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Theoretical and experimental investigation on the performance of screw refrigeration compressor under part-load conditions / Wenqing Chen in International journal of refrigeration, Vol. 34 N° 4 (Juin 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 1141-1150 Titre : Theoretical and experimental investigation on the performance of screw refrigeration compressor under part-load conditions Titre original : Etude théorique et expérimentale sur la performance des compresseurs à vis sous des conditions de charge partielle Type de document : texte imprimé Auteurs : Wenqing Chen, Auteur ; Ziwen Xing, Auteur ; Hao Tang, Auteur Année de publication : 2011 Article en page(s) : pp. 1141-1150 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Refrigeration  system  Screw  compressor  Modelling  Experimentation  Performance Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Slide valve is normally employed in screw refrigeration compressor to meet the cooling capacity demanded by the load variation. A mathematical model describing the working process of screw refrigeration compressor with a slide valve assembly under part-load conditions is established based on the calculation of the effective by-pass area and radial discharge area. Experimental investigation on a screw refrigeration compressor under part-load conditions with several evaporation and condensation temperatures is also carried out. Simulation results are in good agreement with the experimental ones. With the validated model, effects of key design parameters, i.e. the installation angles of the slide valve relative to the cylinder and the slide stop length, on the working process and performance of screw refrigeration compressor have been analyzed. These results can be useful for optimum design of the slide valve assembly to improve the energy efficiency of refrigeration system with screw compressor under part-load conditions. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000351 [article] Theoretical and experimental investigation on the performance of screw refrigeration compressor under part-load conditions = Etude théorique et expérimentale sur la performance des compresseurs à vis sous des conditions de charge partielle [texte imprimé] / Wenqing Chen, Auteur ; Ziwen Xing, Auteur ; Hao Tang, Auteur . - 2011 . - pp. 1141-1150. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 1141-1150 Mots-clés : Refrigeration  system  Screw  compressor  Modelling  Experimentation  Performance Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Slide valve is normally employed in screw refrigeration compressor to meet the cooling capacity demanded by the load variation. A mathematical model describing the working process of screw refrigeration compressor with a slide valve assembly under part-load conditions is established based on the calculation of the effective by-pass area and radial discharge area. Experimental investigation on a screw refrigeration compressor under part-load conditions with several evaporation and condensation temperatures is also carried out. Simulation results are in good agreement with the experimental ones. With the validated model, effects of key design parameters, i.e. the installation angles of the slide valve relative to the cylinder and the slide stop length, on the working process and performance of screw refrigeration compressor have been analyzed. These results can be useful for optimum design of the slide valve assembly to improve the energy efficiency of refrigeration system with screw compressor under part-load conditions. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000351