Experimental study and numerical simulation Concerning fogging characteristics and Improvement of return air utilization for electric vehicles
Experimental study and numerical simulation Concerning fogging characteristics and Improvement of return air utilization for electric vehicles
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电动汽车起雾特性及回风利用率提高的实验研究与数值模拟
DOI：
10.1016/j.applthermaleng.2017.10.060
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发表时间：
2018-01
影响因子：
6.4
通讯作者：
Tian Changqing
中科院分区：
文献类型：
--
作者：
Liu Jixuan;Zou Huiming;Zhang Guiying;Zhang Xiaoqiang;Tang Junyan;Tian Changqing
防雾处理是与电动汽车热管理相关的一项关键任务，其重点是利用车厢回风来减少热负荷并节省电池电量。本研究采用改进的热湿模型（T&H模型）对车辆内部气候特征进行分析，该模型考虑了挡风玻璃与内部空气之间的薄空气层，从而提高了模型的准确性。搭建了试验台架，研究了不同环境条件下挡风玻璃的起雾特性，在此基础上实验测量了与挡风玻璃表面温度相关的两个相关因素，即表面空气层临界含水率（CMC）与相应的饱和含水率（SMC）之差，以及风速对对流换热系数的影响。这里获得的结果被用来改进T&H模型，然后通过额外的实验测试验证该模型，显示误差低于10%。最后，通过数值模拟对最大回风比进行了分析，结果表明，随着行驶速度的提高，对流换热系数的增大导致挡风玻璃温度降低，从而导致回风比下降。随着外部空气相对湿度的增加，回风比对驱动速度的依赖性变得更加明显。
Anti-fogging treatment is a key task associated with the thermal management of electric vehicles, which focuses on utilizing the cabin return air to reduce heating load and save battery power. The present study analyzes the interior climate characteristics of the vehicle with an improved thermal and humidity model (T&H model), which considers a thin air layer between the windshield and the interior air so as to enhance the accuracy of the model. A test bench is constructed to investigate the fogging characteristics of the windshield under various environmental conditions, based on which two relevant factors are experimentally measured, i.e., the difference between the critical moisture content (CMC) of the surface air layer and the corresponding saturation moisture content (SMC) associated with the windshield surface temperature, as well as the impact of air velocity on the convective heat transfer coefficient. The results obtained here are leveraged to improve the T&H model, which is in turn validated with an additional experimental test, showing errors below 10%. Finally, numerical simulation is conducted to analyze the maximum return air ratio, which shows that with an elevated driving speed, an increased convective heat transfer coefficient leads to a subdued windshield temperature, which in turn causes the return air ratio to drop. This driving-speed-dependency of return air ratio becomes more pronounced as the relative humidity of exterior air increases.
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DOI：
10.4271/2015-01-0360
发表时间：
2015-04
期刊：
--
影响因子：
--
作者：
M. Leriche;Wolfgang Roessner;H. Reister;B. Weigand
通讯作者：
M. Leriche;Wolfgang Roessner;H. Reister;B. Weigand
DOI：
10.1016/j.egypro.2014.11.952
发表时间：
2014
期刊：
Energy Procedia
影响因子：
--
作者：
F. Qin;S. Shao;C. Tian;Hongxing Yang
通讯作者：
F. Qin;S. Shao;C. Tian;Hongxing Yang
影响因子：
6.4
作者：
Jongtae Lee;S. Kwon;Yunsung Lim;M. Chon;Daesik Kim
通讯作者：
Jongtae Lee;S. Kwon;Yunsung Lim;M. Chon;Daesik Kim
DOI：
10.4271/2010-36-0335
发表时间：
2010-10
期刊：
--
影响因子：
--
作者：
T. Zolet;G. F. F. Maia-G.-F.-F.-Maia-98855776;Getulio Gusmao Dutra;L. V. M. Pereira
通讯作者：
T. Zolet;G. F. F. Maia-G.-F.-F.-Maia-98855776;Getulio Gusmao Dutra;L. V. M. Pereira
影响因子：
10.4
作者：
M. Hosoz;M. Di̇rek
通讯作者：
M. Hosoz;M. Di̇rek