| Titre : | Ejector design and theoretical study of R134a ejector refrigeration cycle (2011) |
| Titre original : | Conception de l'éjecteur et étude théorique d'un cycle frigorifique au R134a à éjecteur |
| Auteurs : | A. Khalil, Auteur ; M. Fatouh, Auteur ; E. Elgendy, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | International journal of refrigeration (Vol. 34 N° 7, Novembre 2011) |
| Article en page(s) : | pp. 1684-1698 |
| Note générale : | Génie Mécanique |
| Langues : | Anglais |
| Index. décimale : | 621.5 (Energie pneumatique. Machinerie et outils. Réfrigération) |
| Tags : | R134a Ejector System Design Air conditioning Performance Modelling |
| Résumé : | In the present paper, a mathematical model is developed to design R134a ejector and to predict the performance characteristics of a vapor jet refrigeration system over a wide range of the investigated parameters. These parameters include boiling temperature (65–85 °C), condensing temperature (25–40 °C), evaporating temperature (0–10 °C), degrees of superheat (0–15 °C), nozzle efficiency (0.75–0.95) and diffuser efficiency (0.75–0.95). Simulated results showed that the present model data are in good agreement with experimental data in the literature with an average error of 6%. It is found that the ejector area ratio at boiling temperature of 85 °C is about double that at boiling temperature of 65 °C for various evaporating and condensing temperatures. The present results confirm that waste heat sources of temperature ranging from 65 to 85 °C are adequate to operate vapor jet refrigeration system for air-conditioning applications. |
| DEWEY : | 621.5 |
| ISSN : | 0140-7007 |
| En ligne : | http://www.sciencedirect.com/science/article/pii/S0140700711000181 |
