Theoretical Performance Analysis of CO2 Transcritical Refrigeration Cycle with Mechanical Subcooling
The performance of the CO2 transcritical refrigeration cycle can be improved, and the throttling irreversibility loss can be reduced, by subcooling CO2 at the outlet of the gas cooler with a vapor compression refrigeration cycle (auxiliary cycle). A thermodynamical analysis is performed to study the...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Journal of Refrigeration Magazines Agency Co., Ltd.
2018-01-01
|
| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2018.01.013 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849705158488883200 |
|---|---|
| author | Dai Baomin Liu Shengchun Sun Zhili Qi Haifeng Chen Qi Wang Xiaoming Ma Yitai |
| author_facet | Dai Baomin Liu Shengchun Sun Zhili Qi Haifeng Chen Qi Wang Xiaoming Ma Yitai |
| author_sort | Dai Baomin |
| collection | DOAJ |
| description | The performance of the CO2 transcritical refrigeration cycle can be improved, and the throttling irreversibility loss can be reduced, by subcooling CO2 at the outlet of the gas cooler with a vapor compression refrigeration cycle (auxiliary cycle). A thermodynamical analysis is performed to study the operation characteristics of the CO2 transcritical refrigeration cycle with mechanical subcooling, and the results indicate that the maximum coefficient of performance (COP) is achieved at the optimum discharge pressure and optimum subcooling temperature. Compared with the traditional CO2 transcritical cycle, the improvement in COP is more significant at higher ambient temperatures and lower evaporation temperatures, and the discharge pressure and temperature can be notably reduced by the auxiliary cycle. The energy consumption of the auxiliary cycle compressor is much lower than that of the CO2 compressor. Among the 11 auxiliary cycle refrigerants, the differences between the COP improvements of the other 10 auxiliary working fluids are not obvious, except for R41. The CO2 transcritical cascade refrigeration cycle is more applicable to working conditions with higher ambient temperatures and lower evaporation temperatures. |
| format | Article |
| id | doaj-art-546e715bc8ff4cdaa5e02b6812e30b3c |
| institution | DOAJ |
| issn | 0253-4339 |
| language | zho |
| publishDate | 2018-01-01 |
| publisher | Journal of Refrigeration Magazines Agency Co., Ltd. |
| record_format | Article |
| series | Zhileng xuebao |
| spelling | doaj-art-546e715bc8ff4cdaa5e02b6812e30b3c2025-08-20T03:16:32ZzhoJournal of Refrigeration Magazines Agency Co., Ltd.Zhileng xuebao0253-43392018-01-013966510024Theoretical Performance Analysis of CO2 Transcritical Refrigeration Cycle with Mechanical SubcoolingDai BaominLiu ShengchunSun ZhiliQi HaifengChen QiWang XiaomingMa YitaiThe performance of the CO2 transcritical refrigeration cycle can be improved, and the throttling irreversibility loss can be reduced, by subcooling CO2 at the outlet of the gas cooler with a vapor compression refrigeration cycle (auxiliary cycle). A thermodynamical analysis is performed to study the operation characteristics of the CO2 transcritical refrigeration cycle with mechanical subcooling, and the results indicate that the maximum coefficient of performance (COP) is achieved at the optimum discharge pressure and optimum subcooling temperature. Compared with the traditional CO2 transcritical cycle, the improvement in COP is more significant at higher ambient temperatures and lower evaporation temperatures, and the discharge pressure and temperature can be notably reduced by the auxiliary cycle. The energy consumption of the auxiliary cycle compressor is much lower than that of the CO2 compressor. Among the 11 auxiliary cycle refrigerants, the differences between the COP improvements of the other 10 auxiliary working fluids are not obvious, except for R41. The CO2 transcritical cascade refrigeration cycle is more applicable to working conditions with higher ambient temperatures and lower evaporation temperatures.http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2018.01.013CO2transcriticalmechanical subcoolingrefrigeration cycle |
| spellingShingle | Dai Baomin Liu Shengchun Sun Zhili Qi Haifeng Chen Qi Wang Xiaoming Ma Yitai Theoretical Performance Analysis of CO2 Transcritical Refrigeration Cycle with Mechanical Subcooling Zhileng xuebao CO2 transcritical mechanical subcooling refrigeration cycle |
| title | Theoretical Performance Analysis of CO2 Transcritical Refrigeration Cycle with Mechanical Subcooling |
| title_full | Theoretical Performance Analysis of CO2 Transcritical Refrigeration Cycle with Mechanical Subcooling |
| title_fullStr | Theoretical Performance Analysis of CO2 Transcritical Refrigeration Cycle with Mechanical Subcooling |
| title_full_unstemmed | Theoretical Performance Analysis of CO2 Transcritical Refrigeration Cycle with Mechanical Subcooling |
| title_short | Theoretical Performance Analysis of CO2 Transcritical Refrigeration Cycle with Mechanical Subcooling |
| title_sort | theoretical performance analysis of co2 transcritical refrigeration cycle with mechanical subcooling |
| topic | CO2 transcritical mechanical subcooling refrigeration cycle |
| url | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2018.01.013 |
| work_keys_str_mv | AT daibaomin theoreticalperformanceanalysisofco2transcriticalrefrigerationcyclewithmechanicalsubcooling AT liushengchun theoreticalperformanceanalysisofco2transcriticalrefrigerationcyclewithmechanicalsubcooling AT sunzhili theoreticalperformanceanalysisofco2transcriticalrefrigerationcyclewithmechanicalsubcooling AT qihaifeng theoreticalperformanceanalysisofco2transcriticalrefrigerationcyclewithmechanicalsubcooling AT chenqi theoreticalperformanceanalysisofco2transcriticalrefrigerationcyclewithmechanicalsubcooling AT wangxiaoming theoreticalperformanceanalysisofco2transcriticalrefrigerationcyclewithmechanicalsubcooling AT mayitai theoreticalperformanceanalysisofco2transcriticalrefrigerationcyclewithmechanicalsubcooling |