Plant engineering calculator · Updated 17 September 2026
Chiller Heat Rejection Calculator — Cooling Load + Compressor Power
Calculate condenser heat rejection as evaporator cooling load plus compressor input, with kW and refrigeration-ton outputs and rejection ratio.
Inputs
Live results
- Heat rejection 1200.0 kW
- Heat rejection 341.2 TR
- Rejection ratio 1.200
- COP 5.00
Formula and method
Qreject=Qcooling+Pcompressor.
Worked example
A chiller delivering 1,000 kW cooling at 200 kW input rejects about 1,200 kW at the condenser.
Assumptions and limits
- Steady-state energy balance excludes auxiliary heat unless explicitly added.
- Use measured simultaneous load and power for operating diagnostics.
Frequently asked questions
What does this Chiller Heat Rejection Calculator calculate?
Calculate condenser heat rejection as evaporator cooling load plus compressor input, with kW and refrigeration-ton outputs and rejection ratio.
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.