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Shell and Tube Heat Exchanger, Empirical Modeling Using System Identification

  • Firew Dereje OlanaEmail author
  • Beza Nekatibeb Retta
  • Tadele Abera Abose
  • Samson Mekibib Atnaw
Conference paper
  • 32 Downloads
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 308)

Abstract

In many industrial process and operations, shell and tube heat exchangers are one of the most important thermal devices that sustained a wide range of operating temperature and pressure. However, the nonlinearity nature of the heat exchangers, and the exclusions of disturbances and uncertainties in linear models, makes the task of mathematical modeling of the system becomes challenging. Here, the solution followed for such problems is experimentally finding linear mathematical model that includes the effect of disturbances. To avoid problem of the system nonlinearities, the overall system is partitioned in to three operating ranges. Then, experimentally generated input-output data has been used in the MATLAB in order to identify the three partitioned system models. For each particular operating range, input-output data has been collected and analyzed using MATLAB environment. After iterative procedure, the plant models are obtained with satisfactory accuracy and residual analysis within range of limits. The results showed that the first test, the second test and the third test models have the best fit of 80.28%, 81.16% and 80.86% respectively. Finally, the overall model is approximated to single linear model that represent all operating ranges.

Keywords

Heat exchanger System partitioning System identification Linear approximation 

Notes

Acknowledgment

The Authors would like to acknowledge Department of Chemical Engineering of Addis Ababa Science and Technology University for their help during experimental setup.

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Copyright information

© ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2020

Authors and Affiliations

  • Firew Dereje Olana
    • 1
    Email author
  • Beza Nekatibeb Retta
    • 2
  • Tadele Abera Abose
    • 3
  • Samson Mekibib Atnaw
    • 2
  1. 1.Faculty of Engineering and TechnologyMettu UniversityMettuEthiopia
  2. 2.Addis Ababa Science and Technology UniversityAddis AbabaEthiopia
  3. 3.Addis Ababa Institute of TechnologyAddis Ababa UniversityAddis AbabaEthiopia

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