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March 23, 2026

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Heat Exchanger Pinch Point

Diagram showing difference between average temperature difference and actual temperature profile inside a heat exchanger
PPI March 22, 2026 0

Why Average Temperature Difference Is Misleading – When a Useful Shortcut Starts Hiding Real Plant Behavior

Average temperature difference is one of the most commonly used concepts in heat transfer. It appears in design calculations, simulations, datasheets, and performance discussions. It is also one of the…

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Diagram showing pinch point and phase change zones where LMTD becomes unreliable in heat exchangers
PPI March 11, 2026 0

When LMTD Fails – Phase Change & Pinch Points – The Situations Where a Reliable Tool Stops Being Reliable

LMTD is one of the most useful tools in heat exchanger design. Under the right conditions, it provides a compact and effective way to represent temperature driving force. However, LMTD…

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Recent Posts

  • Why Average Temperature Difference Is Misleading – When a Useful Shortcut Starts Hiding Real Plant Behavior
  • Clean U vs Dirty U – How Plants Actually Operate – The Gap Between Design Assumptions and Operating Reality
  • Why U Is a Result, Not a Design Input – The Root Cause of Many Fragile Heat Exchanger Designs
  • Why U Values from Books Fail in Plants – Because Real Heat Transfer Is Messier Than Any Table Can Capture
  • Temperature Profiles in Equipment – Why Heat Transfer Is Never Uniform Inside Real Process Equipment

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