Experimental Study on Outdoor Heat Exchanger Frosting Characteristics of a Heat Pump Air-conditioning System for Electric Vehicles
Exterior heat exchangers of heat pumps in electric vehicles are prone to frost when operated in winter. This project experimentally investigated this phenomenon. A relationship between frost growth and reductions in the surface temperature of the external heat exchanger was demonstrated. Furthermore...
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| Format: | Article |
| Language: | zho |
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Journal of Refrigeration Magazines Agency Co., Ltd.
2020-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2020.03.058 |
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| author | Bao Jiaqian Su Lin Liu Mingkang Fang Yidong Li Kang |
| author_facet | Bao Jiaqian Su Lin Liu Mingkang Fang Yidong Li Kang |
| author_sort | Bao Jiaqian |
| collection | DOAJ |
| description | Exterior heat exchangers of heat pumps in electric vehicles are prone to frost when operated in winter. This project experimentally investigated this phenomenon. A relationship between frost growth and reductions in the surface temperature of the external heat exchanger was demonstrated. Furthermore, the distribution of frost on each flow channel was uneven, reflecting the different refrigerant densities of gaseous and liquid phases within the channel and the influence of gravity, which leads to a separation and uneven distribution of the two-phase refrigerant in the flow channel. In addition, the increase of frost on the exterior heat exchanger will result in decreased refrigerant temperature within the exterior heat exchanger, and decreased suction and discharge pressures of the compressor and heating capacity, while causing an increased unit power consumption of the compressor. With an ambient temperature of 0 °C, when the rate of frost coverage reaches 77.4%, the reduction of suction pressure, discharge pressure, and heating capacity were 33.4%, 12.1%, and 25.8%, respectively. Further, the increase of unit power consumption was 32.0%, which reduced the stability of operation and led to an unacceptable level of heating. |
| format | Article |
| id | doaj-art-57131ad1d6eb44d3be3122f9782deb45 |
| institution | DOAJ |
| issn | 0253-4339 |
| language | zho |
| publishDate | 2020-01-01 |
| publisher | Journal of Refrigeration Magazines Agency Co., Ltd. |
| record_format | Article |
| series | Zhileng xuebao |
| spelling | doaj-art-57131ad1d6eb44d3be3122f9782deb452025-08-20T02:47:13ZzhoJournal of Refrigeration Magazines Agency Co., Ltd.Zhileng xuebao0253-43392020-01-014166507125Experimental Study on Outdoor Heat Exchanger Frosting Characteristics of a Heat Pump Air-conditioning System for Electric VehiclesBao JiaqianSu LinLiu MingkangFang YidongLi KangExterior heat exchangers of heat pumps in electric vehicles are prone to frost when operated in winter. This project experimentally investigated this phenomenon. A relationship between frost growth and reductions in the surface temperature of the external heat exchanger was demonstrated. Furthermore, the distribution of frost on each flow channel was uneven, reflecting the different refrigerant densities of gaseous and liquid phases within the channel and the influence of gravity, which leads to a separation and uneven distribution of the two-phase refrigerant in the flow channel. In addition, the increase of frost on the exterior heat exchanger will result in decreased refrigerant temperature within the exterior heat exchanger, and decreased suction and discharge pressures of the compressor and heating capacity, while causing an increased unit power consumption of the compressor. With an ambient temperature of 0 °C, when the rate of frost coverage reaches 77.4%, the reduction of suction pressure, discharge pressure, and heating capacity were 33.4%, 12.1%, and 25.8%, respectively. Further, the increase of unit power consumption was 32.0%, which reduced the stability of operation and led to an unacceptable level of heating.http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2020.03.058automotive air-conditioningheat pumpfrosting characteristicsmicrochannel heat exchanger |
| spellingShingle | Bao Jiaqian Su Lin Liu Mingkang Fang Yidong Li Kang Experimental Study on Outdoor Heat Exchanger Frosting Characteristics of a Heat Pump Air-conditioning System for Electric Vehicles Zhileng xuebao automotive air-conditioning heat pump frosting characteristics microchannel heat exchanger |
| title | Experimental Study on Outdoor Heat Exchanger Frosting Characteristics of a Heat Pump Air-conditioning System for Electric Vehicles |
| title_full | Experimental Study on Outdoor Heat Exchanger Frosting Characteristics of a Heat Pump Air-conditioning System for Electric Vehicles |
| title_fullStr | Experimental Study on Outdoor Heat Exchanger Frosting Characteristics of a Heat Pump Air-conditioning System for Electric Vehicles |
| title_full_unstemmed | Experimental Study on Outdoor Heat Exchanger Frosting Characteristics of a Heat Pump Air-conditioning System for Electric Vehicles |
| title_short | Experimental Study on Outdoor Heat Exchanger Frosting Characteristics of a Heat Pump Air-conditioning System for Electric Vehicles |
| title_sort | experimental study on outdoor heat exchanger frosting characteristics of a heat pump air conditioning system for electric vehicles |
| topic | automotive air-conditioning heat pump frosting characteristics microchannel heat exchanger |
| url | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2020.03.058 |
| work_keys_str_mv | AT baojiaqian experimentalstudyonoutdoorheatexchangerfrostingcharacteristicsofaheatpumpairconditioningsystemforelectricvehicles AT sulin experimentalstudyonoutdoorheatexchangerfrostingcharacteristicsofaheatpumpairconditioningsystemforelectricvehicles AT liumingkang experimentalstudyonoutdoorheatexchangerfrostingcharacteristicsofaheatpumpairconditioningsystemforelectricvehicles AT fangyidong experimentalstudyonoutdoorheatexchangerfrostingcharacteristicsofaheatpumpairconditioningsystemforelectricvehicles AT likang experimentalstudyonoutdoorheatexchangerfrostingcharacteristicsofaheatpumpairconditioningsystemforelectricvehicles |