Compressed Air Receiver Sizing Calculator

Inputs

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Peak free-air demand during the event, in Nl/min or SCFM.
Nl/min
Compressor free-air delivery available while the event is happening.
Nl/min
How long the receiver must cover the demand shortfall.
min
Lowest acceptable receiver gauge pressure before the compressor must catch up.
bar
Receiver gauge pressure at the start of the event.
bar
Allowance for leakage, pressure-drop uncertainty and future air tools.
%
Installed or candidate receiver water volume.
L

Results

Default result
Edit inputs
Flow shortfall to cover(Qd−Qc)
400Nl/min

Receiver storage must cover this demand above compressor FAD.

zero if compressor FAD covers demand

Also computed

Required stored free air240L

at atmospheric pressure

Required receiver volumePass97.25L

Minimum water volume over the entered pressure band.

Selected stored free air1,234L

between cut-out and cut-in

Selected receiver utilizationPass19.4%

Selected receiver covers the calculated storage requirement.

Selected net event time3.085min

How long the selected receiver can cover the compressor shortfall.

against compressor shortfall

Receiver-only reserve time1.028min

if compressor is unavailable

Compressed air receiver pressure-band previewReceiver storage between cut-out and cut-inIdeal-gas free-air storage over the entered pressure band.selected utilization19%stored free air1234 Lshortfall400 Nl/minreserve3.1 min net
Method notes 3 notes
  • Uses ideal-gas, isothermal storage between cut-out and cut-in pressure: stored free air = receiver volume × pressure band / atmospheric pressure.
  • Demand and compressor flow are free-air rates (FAD/SCFM), not compressed tank volume.
  • This is a storage and reserve screen only. Final systems also need rated receiver pressure, inspection rules, safety valves, compressor duty cycle, dryers, condensate drains, pressure drop and local code review.

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