汽车内二氧化碳污染与通风模式

不同车速下,对四种通风模式(A关闭通风口和风扇、B关闭通风口打开风扇、C打开通风口关闭风扇、D打开通风口和风扇)车内二氧化碳浓度进行分析研究。通风口关闭的状态,无论是否打开风扇及车速快慢,车内CO2浓度严重超标。通风口打开:不开风扇,以50km/h速度行驶,车内CO2浓度高于标准限量;速度提高到80km/h,车内CO2浓度可低于标准限量,通风口和缝隙的换气可以保障车内的空气质量;而打开风扇可以有效排除车内污染物。车速提高,各种通风模式的换气量都增加,属于缝隙换气贡献的比例增加,属于风扇换气贡献的比例减小,属于通风口换气贡献比例变化不大。基于研究结果,提出了一些减少车内污染的通风方式建议。

Carbon Dioxide Pollution inside Vehicle and Ventilation Modes

Carbon dioxide concentration inside vehicle was investigated under various speeds and four ventilation modes.In closed vent sate,no matter what speeds and shut or startup fan,the concentration of carbon dioxide increases continually and is over the standard in few minutes.In open vent and shut fan,the concentration of carbon dioxide is still over standard limit at the speed of 50km/h while falls down below the limit at the speed enhanced to 80km/h,which indicate that fresh air taken in through vent and seam can control pollutants effectively when vent is opened.Ventilation quantity increased in four modes,along with vehicle run faster,and proportion of ventilation quantity rose up for the seam and reduced for fan.Some suggestions were proposed to lessen the pollution inside vehicle.