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Document IIF
Instabilité d'un système de conditionnement d'air automobile à compresseur volumétrique. 1. Etude expérimentale.
Instability of automotive air conditioning system with a variable displacement compressor. 1. Experimental investigation.
Résumé
A test system is built first in order to investigate the instability of the automotive air conditioning (AAC) system with a variable displacement compressor (VDC), and hunting phenomena caused by the large external disturbance in the AAC system with a VDC and a thermal expansion valve, and in the AAC system with a VDC and a fixed-area throttling device are investigated experimentally in this paper (see also this Bulletin, reference 2005-2790). The experimental results indicate that there also exist the hunting phenomena in the AAC system with a fixed-area throttling device. The system stability is found to be dependent on the direction of the external disturbance, and the system is apt to cause hunting when the condensing pressure decreases excessively since it may cause two-phase state at the throttling device inlet and make a large disturbance to the system. The piston stroke length will oscillate only when the oscillation amplitudes of forces acting on the wobble plate are great enough, otherwise the piston stroke length will be kept invariable, and then the system instability rule is also suitable for the AAC system with a fixed displacement compressor. From the experimental results, it is concluded that the two-phase flow at the throttling device inlet or at the evaporator outlet is the necessary condition but not sufficient condition for system hunting. Finally, a new concept (conservative stable region) is proposed based on the experimental results and theoretical analysis.
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Détails
- Titre original : Instability of automotive air conditioning system with a variable displacement compressor. 1. Experimental investigation.
- Identifiant de la fiche : 2005-2791
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 28 - n. 7
- Date d'édition : 11/2005
Liens
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Indexation
- Thèmes : Conditionnement d'air mobile
- Mots-clés : Variation; Géometrie; Automobile; Volume; Experimentation; Essai; Détente; Conditionnement d'air; Compresseur
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Experimental investigation and numerical simula...
- Auteurs : TIAN C., LI X., DOU C.
- Date : 11/2005
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 28 - n. 7
- Formats : PDF
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A mathematical model of variable displacement s...
- Auteurs : TIAN C. Q., LIAO Y. F., LI X. T.
- Date : 03/2006
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 29 - n. 2
- Formats : PDF
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Dynamic behaviour of a variable displacement co...
- Auteurs : TIAN C., DOU C., YANG X., et al.
- Date : 16/07/2002
- Langues : Anglais
- Source : 2002 Purdue conferences. 2002 compressor engineering & refrigeration and air conditioning conferences at Purdue [CD-ROM].
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Conditionnement d'air automobile grâce à un com...
- Auteurs : KAWAZUMI J., MIYAGAWA K., KAWAGUCHI M.
- Date : 09/1999
- Langues : Japonais
- Source : Refrigeration - vol. 74 - n. 863
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Dynamic behaviour of control valve in variable ...
- Auteurs : YANG X., DOU C., TIAN C., et al.
- Date : 16/07/2002
- Langues : Anglais
- Source : 2002 Purdue conferences. 2002 compressor engineering & refrigeration and air conditioning conferences at Purdue [CD-ROM].
Voir la fiche