Enter the fluid mass flow rate through the exchanger (kg/s) and the latent heat (kJ/kg) into the Heat Exchanger Duty Calculator. The calculator will evaluate the Heat Exchanger Duty. 

Heat Exchanger Duty Formula

The following two example problems outline the steps and information needed to calculate the Heat Exchanger Duty.

HED = M * LH

Variables:

  • HED is the Heat Exchanger Duty (kW)
  • M is the fluid mass flow rate through the exchanger (kg/s) 
  • LH is the latent heat (kJ/kg) 

How to Calculate Heat Exchanger Duty?

The following steps outline how to calculate the Heat Exchanger Duty.


  1. First, determine the fluid mass flow rate through the exchanger (kg/s). 
  2. Next, determine the latent heat (kJ/kg). 
  3. Next, gather the formula from above = HED = M * LH.
  4. Finally, calculate the Heat Exchanger Duty.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

fluid mass flow rate through the exchanger (kg/s) = 75

latent heat (kJ/kg) = 100

HED = M * LH = ?