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IGC's operations area personnel are experiencing problems

Process Dynamics and Control | 3rd Edition | ISBN: 9780470128671 | Authors: Dale E. Seborg ISBN: 9780470128671 148

Solution for problem 12.15 Chapter 12

Process Dynamics and Control | 3rd Edition

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Process Dynamics and Control | 3rd Edition | ISBN: 9780470128671 | Authors: Dale E. Seborg

Process Dynamics and Control | 3rd Edition

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Problem 12.15

IGC's operations area personnel are experiencing problems with a particular feedback control loop on an interstage cooler. Appelpolscher has asked you to assess the situation and report back what remedies, if any, are available. The control loop is exhibiting an undesirable sustained oscillation that the operations people are sure is caused by the feedback loop itself (e.g., poor controller tuning). They want assistance in retuning the loop. Appelpolscher thinks that the oscillations are caused by external disturbances (e.g., cyclic disturbances such as cycling of the cooling water temperature); he wants the operations people to deal with the problem themselves. Suggest a simple procedure that will allow you to determine quickly what is causing the oscillations. How will you explain your logic to Appelpolscher?

Step-by-Step Solution:
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Isotropy and T ensor Components ( 4 Order via 2 nd Order Case) A A  A   A   ijkl 1 ijkl 2 ik jl 3 il jk k k  ij ij Isotropic forms: 4 order (NCE); 2ndorder (thermal conductivity) CHE377 – Fall 2016 1 Two Observers Original (Unprimed) & Primed Coords. ei  e ie)je j Qij j ei  e ie)j  j Qji j Looks like Q is Q -1 CHE377 – Fall 2016 2 Q is an orthogonal matrix  e e  (Q e ) Q e  Q  Q e ( e ) ij i j ik k jl l ik jl k l t Q Q ikQjl kl Q ik jk ik kj  e e 

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Chapter 12, Problem 12.15 is Solved
Step 3 of 3

Textbook: Process Dynamics and Control
Edition: 3
Author: Dale E. Seborg
ISBN: 9780470128671

The answer to “IGC's operations area personnel are experiencing problems with a particular feedback control loop on an interstage cooler. Appelpolscher has asked you to assess the situation and report back what remedies, if any, are available. The control loop is exhibiting an undesirable sustained oscillation that the operations people are sure is caused by the feedback loop itself (e.g., poor controller tuning). They want assistance in retuning the loop. Appelpolscher thinks that the oscillations are caused by external disturbances (e.g., cyclic disturbances such as cycling of the cooling water temperature); he wants the operations people to deal with the problem themselves. Suggest a simple procedure that will allow you to determine quickly what is causing the oscillations. How will you explain your logic to Appelpolscher?” is broken down into a number of easy to follow steps, and 123 words. Since the solution to 12.15 from 12 chapter was answered, more than 410 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 12.15 from chapter: 12 was answered by , our top Engineering and Tech solution expert on 11/15/17, 04:03PM. This textbook survival guide was created for the textbook: Process Dynamics and Control, edition: 3. Process Dynamics and Control was written by and is associated to the ISBN: 9780470128671. This full solution covers the following key subjects: Loop, appelpolscher, operations, feedback, people. This expansive textbook survival guide covers 24 chapters, and 420 solutions.

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IGC's operations area personnel are experiencing problems