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Mesures de la fraction massique d'un mélange de CO2 et de PAG.

Oil mass fraction measurement of CO2/PAG mixture.

Auteurs : HWANG Y., RADERMACHER R., HIRATA T.

Type d'article : Article, Article de la RIF

Résumé

In this study, a method of using a capacitance sensor was investigated as a means to measure the mass fraction of a type of PAG oil flowing with CO2 in a transcritical cycle. The test facility equipped with the capacitance sensor was fabricated to establish and maintain a known oil mass fraction and to measure the capacitance of the CO2/oil mixture. By using this facility, the relationship among three parameters [reduced CO2 density (CO2 density divided by the critical density of CO2), oil mass fraction, and relative dielectric constant of the CO2/PAG oil mixture] was developed. For the range of oil mass fraction 0-0.07, the error of new measurement method was within 0.005 for a wide range of pressures and temperatures tested. This study established the method of measuring the oil mass fraction continuously in the transcritical CO2 cycle without affecting the cycle performance. Through this method, the effect of oil mass fraction on the characteristics of the oil circulation behaviour and the performance of the transcritical CO2 cycle can be investigated.

Documents disponibles

Format PDF

Pages : 256-261

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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

Détails

  • Titre original : Oil mass fraction measurement of CO2/PAG mixture.
  • Identifiant de la fiche : 2008-0571
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 31 - n. 2
  • Date d'édition : 03/2008

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