地铁运营初期车站隧道气温变化规律研究

Study on Station Tunnel Air Temperature during Initial Stage of Metro Operation

为摸清运营初期地铁车站隧道的气温变化规律,采用定制的温度测试设备,对隧道进行了7天连续测试,根据测试结果,研究了隧道风机、排热风机室外温度等因素对车站隧道气温的影响。结果表明:车站隧道气温以24小时为周期变化,15:00点和6:00点分别达峰谷值。地铁运营时,隧道气温呈锯齿形周期变化,周期与地铁行车间隔相同。车站隧道气温呈多项式分布,各部位大小排序为:站点中部>出站端>进站端。隧道风机对隧道气温影响显著,使其接近室外气温,排热风机在夏季使隧道气温峰谷值分别降低0.5～1.75℃和0.15～0.4℃。室外气温影响隧道每天的平均、峰谷值气温,车辆散热影响隧道的瞬时气温。

To find out the air temperature change regulation of metro station tunnel in initial operation,using custom temperature test equipment,a continuous test of 7 days was conducted.Using the tested date,the effect of outdoor temperature,tunnel fan and other factors to the station tunnel air temperature was analyzed.The results show that the temperature of the station tunnel varies with 24 hours,and the peak and valley value of tunnel air temperature appears at 6:00 and 15:00 respectively.During the operation of the subway,the temperature in the tunnel varies in zigzag form,and the change period is the same as the departure interval.The air temperature of the station tunnel is polynomial distribution,high in the middle and low ends,and the outbound side is higher than the pitted side.The tunnel fan can greatly change the tunnel air temperature and make it close to the outdoor air temperature,while the exhaust fan in summer only reduces the peak and valley temperature of the tunnel to 0.5 to 1.75℃ and 0.15 to 0.4℃ respectively.The outdoor temperature and the heat dissipation of the vehicle affect the average daily peak and valley and instantaneous value of tunnel air temperature respectively.