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Application of a reduced dynamic model to the control of a refrigerating cycle.

Author(s) : LEDUCQ D., GUILPART J., TRYSTRAM G.

Summary

The paper presents a dynamic model of a compression cycle. An overall distributed parameter model of a water/water refrigerating unit is described. A reduced model is proposed and consists in a reduced number of ordinary differential equations directly usable for the simulation of the system. In particular the explicit form of the equations shows that the main dynamic characteristic of the two-phase region in the evaporator should be described with a mass balance, which is fundamental for the control of the superheat and, consequently, for the control of the whole system. The reduction procedure is presented, as well as the way to apply it for the control of the loop. The complete and the reduced models are compared with experimental values and the improvement of this control algorithm on the energy performances of the installation is discussed.

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Details

  • Original title: Application of a reduced dynamic model to the control of a refrigerating cycle.
  • Record ID : 2004-1114
  • Languages: English
  • Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
  • Publication date: 2003/08/17

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