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Estimation de la performance de cycles à éjecteur utilisant comme frigorigène des hydrocarbures plus lourds.

Performance estimation of ejector cycles using heavier hydrocarbon refrigerants.

Auteurs : KASPERSKI J., GIL B.

Type d'article : Article

Résumé

Computer software basing on theoretical model of Huang et al. with thermodynamic properties of hydrocarbons was prepared. Investigation was focused on nine hydrocarbons: propane, butane, iso-butane, pentane, iso-pentane, hexane, heptane and octane. A series of calculations was carried out for the generator temperature between 70 and 200 °C, with assumed temperatures of evaporation 10 °C and condensation 40 °C. Calculation results show that none of the hydrocarbons enables high efficiency of a cycle in a wide range of temperature. Each hydrocarbon has its own maximal entrainment ratio at its individual temperature of optimum. Temperatures of entrainment ratios optimum increase according to the hydrocarbon heaviness with simultaneous increase of entrainment ratio peak values. Peak values of the COP do not increase according to the hydrocarbons heaviness. The highest COP =0.32 is achieved for iso-butane at 102 °C and the COP = 0.28 for pentane at 165 °C. Heptane and octane can be ignored.

Détails

  • Titre original : Performance estimation of ejector cycles using heavier hydrocarbon refrigerants.
  • Identifiant de la fiche : 30013874
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 71 - n. 1
  • Date d'édition : 10/2014
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2014.06.057

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