A process stream is cooled from 80C to 40C in a shell-and-tube heat exchanger using cooling water in the tube side that enters the cooler at 30C and leaves at 38C under nominal condition. It has been determined that the process side resistance to heat transfer is dominant. It is desired that the process fluid flowrate through the cooler be decreased to 60% of its nominal value. For this condition, answer the following: a) By how much the cooling water flowrate be changed to maintain the process side exit temperature at 40C?    (b)   What is the exit temperature of the cooling water in this case?

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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A process stream is cooled from 80C to 40C in a shell-and-tube heat exchanger using cooling water in the tube side that enters the cooler at 30C and leaves at 38C under nominal condition. It has been determined that the process side resistance to heat transfer is dominant. It is desired that the process fluid flowrate through the cooler be decreased to 60% of its nominal value. For this condition, answer the following:

a) By how much the cooling water flowrate be changed to maintain the process side exit temperature at 40C?   

(b)   What is the exit temperature of the cooling water in this case?

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