Performance evaluation of a two-stage CO2 cycle with gas injection in the cooling mode operation
DC Field | Value | Language |
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dc.contributor.author | Cho, Honghyun | - |
dc.contributor.author | Baek, Changhyun | - |
dc.contributor.author | Park, Chasik | - |
dc.contributor.author | Kim, Yongchan | - |
dc.date.accessioned | 2021-09-08T21:12:51Z | - |
dc.date.available | 2021-09-08T21:12:51Z | - |
dc.date.created | 2021-06-10 | - |
dc.date.issued | 2009-01 | - |
dc.identifier.issn | 0140-7007 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/120861 | - |
dc.description.abstract | The cooling performance and reliability of a transcritical CO2 cycle can be significantly improved by using a multi-stage compressor with gas injection because the CO2 cycle has a large pressure difference across a compressor. The objective of this study is to investigate the performance and operating characteristics of a two-stage CO2 cycle with gas injection. in this study, the performances of a two-stage CO2 cycle with gas injection (called as "two-stage gas injection cycle") were measured as the amount of refrigerant charge, first- and second-stage compressor frequencies, and first- and second-stage EEV openings were varied in the cooling mode operation. The cooling COP of the two-stage gas injection cycle was maximally enhanced by 16.5% over that of the two-stage non-injection cycle in the experiments. In addition, when the first- and second-stage EEV openings were increased, the compression ratio decreased and this in turn, improved the cooling COP of the two-stage gas injection cycle. However, when the first-stage EEV opening was increased, the mass flow rate through the evaporator decreased, and this in turn, decreased the cooling capacity of the two-stage gas injection cycle. Therefore, in the two-stage gas injection cycle, an optimum control of both EEV openings is required. (C) 2008 Elsevier Ltd and IIR. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER SCI LTD | - |
dc.subject | CARBON-DIOXIDE CYCLE | - |
dc.subject | EXPANSION DEVICE | - |
dc.subject | HEAT-PUMP | - |
dc.subject | SYSTEM-DESIGN | - |
dc.subject | REFRIGERANT | - |
dc.title | Performance evaluation of a two-stage CO2 cycle with gas injection in the cooling mode operation | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, Yongchan | - |
dc.identifier.doi | 10.1016/j.ijrefrig.2008.07.008 | - |
dc.identifier.scopusid | 2-s2.0-56049111063 | - |
dc.identifier.wosid | 000264917500005 | - |
dc.identifier.bibliographicCitation | INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, v.32, no.1, pp.40 - 46 | - |
dc.relation.isPartOf | INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | - |
dc.citation.title | INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | - |
dc.citation.volume | 32 | - |
dc.citation.number | 1 | - |
dc.citation.startPage | 40 | - |
dc.citation.endPage | 46 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Thermodynamics | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalWebOfScienceCategory | Thermodynamics | - |
dc.relation.journalWebOfScienceCategory | Engineering, Mechanical | - |
dc.subject.keywordPlus | CARBON-DIOXIDE CYCLE | - |
dc.subject.keywordPlus | EXPANSION DEVICE | - |
dc.subject.keywordPlus | HEAT-PUMP | - |
dc.subject.keywordPlus | SYSTEM-DESIGN | - |
dc.subject.keywordPlus | REFRIGERANT | - |
dc.subject.keywordAuthor | Refrigeration system | - |
dc.subject.keywordAuthor | Compression system | - |
dc.subject.keywordAuthor | Two-stage system | - |
dc.subject.keywordAuthor | Carbon dioxide | - |
dc.subject.keywordAuthor | Transcritical system | - |
dc.subject.keywordAuthor | Injection | - |
dc.subject.keywordAuthor | Measurement | - |
dc.subject.keywordAuthor | Performance | - |
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