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Heat Transfer in Shell and Tube Heat Exchangers
Santhosh Varadarajan
David Belair
Sara Balander
Introduction
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View Full Document The purpose of this lab is to show the existence of convective heat transfer in heat
exchangers, using both the cocurrent and counter current cases. We will hold the shellside flow
rate constant, and vary the tube side flow rate. By doing this we can use the Wilson Plot Method
of Analysis to calculate the individual heat transfer coefficients. After finding these we can
compare them to the predicted values using empirical correlations.
Theory
Since the heat exchanger we are dealing with is a concentrictube and is assumed to be
well insulated from its surroundings, we can find the rate of heat transfer from the fluid inside to
the fluid in the shell space. We can do this by using the simple equation:
=

=

Q mtCpiTto Tti msCpsTsi Tso
We can express this rate of heat transfer in terms of the total thermal resistance and the logmean
temperature difference between the two fluids:
=
=
/
Q UA∆Tln
∆Tln RTtotal
In this equation the logmean temperature difference is shown by
∆Tln
and the total thermal
resistance is shown by
RTtotal
. The total thermal resistance can be shown by the sum of the
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This note was uploaded on 11/02/2009 for the course CHEM 378 taught by Professor Corti during the Spring '09 term at Purdue UniversityWest Lafayette.
 Spring '09
 Corti

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