Performance improvement of the vapour compression refrigeration cycle by a two-phase constant area ejector
Küçük Resim Yok
Tarih
2009
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
WILEY
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The performance of a vapour compression system that uses an ejector as an expansion device was investigated. In the analysis, a two-phase constant area ejector flow model was used. R134a was selected as the refrigerant. According to the obtained results, for any operating temperature there are different optimum values of pressure drop in the suction chamber, ejector area ratio, ejector outlet pressure and cooling coefficient of performance (COP). As the difference between condenser and evaporator temperatures increases, the improvement ratio in COP rises whereas ejector area ratio drops. The minimum COP improvement ratio in the investigated field was 10.1%, while its maximum was 22.34%. Even in the case of an off-design operation, the performance of a system with ejector is higher than that of the basic system. Copyright (C) 2008 John Wiley & Sons, Ltd.
Açıklama
Anahtar Kelimeler
ejector, COP, expansion valve, optimum performance, off-design
Kaynak
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
33
Sayı
5