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A novel transcritical CO2 refrigeration cycle with two ejectors
Cen, Jiwen; Liu, Pei; Jiang, Fangming
2012-12-01
Source PublicationINTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
Volume35Issue:8Pages:2233-2239
Abstract

In recent years, CO2 is being revisited as a fully environmentally friendly and safe refrigerant. However, basic CO2 transcritical refrigeration cycle suffers from large expansion loss due to high pressure difference between gas cooler and evaporator. Then, it is crucial to find effective and economic way to reduce the expansion loss. Here, a novel cycle with two ejectors is proposed for the first time. Compared with conventional ejector-expansion CO2 cycle with only one ejector, this novel cycle with two ejectors is able to recover more expansion loss, thus improving the system performance further. A computational model is designed to simulate the double ejector CO2 cycle. Simulation results show its high system COP. Effects of parameters, such as ejector nozzle efficiency, gas cooler pressure, entrainment ratios of the two ejectors, gas cooler outlet temperature, on the cycle performance are also analyzed by using the computational model. (C) 2012 Elsevier Ltd and IIR. All rights reserved.

SubtypeArticle
KeywordCarbon Dioxide R744 Transcritical Cycle Ejectors Modeling Cop
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.ijrefrig.2012.07.001
WOS Subject ExtendedThermodynamics ; Engineering
WOS KeywordSYSTEM ; OPTIMIZATION ; EXPANDER
Indexed BySCI
Language英语
WOS SubjectThermodynamics ; Engineering, Mechanical
WOS IDWOS:000313145600017
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10174
Collection中国科学院广州能源研究所
AffiliationChinese Acad Sci, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Cen, Jiwen,Liu, Pei,Jiang, Fangming. A novel transcritical CO2 refrigeration cycle with two ejectors[J]. INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID,2012,35(8):2233-2239.
APA Cen, Jiwen,Liu, Pei,&Jiang, Fangming.(2012).A novel transcritical CO2 refrigeration cycle with two ejectors.INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID,35(8),2233-2239.
MLA Cen, Jiwen,et al."A novel transcritical CO2 refrigeration cycle with two ejectors".INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID 35.8(2012):2233-2239.
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