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Heat Exchanger Technology

Tuesday, February 17, 2009

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WATER - Fouling Factors in [m2K/W]

Water Type Tcw < 50 ° C
Tf < 120 ° C		Tcw > 50 ° C
Tf > 120 ° C

v < 1 m/s
v > 1 m/s v < 1 m/sv > 1 m/s
Sea0.000090.000090.000180.00018
Brackish0.000350.000180.000530.00035
Cooling tower with inhibitor0.000180.000180.000350.00035
Cooling tower without inhibitor 0.000530.000530.000880.00070
City grid0.000180.000180.000350.00035
River mimimum0.000180.000180.000350.00035
River average0.000530.000350.000700.00035
Engine jacket0.000180.000180.000180.00018
Demineralized or distilled0.000090.000090.000090.00009
Treated Boiler Feedwater0.000180.000090.000180.00018
Boiler blowdown0.000350.000350.000350.00035

Tcw = Water temperature
Tf = Fluid temperature
v = Water velocity

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