Heat Transfer for Flow Outside Tubes

Coefficient of Heat Transfer for Flow Outside Tubes 

For industrial heat exchangers using segmental baffles with unbored shells, the coefficient of heat transfer for the shell-side fluid is expressed in the following equation  

Mass velocity through baffle opening, based on the area of opening less area of the tubes passing through it, lb./hr./sq.ft. 

D j= Inside diameter,tube or pipe, NRe= Reynolds number, w = Rote of flow, u = Viscosity, 

DIRECTIONS FOR USE Line 1 Connect the appropriate volues on the w and /t scales with a straightedge. Line 2 Pivot straightedge about the point where Line 1 intersects the uncalibrated line until it connects with the appropriate value on the D, scale. Result is read where this new line, shown as Line 2, intersects the Nit scale. 

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