地铁车站月平均气温随运营年限演化特性
Evolution characteristics of monthly average temperature ofsubway stations with operation years
摘要：
建立了地铁车站空气热平衡理论模型,基于区间隧道空气温度和车站围岩土体蓄放热量,得到车站月平均气温在运营初期、中期和远期的逐年演化特性。研究结果表明：随着地铁车站运营年限的增长,月平均气温呈现逐年上升趋势,运营第15年较第1年,车站月平均气温在1月温升最低为3.1 ℃,8月温升最高为10.6 ℃;在现有地铁行车密度随运营年限增大的运行模式下,地铁车站运营初期行车密度仅为15对/h,夏季车站最高气温出现在第5年,为26.4 ℃,远低于夏季站厅站台空调设计温度平均值29 ℃,所以运营初期车站空调系统提供的冷量远大于车站的冷负荷需求,初期车站空调系统存在一定的节能空间。
Abstract：
This paper establishes the theoretical model of air heat balance in subway stations. Based on the air temperature of the interval tunnel and the heat storage and release of the soil surrounding the subway station, the annual evolution characteristics of the monthly average temperature of subway stations at the initial, middle and long stages of operation are obtained. The study results show that with the increase of the operation years of the subway station, the monthly average temperature shows an upward trend year by year. In the 15th year of operation, compared with the first year, the monthly average temperature of the station has a minimum rise of 3.1 ℃ in January and a maximum rise of 10.6 ℃ in August. Under the existing operation mode of the subway train density increasing with the operation years, the initial train density of the subway station is only 15 pairs per hour, and the highest air temperature of the station in summer is 26.4 ℃ in the 5th year, which is much lower than the average air conditioning design temperature of 29 ℃ in the station hall and platform in summer. So the cooling capacity provided by the station air conditioning system is much larger than the cooling load demand of the station at the initial stage of operation, and there is a certain energy-saving potential in the station air conditioning system.
Keywords:subway station; monthly average temperature; operation year; evolution characteristic; air heat balance; heat storage and release of soil; energy saving