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Plant Engineering Calculator

Compressed Air Receiver Fill Time Calculator — Volume, Pressure Band & Compressor Flow

Estimate receiver pressurization time from vessel volume, starting and final absolute pressures and compressor free-air delivery using an isothermal ideal-gas balance.

Inputs

Results

Free-air equivalent required 4.93 m³
Ideal fill time 4.93 min
Ideal fill time 296 s
Average charging rate 1.00 m³/min FAD

Formula

t=V×(P2abs−P1abs)/(Qfree×Patm).

Worked example

A 1 m³ receiver charged across a 5 bar absolute-pressure rise requires about 5 m³ of free-air equivalent before leakage and temperature effects.

Assumptions & limits

  • Assumes approximately isothermal ideal-gas storage and constant free-air delivery.
  • Real compressor capacity changes with pressure; account for leakage, aftercooling and controls for commissioning predictions.

FAQs

What does this Compressed Air Receiver Fill Time Calculator calculate?

Estimate receiver pressurization time from vessel volume, starting and final absolute pressures and compressor free-air delivery using an isothermal ideal-gas balance.

Can I use the result for final equipment selection?

Use it as a transparent engineering and energy-screening result. Verify final decisions with measured site data, OEM curves, applicable standards and operating limits.

Why does MAXScanner show assumptions?

Plant calculations can look exact while depending heavily on operating assumptions. Showing them makes scenarios auditable and easier to compare.

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compressed air storage capacityair receiver sizingair compressor cfm

Last updated: 17 September 2026