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Vol. 84, Issue 10, October 2007, pp.1677-1686




Model Based Controller Design for a Shell and Tube Heat Exchanger


1S. Nithya, 2Abhay Singh Gour, 3N. Sivakumaran, 4T. K. Radhakrishnan and 5N. Anantharaman

1School of Electrical and Electronics Engineering,

Shanmugha Arts Science Technology Research Academy (SASTRA),

Tirumalaisamudram, Thanjavur, Tamil Nadu, India, 613402

3Department of Instrumentation and Control Engineering, National Institute of Technology,

Tiruchirapalli, TamilNadu, India, 620015

2,4,5Department of Chemical Engineering, National Institute of Technology,

Tiruchirapalli, TamilNadu, India 620015

E-mail: nithya.venkatesan@gmail.com, nsk@nitt.edu



Received: 2 July 2007   /Accepted: 23 October 2007   /Published: 30 October 2007


Abstract: In all the process industries the process variables like flow, pressure, level and temperature are the main parameters that need to be controlled in both set point and load changes. The transfer of heat is one of the main important operation in the heat exchanger .The transfer of heat may be fluid to fluid, gas to gas i.e. in the same phase or the phase change can occur on either side of the heat exchanger. The control of heat exchanger is complex due to its nonlinear dynamics. For this nonlinear process of a heat exchanger the model is identified to be First Order plus Dead Time (FOPDT).The Internal Model Control (IMC) is one of the model predictive control methods based on the predictive output of the process model. The conventional controller tuning is compared with IMC techniques and it found to be suitable for heat exchanger than the conventional PI tuning.


Keywords: Process modeling, FOPDT, Controller, Internal model control, Heat exchanger


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