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Heat Exchanger Technology

Wednesday, February 18, 2009

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Tubular Exchanger Manufacturers Association (TEMA) has developed a series of fouling factor for Shell and Tube (S&T). These fouling factor are generally higher than Plate Heat Exchanger (PHE), why not use S&T fouling factors to size PHE ?

Isn't this approach conservative and guarantee the performance ?

Reason being...
  • Oversized Plate Heat Exchanger (PHE) required extra CAPEX and extra Space for oversized PHE
  • Tubulence minimise fouling tendencies in correctly sized PHE. Oversized PHE results low actual velocity and increase potential fouling and inefficient heat transfer
  • HTRI studies showed PHE fouling significant lower than Shell & Tube Heat Exchanger (S&T)... factor of 6.7
GUIDELINE : Do not oversized PHE more than 25% against required area.

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posted by Webworm, 12:14 PM


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