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Quelques caractéristiques de conception d'une machine de détente au CO2 à piston roulant.

Some design features of CO2 swing piston expander.

Auteurs : GUAN H. Q., MA Y. T., LI M. X.

Type d'article : Article

Résumé

CO2 is a potential substitute for synthesized refrigerants with favorable environmental properties. To improve the COP of CO2 heat pump systems, a swing piston expander prototype has been developed for replacing the throttling valve based on the thermodynamic analysis of the operating conditions of a CO2 transcritical cycle. The measures on reducing the loss of friction and leakage are paramount important to improve the efficiency of the expander. The performance of the CO2 swing expander prototype was actually tested in a CO2 transcritical cycle water-to-water heat pump test rig, and the test results illustrate that the isentropic efficiency of the prototype can be more than 28% when running steadily and up to a maximum of about 44%. Some operating characteristics of the swing piston expander are presented according to the analysis of the test results. [Reprinted with permission from Elsevier. Copyright, 2005].

Détails

  • Titre original : Some design features of CO2 swing piston expander.
  • Identifiant de la fiche : 2006-2051
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 26 - n. 2-3
  • Date d'édition : 02/2006

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