Compressed Air Leak Rate Calculator

Compute air loss through an orifice. Optionally include an upstream pipe to account for line pressure drop.

Schematic — pipe of length L and inner diameter DN, with an end orifice of diameter d₀ discharging from p₁ to p₂.

Input Data

Units

Air Temperature (Tₐ)

Primary Pressure (p₁)

Secondary Pressure (p₂)

Diameter of Orifice (d₀)

Discharge Coefficient (C)

Include upstream pipe (compute pressure drop)

Result

Air Flow Rate (Normal)

5.75645

Flow is choked (critical) at the orifice.

Annual Cost of Leak

Compressed Air Cost (EUR/Nm³)

Annual Operating Hours

Annual Air Loss

2763095 Nm³/yr

Annual Cost

69,077 EUR/yr

Annual CO₂ Emissions

Country (grid emission factor)

Specific Energy

0.12 kWh/Nm³

Annual Electricity

331,571 kWh/yr

Annual CO₂

76.26 t/yr