Partager

Technologies pour l'amélioration de la performance de systèmes de conditionnement d'air dans des régions à climat chaud.

Technologies to improve the performance of A/C systems in hot climate regions.

Numéro : pap. 2284

Auteurs : BAHMAN A., GROLL E., HORTON T., et al.

Résumé

Air conditioning contributes significantly to building energy consumption in hot climate regions. In addition to greater cooling requirements in hot climates, cooling equipment efficiency decreases with increasing outdoor temperature. Therefore, it is advantageous to develop improved technologies that can achieve higher efficiency at high ambient conditions. In this paper, two novel compression technologies are investigated for application in high ambient temperature air conditioning via numerical simulation. These technologies are liquid flooded compression with regeneration and vapor injected compression with economizing. The systems are modeled using the EES software (Klein, 2012) and compared with a baseline conventional vapor-compression cycle that utilizes R410A as the refrigerant. The cycle enhancements are considered for a number of refrigerant alternatives, including R410A, propane (R290), R32, and R1234yf. Parametric studies are conducted for air conditioning design conditions to predict the improvements in coefficient of performance (COP) for both system configurations with the various refrigerants. The simulation results show that the two novel technologies provide improvements in air conditioner performance and lower compressor discharge temperatures at high ambient temperatures. With respect to compressor discharge temperature, the vapor injection technology is superior to the oil flooding concept for the investigated working fluids. The COP comparisons indicate that oil flooding only improves the system performance when using the refrigerant R1234yf with a 14% increase in COP, whereas the vapor injection leads to significant improvements for all refrigerants with a maximum improvement of 21.5% for the refrigerant R410A.

Documents disponibles

Format PDF

Pages : 10 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

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

Détails

  • Titre original : Technologies to improve the performance of A/C systems in hot climate regions.
  • Identifiant de la fiche : 30013053
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 2014 Purdue Conferences. 15th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 14/07/2014

Liens


Voir d'autres communications du même compte rendu (203)
Voir le compte rendu de la conférence

Indexation