Enthalpy predictive functional control of a pasteurisation plant based on a plate heat exchanger
by Mohamed Tarek Khadir
International Journal of Modelling, Identification and Control (IJMIC), Vol. 13, No. 1/2, 2011

Abstract: Model predictive control (MPC) has been proven its efficiency in several industrial applications for over three decades. In this paper, predictive functional control (PFC) in its first order as well as its higher order forms is applied to control the pasteurisation temperature in a plate heat exchanger. The originality of the paper lies in the investigation of four control approaches using a combination of manipulated variables (medium temperature and product flow) tested in the presence of input disturbances and setpoint changes, leading to the so called 'enthalpy gearbox'. The paper describes the broad lines of first principles modelling of the studied pasteurisation plant sections, as well as giving an idea of the model accuracy when compared to real plant behaviour. A reminder of the first order PFC formulation as well as the full derivation of the analytical higher PFC control laws and the adequacy of a given control law over another are given. The PFC enthalpy approach (enthalpy gearbox) is finally compared in terms of performances to the simple PFC control scheme as well as the revisited performances given by classical control (PID) in terms of mean absolute error (MAE), overshooting and constraints violation.

Online publication date: Sat, 21-Mar-2015

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Modelling, Identification and Control (IJMIC):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com