Typical overall heat transfer coefficients (U) for air cooled heat exchangers

Asked by alsieg 5 years, 3 months ago | 1 Answers


1 Answer

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ChemKB 5 years, 3 months ago
Service Typical Overall Heat transfer Coefficients U, W/m2-K
  Bare Surface Finned Surface
Air or flue gas @ 50 psig, (∆P = 1 psi) 10 0.6
Air or flue gas @ 100 psig, (∆P = 2 psi) 20 1.2
Air or flue gas @ 100 psig, (∆P = 5 psi) 30-50 1.7 – 2.5
 
Hydrocarbon gases @ 15-50 psig, (∆P = 1 psi) 30 – 40 1 – 2.3
Hydrocarbon gases @ 50-250 psig, (∆P = 3 psi) 50 – 60 2 – 3.5
Hydrocarbon gases @ 250-1,500 psig, (∆P = 5 psi) 70 – 90 3.5 – 5.3
 
Steam 130 – 140 7 – 8.2
 
Light hydrocarbons 75 – 95 4 – 5.6
Process water 105 – 120 6.1 – 7
Engine jacket water 120 – 130 5.9 – 7.6

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