How to use the refrigerant mass flow calculator
Find the refrigerant flow needed for a cooling load from the enthalpy change across the evaporator. Enter cooling capacity, enthalpy change across evaporator in the fields above; the refrigerant mass flow are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “refrigerant flow rate”, “cooling load flow”, “refrigeration mass flow”, “calculate refrigerant mass flow”, “find refrigerant mass flow”.
Formula
Variables
- Qc — Cooling capacity (kW)
- dh — Enthalpy change across evaporator (kJ/kg)
Worked example
With cooling capacity = 10 kW, enthalpy change across evaporator = 150 kJ/kg, the calculator gives refrigerant mass flow ≈ 0.06666667 kg/s; refrigerant mass flow ≈ 240 kg/h.
Frequently asked questions
What is the refrigerant mass flow calculator used for?
Find the refrigerant flow needed for a cooling load from the enthalpy change across the evaporator. It helps with questions such as “refrigerant flow rate”, “cooling load flow”, “refrigeration mass flow”.
What is the formula for the refrigerant mass flow calculation?
Refrigerant mass flow (kg/s) = Qc / dh. Refrigerant mass flow (kg/h) = [Refrigerant mass flow] × 3600. Here Qc is cooling capacity (kW), dh is enthalpy change across evaporator (kJ/kg).
What inputs do I need for the refrigerant mass flow calculator?
You need cooling capacity in kW, enthalpy change across evaporator in kJ/kg. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the refrigerant mass flow calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the refrigerant mass flow result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.