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With the acceleration of the process of China's urbanization, urban rapid population growth, urban congestion and environmental pollution problems have become increasingly prominent. The positive development of urban rail transit is one of the keys to solving these problems. Subway because of their fast, on time, large volume, comfort, convenience, and so acclaimed. Great efforts to build the subway at the same time, due to the relatively closed and the flow of people and other characteristics of the metro space, their environmental problems can not be ignored. It is necessary to research and analysis the metro high cost, high operating costs and the cost of late reformation before construction, its actual effect of the environmental control system design. Using CFD technology, Wuhan subway platform Airflow simulation study, the four programs (two supply air temperature difference, the two blower end) of the temperature field, velocity field and PMV distribution, analyze and compare four kinds simulation results under the program, to predict indoor thermal comfort, to provide a basis to select a reasonable temperature difference between the air supply and air supply end, and to optimize the design of the air conditioning and ventilation systems. With CFD technology, the paper also discusses the practical effect of the the the platform layer public areas and the rail line area fire, smoke control program. The analysis of the three conditions for the the platform layer public area fire, smoke spread. Contrast, found that \The hazards range of. Smoke screen to have been affected, although interested in the building structure is beautiful, but can effectively slow down the rate of diffusion of the flue gas. For the platform layer Rail line area fire, smoke effect of the three programs, found that: in the program under the action of the mechanical exhaust smoke tunnel rail top wind smoke, smoke diffusion has been effectively controlled. On this basis, set the \stratification can not effectively exclude sites flue gas, and should not be used. The conclusions of this study and recommendations for the optimal design of the environmental control system of the subway platform to provide evidence, but also conducive to the promotion and application of CFD in subway environmental control system simulation study.
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