Title :
Temperature control in a cavity of refrigeration using PI controller and predictive control
Author :
Aridhi, Emna ; Abbes, Mehdi ; Mami, Abdelkader
Author_Institution :
Dept. of Phys., Fac. of Sci. of Tunis, El Manar, Tunisia
Abstract :
A PI controller and a generalized predictive control strategy of the temperature inside a cavity of refrigeration are proposed, using Matlab/Simulink environment. The control strategies were applied to a third-order discrete state space system, which computes the internal air temperature according to the temperature at the level of the evaporator exchanger, under the influence of the ambient temperature. The system was obtained by linearization of a pseudo bond graph model of thermal transfers inside the refrigeration cavity. The simulation results were compared to those of the pseudo bond graph model for a classical thermostatic control. The used control strategies allowed an average energy saving of about 70% compared with the conventional on/off controller.The predictive control was more efficient than the PI controller of 23.33 %.
Keywords :
PI control; bond graphs; energy conservation; linearisation techniques; predictive control; refrigeration; state-space methods; temperature control; Matlab-Simulink environment; PI controller; ambient temperature; energy saving; evaporator exchanger; generalized predictive control strategy; internal air temperature; linearization; proportional-integral controller; pseudobond graph model; refrigeration cavity; temperature control; thermal transfer; thermostatic control; third-order discrete state space system; Atmospheric modeling; Cavity resonators; Computational modeling; Predictive control; Software packages; Switches; Temperature control; PI controller; energy saving; predictive control; refrigeration cavity; temperature control;
Conference_Titel :
Sciences and Techniques of Automatic Control and Computer Engineering (STA), 2014 15th International Conference on
DOI :
10.1109/STA.2014.7086788
