Performance improvement of the vapour compression refrigeration cycle by a two-phase constant area ejector

Küçük Resim Yok

Tarih

2009

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

Künye