Plant Utilities worked example

Plant Air Demand Growth at 98% compressor system efficiency and leakage allowance: a worked example

This scenario runs the plant air demand growth calculation on the strong side: 98% compressor system efficiency and leakage allowance, with every other input held at its documented default. Use it when reviewing plant air demand growth for a utility budget, maintenance priority, capacity check, energy project, or production support plan.

The inputs for this scenario

  • Current compressed air demand: 1,250 SCFM (unchanged)
  • Added demand per new production line: 180 SCFM / line (unchanged)
  • Compressor system efficiency and leakage allowance: 98 % (raised for this scenario; the documented default is 85)

Working through the calculation

  • Applying the documented formula (Required future air demand = current compressed air demand × growth per new line ÷ compressor system efficiency allowance) to the inputs above produces each figure below.
  • At this operating point the engine returns 229,592 SCFM for required quantity, the number this scenario is built around.
  • At this operating point the engine returns 225,000 SCFM for theoretical added demand.
  • At this operating point the engine returns 4,592 SCFM for efficiency and leakage allowance.
  • At this operating point the engine returns 98 % for compressor system efficiency allowance.

How this compares with the baseline

  • Against the tool's baseline example, where compressor system efficiency and leakage allowance sits at 85% and the headline result is 264,706 SCFM, this scenario comes in 13.27% below the baseline at 229,592 SCFM.
  • Use it in capacity planning when adding production lines or auditing whether the compressor room can support a growth forecast. 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

  • Required quantity: 229,592 SCFM (headline result)
  • Theoretical added demand: 225,000 SCFM
  • Efficiency and leakage allowance: 4,592 SCFM
  • Compressor system efficiency allowance: 98 %

Run it with your numbers

  • Every input above is editable in the live Plant Air Demand Growth calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.