天津市某地铁站排热系统实测研究
Experimental study on heat-exhausted system of a subway station in Tianjin
摘要：
以天津某地铁站为研究对象，对其排热系统进行了实测研究。通过对比分析排热系统不同运行工况下，隧道内空气温度和二氧化碳浓度、公共区空气温度和空调系统制冷量及排热风机排热量，研究了排热系统对于控制隧道内温度、二氧化碳浓度的作用，以及排热系统对于公共区热环境的影响。结果显示，即使在天津室外气温最高的时期，仅通过列车运行所产生的活塞效应及隧道壁面和周围土壤的自然冷却，就能保证隧道内空气温度和二氧化碳浓度始终满足要求，排热系统可以关闭或取消。
Abstract：
Taking a subway station in Tianjin as the research object, an experimental study on the heat-exhausted system is carried out. This paper compares and analyses the air temperature and the concentration of carbon dioxide in the tunnel, the air temperature in the public area, the cooling capacity of the air conditioning system in the public area, and the heat discharged by the heat-exhausted fans under different operating conditions of the heat-exhausted system, and studies the actual role of the heat-exhausted system in controlling the temperature and carbon dioxide concentration in the tunnel, as well as the influence of the heat-exhausted system on the thermal environment of the public area. The results show that even in the period with the highest outdoor temperature in Tianjin, the piston effect generated by train operation and the natural cooling of the tunnel wall and surrounding soil can ensure that the air temperature and the carbon dioxide concentration in the tunnel always meet the requirements of the standard, so the heat-exhausted system can be switched off or canceled.
Keywords:subway; heat-exhausted system; heat-exhausted fan; air temperature; carbon dioxide concentration; piston effect; natural cooling; energy conservation