime at the elevated drop sits at 100% and the headline result is 28,800 $, this scenario comes in 9.72% above the baseline at 31,600 $.
  • It computes the total annual cost of operating at elevated pressure drop by combining runtime, an incremental energy rate, an operating-share factor, and a fixed cost. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Total pressure drop energy cost: 31,600 $ (headline result)
  • Energy cost per pressure-drop hour: 15.8 $ / hr
  • Variable pressure drop energy cost: 30,800 $
  • Fixed demand or test cost: 800 $

Run it with your numbers

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

Last reviewed 2026-05-12.