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108 Applied Process Design for Chemical and Petrochemical Plants

Example: If the shell-side
coefficient of a unit is 25
Btu/hr (ft )(°F) and velocity in
2
the shell is doubled, read the
new shell-side coefficient, h a ,
as 36 (line a). If the tube-side
coefficient is 25 and velocity
is doubled, read the new
tube coefficient, h i , as 43.1
(line a). In other cases, pres-
sure drop would increase by
a factor of 4. Note: This may
be used in reverse for
reduced flow.

Figure 10-57. Effect of velocity on heat transfer rates and pressure drop: shell-side and tube-side. (Used by permission: Shroff, P. D. Chemical
Processing, No.4, ©1960. Putnam Publishing Co., Itasca, Ill. All rights reserved.)