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,w...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℃ and 1.6℃ 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.展开更多
选取寒冷地区中小型高铁站,采用问卷调查与物理测试结合的方法,研究寒冷地区高铁站候车厅中旅客的热舒适度,得出旅客的中性温度与舒适温度阈值,并进而代入能耗模拟,探究热舒适与建筑能耗耦合作用下的高铁站房夏季节能潜力。研究结果表明...选取寒冷地区中小型高铁站,采用问卷调查与物理测试结合的方法,研究寒冷地区高铁站候车厅中旅客的热舒适度,得出旅客的中性温度与舒适温度阈值,并进而代入能耗模拟,探究热舒适与建筑能耗耦合作用下的高铁站房夏季节能潜力。研究结果表明,对于夏季高铁站候车厅,旅客中性温度为25.92℃,热舒适区间为22.03~28.43℃。通过中性温度及热舒适区间设置优化,其能降低约5%~11%的制冷能耗;而舒适区间范围内的能耗波动幅度为92 107 k W·h,约占制冷能耗的24.32%,节能效果可观。展开更多
基金supported by the Fundamental Research Funds for the Central University of Donghua Universitythe National Natural Science Foundation of China (Grant No.52008079,52278094).
文摘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℃ and 1.6℃ 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.
文摘选取寒冷地区中小型高铁站,采用问卷调查与物理测试结合的方法,研究寒冷地区高铁站候车厅中旅客的热舒适度,得出旅客的中性温度与舒适温度阈值,并进而代入能耗模拟,探究热舒适与建筑能耗耦合作用下的高铁站房夏季节能潜力。研究结果表明,对于夏季高铁站候车厅,旅客中性温度为25.92℃,热舒适区间为22.03~28.43℃。通过中性温度及热舒适区间设置优化,其能降低约5%~11%的制冷能耗;而舒适区间范围内的能耗波动幅度为92 107 k W·h,约占制冷能耗的24.32%,节能效果可观。