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Optimisation et commande prédictive d'un cycle à compression de vapeur sous charge thermique d'impulsion transitoire.

Optimization and predictive control of a vapor compression cycle under transient pulse heat load

Auteurs : YANG Z., POLLOCK D. T., WEN J. T.

Type d'article : Article, Article de la RIF

Résumé

There are well established control methods to stabilize the vapor compression cycle (VCC) about a given operating point. However, it is challenging to design such local controllers to handle large transient heat flux disturbances, due to complex coupling and constraints, and potential violation of critical heat flux (CHF) which could lead to the damaging dryout condition. Since VCCs are locally stable with relatively slow dynamics, model predictive control (MPC) is ideally suited to address these challenges. MPC solves a constrained receding horizon minimization problem under known transient heat disturbance. The objective function is a combination of the exit evaporator wall temperature, which provides an indication for the onset of partial dryout, energy consumption, and control input effort. This paper presents results from the application of MPC to a VCC testbed in our laboratory. We show that MPC can significantly increase the robustness with respect to transient disturbances by moving the system to an advantageous operating point in anticipation of known disturbances.

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Pages : 14-25

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Détails

  • Titre original : Optimization and predictive control of a vapor compression cycle under transient pulse heat load
  • Identifiant de la fiche : 30021900
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 75
  • Date d'édition : 03/2017
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2017.01.009

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