The Study Of Comfort And Energy-Consumption Of Platform Bailout Doors System And Platform Screen Doors System In Subway

Subway has become the main transportation system in big cities for its convenience and rapid speed. With the development of the society and the improvement of the living level and the demands of comfort, energy-saving is urgent with the lack of energy sources. So it is very important to study the comfort and the energy consumption of the subway. From the two aspects, the author developed the study of the platform bailout doors system and platform screen doors system in the north of our country, which can be reference for the estimate and choice of the schemes of environment control, and the designs of practical projects.Computational simulations were adopted to study the comfort and energy consumption of the two systems in this paper. Firstly, heat and humility loads computation model was established according to the different characteristics of two systems. Then, after verified by the test data, the CFD model of the subway No.1 line Xiawafang station in Tianjin was applied to carry out the comfort simulation in summer and winter of the two systems. The research of comfort was carried out by comparative analysis of the comfort indexes on different transects of the station hall and the station platform, such as temperature field, speed field, PMV, and PPD etc.Simultaneously,the Xiawafang station was simplified to make it easier to analyze as an actual building, by the EnergyPlus, a building simulation program. The energy analysis model was built to evaluate the energy cost of the two systems over a year, which was divided to three stages: summer season, transition season, and winter season. The result of the simulation helped to carry out quantitative analysis the energy consumption of Air-condition and Ventilation in the different season stages and the whole year.Based on the above analysis and study of comfort and energy consumption, the following conclusions are obtained:(1) Though the environment control system is complicated, the comfort of the subway station can be simulated nicely by adopting the Airpak software with the standard k -εequation, after simplifying geometry models reasonably and setting the boundary conditions accurately.(2) Through the quantitive analysis of the comfort of the two systems, the comfort of the platform screen doors system is obviously better than that of the platform bailout doors system in air conditioning season, and the comfort of the platform bailout doors system is slightly better than that of the platform screen doors system in winter.(3) The results of the energy consumption simulation by EnergyPlus are consistent of the analysis of the theories, which verified the applicability and practicability to energy consumption simulation and analysis of the subway.(4) The whole year energy consumption of the air conditioning and ventilation system of the platform screen doors system is slightly smaller than that of the platform bailout doors system. The platform screen doors system can save 2 percent compared to the platform bailout doors system.