Optimization Analysis of CO2 Refrigeration and Heat Recovery System for Ice Rink Based on Pinch Point Theory
Against the backdrop of carbon neutralization, CO2 has attracted increasing attention as a natural working medium for refrigeration and heating applications. Based on pinch point analysis, a CO2 refrigeration and heat recovery system for an ice rink is optimized and analyzed. Under the assumption of...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Journal of Refrigeration Magazines Agency Co., Ltd.
2022-01-01
|
| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2022.06.057 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850071474389385216 |
|---|---|
| author | Zhou Xiaohu Geng Xudong Li Feng Si Chunqiang Ma Jin Shao Shuangquan |
| author_facet | Zhou Xiaohu Geng Xudong Li Feng Si Chunqiang Ma Jin Shao Shuangquan |
| author_sort | Zhou Xiaohu |
| collection | DOAJ |
| description | Against the backdrop of carbon neutralization, CO2 has attracted increasing attention as a natural working medium for refrigeration and heating applications. Based on pinch point analysis, a CO2 refrigeration and heat recovery system for an ice rink is optimized and analyzed. Under the assumption of two-stage heat recovery (water temperatures at the inlet and outlet are 40 °C and 60 °C for low-temperature heat recovery and 60 °C and 80 °C for high-temperature heat recovery), the following results were obtained by changing the water mass flow rate at a specific stage. The existence of the pinch point increased the CO2 outlet temperature for heat recovery in the heat exchanger and reduced the amount of recovered heat, heating coefficient of performance (COPh), and comprehensive COP of the system. The optimal discharge pressure corresponding to the maximum COP also moved backward until it exceeded the upper limit. When the mass flow ratio of the second stage is 0.4, the influence of the pinch point can be eliminated by adjusting the mass flow ratio of the first stage. When the mass flow ratio of the first stage is 0.4, the optimal discharge pressure increased from 10.2 to 10.9 MPa, while the maximum comprehensive COP decreased from 3.538 to 2.843. To improve the system performance, the mass flow rate of water at the second and first stages should be decreased and increased, respectively, while the discharge pressure should be increased within a reasonable range. |
| format | Article |
| id | doaj-art-3ce1475e80264b30b31eea03049f6a74 |
| institution | DOAJ |
| issn | 0253-4339 |
| language | zho |
| publishDate | 2022-01-01 |
| publisher | Journal of Refrigeration Magazines Agency Co., Ltd. |
| record_format | Article |
| series | Zhileng xuebao |
| spelling | doaj-art-3ce1475e80264b30b31eea03049f6a742025-08-20T02:47:18ZzhoJournal of Refrigeration Magazines Agency Co., Ltd.Zhileng xuebao0253-43392022-01-014366501414Optimization Analysis of CO2 Refrigeration and Heat Recovery System for Ice Rink Based on Pinch Point TheoryZhou XiaohuGeng XudongLi FengSi ChunqiangMa JinShao ShuangquanAgainst the backdrop of carbon neutralization, CO2 has attracted increasing attention as a natural working medium for refrigeration and heating applications. Based on pinch point analysis, a CO2 refrigeration and heat recovery system for an ice rink is optimized and analyzed. Under the assumption of two-stage heat recovery (water temperatures at the inlet and outlet are 40 °C and 60 °C for low-temperature heat recovery and 60 °C and 80 °C for high-temperature heat recovery), the following results were obtained by changing the water mass flow rate at a specific stage. The existence of the pinch point increased the CO2 outlet temperature for heat recovery in the heat exchanger and reduced the amount of recovered heat, heating coefficient of performance (COPh), and comprehensive COP of the system. The optimal discharge pressure corresponding to the maximum COP also moved backward until it exceeded the upper limit. When the mass flow ratio of the second stage is 0.4, the influence of the pinch point can be eliminated by adjusting the mass flow ratio of the first stage. When the mass flow ratio of the first stage is 0.4, the optimal discharge pressure increased from 10.2 to 10.9 MPa, while the maximum comprehensive COP decreased from 3.538 to 2.843. To improve the system performance, the mass flow rate of water at the second and first stages should be decreased and increased, respectively, while the discharge pressure should be increased within a reasonable range.http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2022.06.057ice rinkrefrigeration and heat recovery systempinch point analysisCO2coefficient of performance |
| spellingShingle | Zhou Xiaohu Geng Xudong Li Feng Si Chunqiang Ma Jin Shao Shuangquan Optimization Analysis of CO2 Refrigeration and Heat Recovery System for Ice Rink Based on Pinch Point Theory Zhileng xuebao ice rink refrigeration and heat recovery system pinch point analysis CO2 coefficient of performance |
| title | Optimization Analysis of CO2 Refrigeration and Heat Recovery System for Ice Rink Based on Pinch Point Theory |
| title_full | Optimization Analysis of CO2 Refrigeration and Heat Recovery System for Ice Rink Based on Pinch Point Theory |
| title_fullStr | Optimization Analysis of CO2 Refrigeration and Heat Recovery System for Ice Rink Based on Pinch Point Theory |
| title_full_unstemmed | Optimization Analysis of CO2 Refrigeration and Heat Recovery System for Ice Rink Based on Pinch Point Theory |
| title_short | Optimization Analysis of CO2 Refrigeration and Heat Recovery System for Ice Rink Based on Pinch Point Theory |
| title_sort | optimization analysis of co2 refrigeration and heat recovery system for ice rink based on pinch point theory |
| topic | ice rink refrigeration and heat recovery system pinch point analysis CO2 coefficient of performance |
| url | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2022.06.057 |
| work_keys_str_mv | AT zhouxiaohu optimizationanalysisofco2refrigerationandheatrecoverysystemforicerinkbasedonpinchpointtheory AT gengxudong optimizationanalysisofco2refrigerationandheatrecoverysystemforicerinkbasedonpinchpointtheory AT lifeng optimizationanalysisofco2refrigerationandheatrecoverysystemforicerinkbasedonpinchpointtheory AT sichunqiang optimizationanalysisofco2refrigerationandheatrecoverysystemforicerinkbasedonpinchpointtheory AT majin optimizationanalysisofco2refrigerationandheatrecoverysystemforicerinkbasedonpinchpointtheory AT shaoshuangquan optimizationanalysisofco2refrigerationandheatrecoverysystemforicerinkbasedonpinchpointtheory |