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Document IIF

L'influence de la dynamique des soupapes sur le rendement des compresseurs à piston.

Influence of valve dynamics on compressor performance.

Auteurs : BREDESEN A. M.

Type d'article : Article, Article de la RIF

Résumé

The valves of piston compressors can cause volumetric losses if they do not function properly and these losses originate from the condition where the force of valve springs differs from the optimal force which can be calculated from equations (1), (2) and (3). This problem is particularly critical with suction valves and the purpose of this report is to determine the factors which influence these losses. These determinations were realised via a series of computer simulations giving various operating conditions. The results show that the gas force A (equation (1)) and the Mach number Ma, (equation (5)) determine the level of losses for a given force difference. Fig. 4 shows the kind of volumetric losses that can be expected. The most critical conditions occurred with a Iow A value and high Mach number, hence careful attention should be given to dynamic design for such conditions. This study has revealed that unnecessary losses can be avoided if spring forces are maintained at about 50 to 150% of the optimal force of springs.

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Format PDF

Pages : 17-21

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    20 €

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    Gratuit

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Détails

  • Titre original : Influence of valve dynamics on compressor performance.
  • Identifiant de la fiche : 30000737
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 2 - n.1
  • Date d'édition : 01/1979

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