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May 15, 2026

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Clean U vs Dirty U

Comparison diagram of clean heat exchanger versus fouled exchanger showing difference between clean U and dirty U
PPI March 19, 2026 0

Clean U vs Dirty U – How Plants Actually Operate – The Gap Between Design Assumptions and Operating Reality

In heat exchanger design, calculations almost always begin with a clean U. In plant operation, equipment almost always runs with a dirty U. This gap between clean and dirty conditions…

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