Abstract
The approximate overall heat transfer coefficient U can be determined from the following equation:
where U is the overall heat transfer coefficient [Btu/(ft2-hr-°F)]; h i is the inside film coefficient [Btu/(ft2-hr-°F)]; F i is the inside fouling factor [(ft2-hr-°F)/Btu]. l w is the wall thickness (ft); k w is the thermal conductivity of the wall [(Btu-ft)/(ft2-hr-°F)]; F o is the outside fouling factor [(ft2-hr-°F)/Btu]; h o is the outside film coefficient [Btu/(ft2-hr-°F)]. A graphical representation of the various terms is shown in Figure 8.1. In Figure 8.1, the fouling factors F i and F o are expressed as L i/k i and L o/k o.
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References
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© 1978 Plenum Press, New York
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Aerstin, F., Street, G. (1978). Heat Transfer. In: Applied Chemical Process Design. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3976-2_9
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DOI: https://doi.org/10.1007/978-1-4613-3976-2_9
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