Revisiting Example 20.18, by how much should the steam temperature be increased in order to achieve the

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Revisiting Example 20.18, by how much should the steam temperature be increased in order to achieve the 15% increase in boil-up rate for the case when the process-and steam-side heat transfer coefficients are approximately equal?

Assume that this is a nonfouling service, the conduction resistance of the tube wall may be assumed negligible, and Di ≅ Do. In addition, the process fluid may be assumed to be in the convective boiling regime.



Example 20.18

A reboiler for a column is supplied with saturated steam (in shell) at a temperature of 145°C and reboils the bottom product (in tubes) that leaves the column at 122°C. It is desired to increase the boil-up rate by 15% from the design case. How can this change be accomplished?

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Analysis Synthesis And Design Of Chemical Processes

ISBN: 9780134177403

5th Edition

Authors: Richard Turton, Joseph Shaeiwitz, Debangsu Bhattacharyya, Wallace Whiting

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