Development of a CFD model for simulating vehicle cabin indoor air quality
Development of a CFD model for simulating vehicle cabin indoor air quality
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DOI：
10.1016/j.trd.2018.03.018
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发表时间：
2018-07-01
影响因子：
7.6
通讯作者：
Chang, Che-Cheng
中科院分区：
文献类型：
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作者：
Chang, Tong-Bou;Sheu, Jer-Jia;Chang, Che-Cheng
随着车厢内CO2水平的增加，由于驾驶员困倦和反应减慢而导致的事故风险也会增加。因此，在这项研究中，开发了一个CFD模拟模型，以探讨室外空气通风量对车内室内空气品质和每个人在车内所需的室外空气量的影响。结果表明，使用ASHRAE标准62.1的室外空气供应率建议（即每人2.5 l/s），机舱内的平均CO2浓度约为2850 ppm。结果还表明，使用每人4.01/s的室外空气供应率建议以改善人类健康，相应的舱内平均CO2浓度约为1810 ppm。此外，本研究发现，每位乘客9.21/s的室外新鲜空气流速足以将机舱内的二氧化碳浓度降低到1000 ppm的安全值。此外，每名乘客3.61/s的室外新鲜空气流速导致二氧化碳浓度约为2000 ppm。
As the level of CO2 within the vehicle cabin increases, the risk of accidents as a result of driver drowsiness and a slowing of the reactions also increases. Accordingly, a CFD simulation model was developed in this study to explore the effects of outdoor air ventilation rate on vehicle cabin indoor air quality and the amount of outdoor air required for each person in a vehicle. The results show that using the outdoor air supply rate recommendations of ASHRAE Standard 62.1 (i.e. 2.5 1/s per person) the mean CO2 concentrations in the cabin are around 2850 ppm. The results also show that using the outdoor air supply rate recommendations of 4.01/s per person for improved human wellbeing, the corresponding mean CO2 concentrations in the cabin are around 1810 ppm. Moreover, the present study found that an outdoor fresh air flow rate of 9.21/s per passenger was sufficient to reduce the carbon dioxide concentration within the cabin to a safe value of 1000 ppm. Furthermore, an outdoor fresh air flow rate of 3.61/s per passenger resulted in a carbon dioxide concentration of around 2000 ppm.