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.

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## 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)

To calculate heat exchanger duty, multiply the fluidmass flow rate by the latent heat.

## How to Calculate Heat Exchanger Duty?

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

- First, determine the fluid mass flow rate through the exchanger (kg/s).
- Next, determine the latent heat (kJ/kg).
- Next, gather the formula from above = HED = M * LH.
- Finally, calculate the Heat Exchanger Duty.
- 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** **= ?