Plant engineering calculator · Updated 17 September 2026
Cooling Tower Heat Rejection Calculator — Water Flow, Range & Tons
Calculate rejected heat from circulating-water flow and tower range, with kW, refrigeration-ton equivalent and optional chiller-load comparison.
Inputs
Live results
- Range 5.00 °C
- Heat rejected 579.6 kW
- Equivalent 164.8 TR
- Mass flow 27.69 kg/s
Formula and method
Q=ρ·Cp·Vdot·ΔT.
Worked example
100 m³/h of water cooled through 5°C rejects about 581 kW using standard water properties.
Assumptions and limits
- Uses entered/default water density and specific heat.
- Tower selection still depends on wet-bulb temperature, approach, airflow and vendor rating.
Frequently asked questions
What does this Cooling Tower Heat Rejection Calculator calculate?
Calculate rejected heat from circulating-water flow and tower range, with kW, refrigeration-ton equivalent and optional chiller-load comparison.
Is this suitable for final design?
Use it as a transparent engineering screen. Verify final decisions against measured data, OEM curves, applicable standards and site operating limits.
Why are assumptions visible?
Plant calculations can look precise while hiding uncertain inputs. MAXScanner keeps the governing assumptions visible so scenarios can be checked and compared.