[ Calcul Rapide des Propriétés Thermodynamiques des Frigorigènes ]
Volume 14, Issue 1, January 2016, Pages 106–112
Mustapha Kourchi1 and Azeddine Rachdy2
1 Laboratoire LASIME, ESTA, BP 33S, Agadir, Morocco
2 Laboratoire LASIME, ESTA, BP 33S, Agadir, Morocco
Original language: French
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Dynamic simulation of refrigeration systems needs computer routines for calculation of the thermodynamic properties of refrigerants. These routines must be simple, and computationally fast with accuracy adequate for commonly encountered refrigeration condition. An approach, widely used, is proposed by Cleland in the form of curve-fitted equation. The execution speed of these equations is fast, but their accuracy levels decrease as the duration of simulation increases.
This paper proposes a solution of this problem based on new system of equations. The proposed solution enables to obtain more accuracy and a fast execution speed. A more recent thermodynamic database is used in the equations curve-fits. The equations system proposed enables a modelling of the refrigeration systems with a fast execution speed and a better accuracy than that obtained by a Cleland's equations.
Author Keywords: refrigerants, thermophysical properties, quick calculation.
Volume 14, Issue 1, January 2016, Pages 106–112
Mustapha Kourchi1 and Azeddine Rachdy2
1 Laboratoire LASIME, ESTA, BP 33S, Agadir, Morocco
2 Laboratoire LASIME, ESTA, BP 33S, Agadir, Morocco
Original language: French
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Dynamic simulation of refrigeration systems needs computer routines for calculation of the thermodynamic properties of refrigerants. These routines must be simple, and computationally fast with accuracy adequate for commonly encountered refrigeration condition. An approach, widely used, is proposed by Cleland in the form of curve-fitted equation. The execution speed of these equations is fast, but their accuracy levels decrease as the duration of simulation increases.
This paper proposes a solution of this problem based on new system of equations. The proposed solution enables to obtain more accuracy and a fast execution speed. A more recent thermodynamic database is used in the equations curve-fits. The equations system proposed enables a modelling of the refrigeration systems with a fast execution speed and a better accuracy than that obtained by a Cleland's equations.
Author Keywords: refrigerants, thermophysical properties, quick calculation.
Abstract: (french)
La simulation dynamique des systèmes de réfrigérations requiert l'utilisation de routines de calcul des propriétés thermodynamiques des frigorigènes. Ces routines doivent assurer une vitesse d'exécution rapide et une précision du calcul acceptable dans les conditions frigorifiques habituelles. Une approche, largement utilisée encore, est proposée par Cleland sous forme d'équations ajustées. La vitesse d'exécution de ces équations est rapide, mais leur degré de précision se détériore au fur et à mesure que la durée de simulation augmente.
Cet article propose une solution à ce problème basée sur un nouveau système d'équations. La solution proposée permet d'améliorer la précision du calcul tout en maintenant une vitesse d'exécution rapide. Une base de données NIST REFPROP est utilisée dans l'ajustement des équations. Le système d'équations proposé permet une modélisation des systèmes de réfrigération avec une vitesse de calcul rapide et une précision meilleure que celle obtenue à l'aide du système d'équations de Cleland.
Author Keywords: frigorigènes, Propriétés thermophysiques, calcul rapide.
How to Cite this Article
Mustapha Kourchi and Azeddine Rachdy, “Fast Calculation of Thermodynamic Properties of Refrigerants,” International Journal of Innovation and Applied Studies, vol. 14, no. 1, pp. 106–112, January 2016.
