Process Equipment and Plant Design
Floating head heat exchangers are used for the

Cases where temperature difference between the shell and the tubes is more (>50°C)
Heat transfer between corrosive fluids
Co-current heat transfer systems
Counter-current heat transfer systems

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.

Plate tower is preferred over packed tower, if the operation involves liquids containing dispersed solids
Plate tower is perferred, if interstage cooling is required to remove heats of reaction or solution
In operations involving large temperature changes. (e.g. distillation), plate towers are preferred over packed towers as the packing may be crushed due to large temperature changes
The total weight of a dry plate tower is usually much more than that of a dry packed tower designed for the same duty

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