Abstract
Underground high-speed railway station is becoming more and more popular in recent years, due to its advantage in relieving the tense situation of urban construction land. HVAC (Heating, Ventilation and Air Conditioning) system of underground railway station consumes large energy, therefore it is necessary to find a way to decrease the energy consumption in stations. Reasonable ventilation and air organization are the basis of energy-saving design of environment control system in stations. The energy consumption could be reduced greatly by utilizing the piston wind properly. In the present work, airflow characteristics in the station are investigated when high-speed train is passing through the underground railway station with CCM+ software. Results show that piston wind has different effects on airflow in the platform when the high-speed train is running. However, the air velocity in the platform is always lower than 5 m/s. In order to analyse the effect of piston wind on the airflow in the platform in more detail, the velocities and temperatures at waiting line are extracted. The air velocity near two ends of platform is larger and the similar results could also be observed for temperatures.
Highlights
More and more stringent regulations promotes the development of rail transit and the new energy technologies [1]
Research on the subway station shows that the energy consumption could be reduced greatly by utilizing the piston wind properly
Similar with subway station in structure, underground railway station could achieve the goal of energy conservation by utilizing the piston wind properly
Summary
More and more stringent regulations promotes the development of rail transit and the new energy technologies [1]. Rail transit has developed rapidly in the past 200 years, since the first railway was constructed in England. Rail transit system, including metro and subway systems, are mainly composed of the station and tunnel. It is necessary to operate heating, ventilation and air-conditioning (HVAC) systems to create the indoor thermal and humidity environment in stations, in which the health of passengers could be safeguarded. Compared with the traditional citizen building construction, the building scale of rail transit stations and passenger flow are both larger. The HVAC system of rail transit station will consume more energy. It has been revealed that environment control in stations has a great contribution to the energy consumption of rail transit [3, 4]. It is necessary to find a way to decrease the energy consumption in stations
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