地铁强冷和弱冷车厢的人体舒适率分析
陈阳1臧建彬2王涛1陈广旭1
Analysis of Human Comfort Level in Strong and Mild Airconditioned Metro Passenger Compartments
CHEN YangZANG JianbinWANG TaoCHEN Guangxu
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作者信息:1.上海电力大学能源与机械工程学院， 200090， 上海
2.同济大学机械与能源工程学院， 200092， 上海
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Affiliation:College of Energy and Mechanical Engineering, Shanghai University of Electric Power, 200090, Shanghai, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2023.09.037
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中图分类号/CLCN:U270.38+3
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栏目/Col:应用技术
摘要:
目的：在夏季高温天气，车厢内的温度冷热不均成为了地铁乘客反映最多的问题，因此有必要研究地铁车厢环境温度对人体舒适率的影响问题。方法：对7条地铁线路强冷和弱冷车厢的温度及湿度平均值进行实测分析；建立车厢模型，并明确模型的边界条件；根据地铁车厢环境温度的实测数据，采用计算流体力学的方法，针对强代谢率乘客和弱代谢率乘客在不同环境温度下的PMV(预测平均评价)热舒适性评价指标，分析地铁车厢内4种典型截面处的人体舒适率。结果及结论：强冷车厢内的温度约为23 ℃，弱冷车厢内的温度约为26 ℃，强冷车厢和弱冷车厢的温度差约为3 ℃，且同一节车厢内的温度也有2~3 ℃的上下浮动；强代谢率乘客在207~220 ℃温度范围内的舒适率较高，在220 ℃时的舒适率达到最高，车内舒适率为41%。强代谢率乘客在207~220 ℃温度范围内的车内舒适率较高；弱代谢率乘客在230~243 ℃温度范围内的舒适率较高，在243 ℃时的舒适率达到最高，车内舒适率为42%。
Abstracts:
Objective: In hot summer weather, uneven temperature distribution inside metro passenger compartments is a major issue reflected by passengers. Therefore, it is necessary to study the impact of metro compartment environmental temperature on human comfort level. Method: The average temperature and humidity values of strong and mild airconditioned compartments (hereinafter referred to as HLcool and LODcool) on 7 metro lines are measured and analyzed. Compartment models are established with defined boundary conditions. Based on the fieldmeasured data of metro compartment environmental temperature, CFD (computational fluid dynamics) method is used to analyze the human comfort level at four typical sections in metro compartments for the PMV (predicted mean value) thermal comfort evaluation index of passengers with high and low metabolic rates under different environmental temperature conditions. Result & Conclusion: The temperature inside HLcool compartment is approximately 23 ℃ while it is approximately 26 ℃ in LODcool compartments. The temperature difference between the two compartments is around 3 ℃, and the temperature in the same compartment also fluctuates up and down at 2-3 ℃. The comfort rate of passengers with high metabolic rate have a higher comfort level within the temperature range of 20.7-22.0 ℃, with the highest comfort level reached at 22.0 ℃, resulting in an overall comfort level of 41% in compartment. For passengers with low metabolic, the higher and highest comfort levels are 23.0-24.3 ℃ and 24.3 ℃, resulting in an overall comfort level of 42% in compartment.
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