
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: McGraw-Hill Education
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Transcribed Image Text:9.1. A pneumatic PI temperature controller has an output pressure of 10 psig when the set point
and process temperature coincide. The set point is suddenly increased by 10°F (i.e., a step
change in error is introduced), and the following data are obtained:
Time, s
psig
0-
10
0+
8
20
7
60
90
5
3.5
Determine the actual gain (psig per degree Fahrenheit) and the integral time.
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