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Analyse des performances et optimisation d'un compresseur à piston avec système de régulation progressive de la puissance dans des conditions de charge variables.

Performance analysis and optimization of reciprocating compressor with stepless capacity control system under variable load conditions.

Auteurs : WANG Y., JIANG Z., ZHANG J., et al.

Type d'article : Article, Article de la RIF

Résumé

The stepless capacity control system uses mechanical unloaders to press off suction valves during a partial stroke, so that the quantity of gas that is compressed matches the cooling load of the refrigeration and air-conditioning systems. In this paper, an improved numerical model is developed for a reciprocating compressor under stepless capacity regulation to analyze the influence of critical parameters, including hydraulic force, displacement, and velocity of the unloader. The dynamic pressure of the gas in the cylinder is investigated under the influence of different parameters. The results show that the lowest power requirement for the same performance is achieved with a 360?N force of the unloader, indicating that it is the optimal force. Moreover, the displacement of 1.75?mm is preferable than that of 2?mm, and the withdrawal velocity of the unloader must be limited below 1.1?m s-1 to avoid large impact stress of valve plate.

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Format PDF

Pages : 174-185

Disponible

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    20 €

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    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Performance analysis and optimization of reciprocating compressor with stepless capacity control system under variable load conditions.
  • Identifiant de la fiche : 30025097
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 94
  • Date d'édition : 10/2018
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2018.07.013

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