Effect of Vapor-injection Mass on System Performance of Air-source Heat Pump with Enhanced Vapor Injection
Air-source heat pumps suffer from many problems such as high pressure ratio, high discharge temperature, and poor performance at low temperature. The enhanced vapor injection (EVI) technology can improve the performance of an air-source heat pump at low temperature. This study sets up a numerical si...
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| Format: | Article |
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Journal of Refrigeration Magazines Agency Co., Ltd.
2019-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2019.04.037 |
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| _version_ | 1850027238864453632 |
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| author | Ran Xiaopeng Zhai Xiaoqiang Luo Qiong |
| author_facet | Ran Xiaopeng Zhai Xiaoqiang Luo Qiong |
| author_sort | Ran Xiaopeng |
| collection | DOAJ |
| description | Air-source heat pumps suffer from many problems such as high pressure ratio, high discharge temperature, and poor performance at low temperature. The enhanced vapor injection (EVI) technology can improve the performance of an air-source heat pump at low temperature. This study sets up a numerical simulation model of an air-source heat pump system to investigate with the effect of EVI. A test bed is designed to verify the simulation model. The performance of the air-source heat pump with EVI is simulated based on the model. The results demonstrate that an optimal relative vapor-injection mass exists that achieves the highest system energy efficiency. The best range of relative vapor-injection mass is 8%–10% for the best heating performance when the environment temperature is lower than ?6 ℃. The best range of relative vapor-injection mass is 5%–8% when the environment temperature is from ?6 to 0 ℃. The best range of relative vapor-injection mass is 4%–5% when the environment temperature is higher than 0 ℃. The corresponding optimal relative vapor-injection pressure is between 0.7 and 0.9. The heating capacity increases by 33%, and the coefficient of performance increases by 31% under optimal air-injection parameters. |
| format | Article |
| id | doaj-art-909a340f1f0c4faebb4e5381f378ae24 |
| institution | DOAJ |
| issn | 0253-4339 |
| language | zho |
| publishDate | 2019-01-01 |
| publisher | Journal of Refrigeration Magazines Agency Co., Ltd. |
| record_format | Article |
| series | Zhileng xuebao |
| spelling | doaj-art-909a340f1f0c4faebb4e5381f378ae242025-08-20T03:00:16ZzhoJournal of Refrigeration Magazines Agency Co., Ltd.Zhileng xuebao0253-43392019-01-014066509097Effect of Vapor-injection Mass on System Performance of Air-source Heat Pump with Enhanced Vapor InjectionRan XiaopengZhai XiaoqiangLuo QiongAir-source heat pumps suffer from many problems such as high pressure ratio, high discharge temperature, and poor performance at low temperature. The enhanced vapor injection (EVI) technology can improve the performance of an air-source heat pump at low temperature. This study sets up a numerical simulation model of an air-source heat pump system to investigate with the effect of EVI. A test bed is designed to verify the simulation model. The performance of the air-source heat pump with EVI is simulated based on the model. The results demonstrate that an optimal relative vapor-injection mass exists that achieves the highest system energy efficiency. The best range of relative vapor-injection mass is 8%–10% for the best heating performance when the environment temperature is lower than ?6 ℃. The best range of relative vapor-injection mass is 5%–8% when the environment temperature is from ?6 to 0 ℃. The best range of relative vapor-injection mass is 4%–5% when the environment temperature is higher than 0 ℃. The corresponding optimal relative vapor-injection pressure is between 0.7 and 0.9. The heating capacity increases by 33%, and the coefficient of performance increases by 31% under optimal air-injection parameters.http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2019.04.037air-source heat pumpenhanced vapor injection(EVI)vapor injection massnumerical simulation |
| spellingShingle | Ran Xiaopeng Zhai Xiaoqiang Luo Qiong Effect of Vapor-injection Mass on System Performance of Air-source Heat Pump with Enhanced Vapor Injection Zhileng xuebao air-source heat pump enhanced vapor injection(EVI) vapor injection mass numerical simulation |
| title | Effect of Vapor-injection Mass on System Performance of Air-source Heat Pump with Enhanced Vapor Injection |
| title_full | Effect of Vapor-injection Mass on System Performance of Air-source Heat Pump with Enhanced Vapor Injection |
| title_fullStr | Effect of Vapor-injection Mass on System Performance of Air-source Heat Pump with Enhanced Vapor Injection |
| title_full_unstemmed | Effect of Vapor-injection Mass on System Performance of Air-source Heat Pump with Enhanced Vapor Injection |
| title_short | Effect of Vapor-injection Mass on System Performance of Air-source Heat Pump with Enhanced Vapor Injection |
| title_sort | effect of vapor injection mass on system performance of air source heat pump with enhanced vapor injection |
| topic | air-source heat pump enhanced vapor injection(EVI) vapor injection mass numerical simulation |
| url | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2019.04.037 |
| work_keys_str_mv | AT ranxiaopeng effectofvaporinjectionmassonsystemperformanceofairsourceheatpumpwithenhancedvaporinjection AT zhaixiaoqiang effectofvaporinjectionmassonsystemperformanceofairsourceheatpumpwithenhancedvaporinjection AT luoqiong effectofvaporinjectionmassonsystemperformanceofairsourceheatpumpwithenhancedvaporinjection |