Influencing assessment of different heating modes on thermal comfort in electric vehicle cabin
Electric vehicle (EV) is more environmental-friendly than gasoline vehicle because the main power is not petrol. For the heating system, the waste heat generated by engines is recycled to heat the cabin of gasoline ones, while the EV need extra electric energy consumption for heating the cabin which...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2024-08-01
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| Series: | Energy and Built Environment |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666123323000193 |
| _version_ | 1797356913651875840 |
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| author | Jingjing Wu Jianlin Liu Jingde Zhao Yun Su |
| author_facet | Jingjing Wu Jianlin Liu Jingde Zhao Yun Su |
| author_sort | Jingjing Wu |
| collection | DOAJ |
| description | Electric vehicle (EV) is more environmental-friendly than gasoline vehicle because the main power is not petrol. For the heating system, the waste heat generated by engines is recycled to heat the cabin of gasoline ones, while the EV need extra electric energy consumption for heating the cabin which decreases the driving range. Personal comfort system (PCS) has been reported that it is an alternative technique to improve occupant thermal comfort and indirectly save building heating energy. This study aims to investigate the occupants’ thermal sensation under four heating modes in the EV cabin in winter, including no heating, only PCS, only air conditioning, and both air conditioning and PCS. The field survey is conducted in a parked EV with 12 subjects. Three thermal comfort indexes (PMV, SET*, and operative temperature Top) are used and assessed for their applicability in the thermal environment of the EV. Results show that the thermal environment in the cabin is non-uniform and dynamic with the air conditioning mode, while the PCS mode just slightly affects the temperature differences inside. Meanwhile, the subjects’ thermal sensations cannot maintain neutral or warmer under the PCS mode only. The results of PMV are lower than the subjects’ actual thermal sensation votes (TSV), while the results of SET* and Top show significant linear relationships with the TSV for the correlation coefficients above 0.80. Compare to the air conditioning mode, the neutral SET* and neutral Top are decreased by 2.7 °C and 1.6 °C under the mode with PCS and air conditioning, respectively. The findings indicate that PCS not only has a positive effect on improving the cabin environment and occupant's thermal sensation but also has the potential to lower the setting temperature of air conditioner of EVs in winter. |
| first_indexed | 2024-03-08T14:35:40Z |
| format | Article |
| id | doaj.art-dedf227c7d454003802ac7a0e42f93e4 |
| institution | Directory Open Access Journal |
| issn | 2666-1233 |
| language | English |
| last_indexed | 2024-03-08T14:35:40Z |
| publishDate | 2024-08-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Energy and Built Environment |
| spelling | doaj.art-dedf227c7d454003802ac7a0e42f93e42024-01-12T04:57:35ZengKeAi Communications Co., Ltd.Energy and Built Environment2666-12332024-08-0154556567Influencing assessment of different heating modes on thermal comfort in electric vehicle cabinJingjing Wu0Jianlin Liu1Jingde Zhao2Yun Su3College of Environmental Science and Engineering, Donghua University, Shanghai, ChinaCollege of Environmental Science and Engineering, Donghua University, Shanghai, China; Corresponding author.College of Environmental Science and Engineering, Donghua University, Shanghai, ChinaCollege of Fashion and Design, Donghua University, Shanghai, ChinaElectric vehicle (EV) is more environmental-friendly than gasoline vehicle because the main power is not petrol. For the heating system, the waste heat generated by engines is recycled to heat the cabin of gasoline ones, while the EV need extra electric energy consumption for heating the cabin which decreases the driving range. Personal comfort system (PCS) has been reported that it is an alternative technique to improve occupant thermal comfort and indirectly save building heating energy. This study aims to investigate the occupants’ thermal sensation under four heating modes in the EV cabin in winter, including no heating, only PCS, only air conditioning, and both air conditioning and PCS. The field survey is conducted in a parked EV with 12 subjects. Three thermal comfort indexes (PMV, SET*, and operative temperature Top) are used and assessed for their applicability in the thermal environment of the EV. Results show that the thermal environment in the cabin is non-uniform and dynamic with the air conditioning mode, while the PCS mode just slightly affects the temperature differences inside. Meanwhile, the subjects’ thermal sensations cannot maintain neutral or warmer under the PCS mode only. The results of PMV are lower than the subjects’ actual thermal sensation votes (TSV), while the results of SET* and Top show significant linear relationships with the TSV for the correlation coefficients above 0.80. Compare to the air conditioning mode, the neutral SET* and neutral Top are decreased by 2.7 °C and 1.6 °C under the mode with PCS and air conditioning, respectively. The findings indicate that PCS not only has a positive effect on improving the cabin environment and occupant's thermal sensation but also has the potential to lower the setting temperature of air conditioner of EVs in winter.http://www.sciencedirect.com/science/article/pii/S2666123323000193Electric vehiclePersonal comfort system (PCS)Thermal sensation votes (TSV)Standard effective temperature (SET*) |
| spellingShingle | Jingjing Wu Jianlin Liu Jingde Zhao Yun Su Influencing assessment of different heating modes on thermal comfort in electric vehicle cabin Energy and Built Environment Electric vehicle Personal comfort system (PCS) Thermal sensation votes (TSV) Standard effective temperature (SET*) |
| title | Influencing assessment of different heating modes on thermal comfort in electric vehicle cabin |
| title_full | Influencing assessment of different heating modes on thermal comfort in electric vehicle cabin |
| title_fullStr | Influencing assessment of different heating modes on thermal comfort in electric vehicle cabin |
| title_full_unstemmed | Influencing assessment of different heating modes on thermal comfort in electric vehicle cabin |
| title_short | Influencing assessment of different heating modes on thermal comfort in electric vehicle cabin |
| title_sort | influencing assessment of different heating modes on thermal comfort in electric vehicle cabin |
| topic | Electric vehicle Personal comfort system (PCS) Thermal sensation votes (TSV) Standard effective temperature (SET*) |
| url | http://www.sciencedirect.com/science/article/pii/S2666123323000193 |
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