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Étude de la fréquence du compresseur et de la pression de refoulement optimale du système de pompe à chaleur transcritique au CO2.

A study on the compressor frequency and optimal discharge pressure of the transcritical CO2 heat pump system.

Auteurs : QIN X., LIU H., MENG X., et al.

Type d'article : Article, Article de la RIF

Résumé

This paper focuses on the influence of compressor frequency on the compressor efficiency, heating capacity, water outlet temperature and system COP. The results show that the compressor frequency mainly affects the mechanical efficiency of the compressor. The heating capacity and water outlet temperatures are affected by the CO2 mass flow rate and the water inlet temperature. The system COP has a peak value with increase of the discharge pressure and this peak is caused by the change of the enthalpy of the gas cooler outlet. In the experiment, the system's maximum water outlet temperature can rise to 80.5°C and the system COP can rise to approximately 5.1. To investigate the optimal discharge pressure, a dimensionless correlation equation is derived by analyzing the correlation and experimental data with the Buckingham PI theorem. The maximum relative error between the correlation equation and the experimental data under different working conditions is 3%.

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Format PDF

Pages : 101-113

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Détails

  • Titre original : A study on the compressor frequency and optimal discharge pressure of the transcritical CO2 heat pump system.
  • Identifiant de la fiche : 30025491
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 99
  • Date d'édition : 03/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2018.12.028

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