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THE FEUTEX TOOLKIT

Heat Exchanger Fouling Impact

Compare clean and fouled overall coefficient at fixed thermal driving force.

Thermal workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
Formula1/Udirty=1/Uclean+Rf,i+Rf,o.
Sources and model references

Worked example

Inputs

Clean overall U
1000 W/(m²·K)
Inside fouling resistance on common area basis
0.0002 m²·K/W
Outside fouling resistance on common area basis
0.0003 m²·K/W
Heat transfer area
10 m²
LMTD
30 K

Expected results

Fouled U value
666.6666667 W/(m²·K)
Fouled duty at fixed LMTD
200000 W
Fractional duty reduction
0.3333333333

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter every input in the labeled units; use measured or independently specified properties.
  2. Check the stated model assumptions before calculating.
  3. Interpret the output as a model estimate and verify it independently for the intended application.

Try this example

{
  "clean": 1000,
  "inside": 0.0002,
  "outside": 0.0003,
  "area": 10,
  "lmtd": 30
}

Accuracy and scope

All resistances use the same area basis; fixed LMTD comparison does not solve changed stream outlets. Educational engineering estimate only; not structural or safety certification, equipment selection, or operating recommendations.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.