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4

# Plate Fin Heat Exchanger

3 replies to this topic
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### #1 panagiotis

panagiotis

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Posted 16 July 2024 - 11:04 AM

Hello everyone,

Can I consider that there is linear analogy between the number of plates of a plate fin heat exchanger and its duty?

For example if I know the duty and the number of plates of the heat exchanger, can I safely and roughly say that when the duty increases, the number of plates will increase proportionally?

### #2 Pilesar

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Posted 16 July 2024 - 01:54 PM

For example if I know the duty and the number of plates of the heat exchanger, can I safely and roughly say that when the duty increases, the number of plates will increase proportionally?

The number of plates in a heat exchanger are fixed by the manufacturer when the exchanger is built and do not change when the duty changes. The number of plates can be compared to the number of tubes in a shell and tube exchanger where performance depends on many more parameters than the number of tubes.

### #3 breizh

breizh

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Posted 17 July 2024 - 01:22 AM

Hi,

Why don't you perform a simulation to get your answer or ask vendor to size the equipment for you?

Try this simulator for a plate heat exchanger:

https://hisaka-asia.com/web-simulator

Breizh

### #4 shvet1

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Posted 17 July 2024 - 02:25 AM

Can I consider that there is linear analogy between the number of plates of a plate fin heat exchanger and its duty?

Very roughly and in a small extend yes as temperature profile cold and hot sides both change when geometry changes.

Note that total pressure drop of liquids has quadratic function of hydraulic path lenght. In some cases pressure profile change is more critical to heat transfer then total heat transfer area provided.

Edited by shvet1, 17 July 2024 - 02:26 AM.