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
主观评价和客观测试是研究环境热舒适性的主要方法,一般的客观测试是通过布置测点测试室内热环境参数计算预计平均热感觉指数(PMV——Predicted Mean Vote),室内热环境的非稳态影响因素使得该方法很难综合描述并准确预测非稳态热环境下...主观评价和客观测试是研究环境热舒适性的主要方法,一般的客观测试是通过布置测点测试室内热环境参数计算预计平均热感觉指数(PMV——Predicted Mean Vote),室内热环境的非稳态影响因素使得该方法很难综合描述并准确预测非稳态热环境下人的热舒适程度。本文通过中国成年人体数据库获取我国人群的体貌及生理特征,选取50百分位成年男性人体三维数据建立暖体假人模型,根据舒适状态下的人体热平衡方程制定控制策略,开发了一套可用于测试非稳态、非均匀热环境下人体与环境之间热量交换的暖体假人测试系统,在人工环境实验室营造特定的热湿环境,利用暖体假人测试系统测试了当前环境的预计平均热感觉指数(PMV)为-0.8,并对该环境进行被试者主观评价测试,得到热感觉投票值(TSV——Thermal Sensation Vote)为-0.65,被试者主观体验结果与暖体假人客观测试结果的相对误差仅为2.1%。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.
文摘主观评价和客观测试是研究环境热舒适性的主要方法,一般的客观测试是通过布置测点测试室内热环境参数计算预计平均热感觉指数(PMV——Predicted Mean Vote),室内热环境的非稳态影响因素使得该方法很难综合描述并准确预测非稳态热环境下人的热舒适程度。本文通过中国成年人体数据库获取我国人群的体貌及生理特征,选取50百分位成年男性人体三维数据建立暖体假人模型,根据舒适状态下的人体热平衡方程制定控制策略,开发了一套可用于测试非稳态、非均匀热环境下人体与环境之间热量交换的暖体假人测试系统,在人工环境实验室营造特定的热湿环境,利用暖体假人测试系统测试了当前环境的预计平均热感觉指数(PMV)为-0.8,并对该环境进行被试者主观评价测试,得到热感觉投票值(TSV——Thermal Sensation Vote)为-0.65,被试者主观体验结果与暖体假人客观测试结果的相对误差仅为2.1%。
