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Utilisation d'un éjecteur pour réduire la pression de refoulement des compresseurs dans les applications de CVC et de froid.

Utilization of ejector for decrease of compressor discharge pressure in HVAC&R applications.

Numéro : 2277

Auteurs : ALAM M., ELBEL S.

Résumé

In vapor compression refrigeration systems, two-phase refrigerant ejectors have been widely considered to increase compressor suction pressure leading to improved system performance. Nevertheless, ejectors could be utilized in an unconventional way for reducing the compressor discharge pressure and temperature. In this case, the principle of the condensing ejector could be used. The two-phase condensing ejector principle has been used a few decades ago using steam-water mainly for underwater propulsion and liquid metal MHD power generation systems. Recently, some researchers implemented this principle in the case of R22 and R-507 refrigerants. However, with the help of condensing ejector principles, there might be an opportunity to achieve a certain portion of the compression work of the system by the ejector for a wide range of operating conditions as well as different refrigerants. This paper discusses the feasibility study of this innovative utilization of two-phase ejectors considering a pertinent ejector cycle. A numerical modeling study has been performed for different refrigerants, for example, R134a, R1234yf, R1233zd(E) to explore the potential of an ejector as a way of reducing compressor outlet pressure and temperature. Preliminary modeling results from the considered ejector cycle seem to be promising and reveal that it might be possible to achieve reduced compressor discharge pressure as well as temperature in a wide range of entrainment ratios. The system, as well as the ejector performance, have also been reported for this ejector cycle.

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Pages : 10 p.

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Détails

  • Titre original : Utilization of ejector for decrease of compressor discharge pressure in HVAC&R applications.
  • Identifiant de la fiche : 30030641
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 2022

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