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Plant Engineering Calculator

Compressed Air Aftercooler Duty Calculator — Sensible Cooling Load

Calculate approximate aftercooler sensible duty from air mass flow, inlet/outlet temperature and average Cp.

Inputs

Results

Temperature drop 80.0 K
Sensible duty 97.0 kW
Heat rejection 330841 BTU/h
Annual sensible heat 581760 kWh

Formula

Q=m·Cp(Tin−Tout).

Worked example

1.2 kg/s compressed air cooled from 120°C to 40°C at Cp=1.01 kJ/kg-K rejects about 97 kW sensible heat.

Assumptions & limits

  • Sensible-gas cooling only; condensate latent heat can increase actual cooler duty.
  • Use actual mass flow and property data for final heat-exchanger sizing.

FAQs

What does this Compressed Air Aftercooler Duty Calculator calculate?

Calculate approximate aftercooler sensible duty from air mass flow, inlet/outlet temperature and average Cp.

Which inputs matter most?

Use measured operating data where possible and keep pressure, temperature, flow, efficiency and tariff inputs on the stated basis. Intermediate outputs make the calculation auditable.

Can I use this for final equipment selection?

Use it for engineering screening and scenario comparison. Confirm final selections against OEM curves, steam/property tables, applicable codes and project design conditions.

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Last updated: 2026-09-17