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Kettle Horizontal Reboiler

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ett e or zonta re o ers cons st o e t er a   - un e or 

a shell and tube bundle inserted into an enlarged shell.

The enlarged shell provides disengaging space for the vapor 

outs e an a ove t e qu , w c s usua y e y evecontrol at the top level of the tube bundle or possibly a few

.

e ea ng me um s ns e e u es.

e mec an sm o o ng s essent a y nuc ea e poo

boiling.

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Desi ns Procedure

The followin nucleate or alternate desi ns rocedure

suggested by Kern, is for vaporization (nucleate or pool

.

boil-ing fluid.

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T b W ll T t

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Tube Wall Temperature

Effective tube length

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Effective tube length

ne c a enge n e es gn o - u e ea exc angers s o e erm ne e e ec ve

length of the tubes.

The effective tube length, Le, of the bundle for surface area calculations is the mean of

the tube lengths between the outside tubes and the inside tubes.

In calculating the optimum U-tube heat exchanger design, most designers estimate theeffective tube length for each of the various heat exchangers.

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