Numerical Simulation Research Of The Air Quality And Air-flow Organization In Subway Train

ABSTRACT:Controlling of subway environmental is to make the passengers feel comfortable. In order to ensure uniform temperature inside the car, and to make the wind to maintain a certain speed, it requires the reasonable design.In order to improve the comfort of passengers, the outlet wind velocity is the important factor to affect the refrigeration. It is worth pointing out that the design of metro system must fully consider the safety of subway system and the risk factors of subway.With the expansion of network scale, passengers will rise further. The increase of the passengers is very prominent, and has become the norm. Therefore, in order to ensure the normal work of ventilation and air conditioning system of the vehicle, and to improve safety and comfort, it is necessary to carry out this study.This paper is under the project of the research on air quality monitoring and controlling. According to the research on the Beijing subway line one, line five, line ten and line fifteen and using numerical simulation technique, we obtained a series of stage research results. This study is divided into three parts, the first part is the train passengers comfort subjective survey, this part is in the collaboration with Beijing subway technical school, issued questionnaires to the passengers, after the recovery we dealed with the data in the lab. The second part is measuring the data in the Beijing metro line, we measured line one, line five, line ten and line fifteen, we measured data every time for drawing and analysis. The third part of this paper is the originalsize model by using PHOENICS software for Beijing metro train, comparing the simulation results with the measured results, they are very close to each other. At the same time, this paper established a variety of working conditions, discussed the comfort problem under various conditions, and provided many useful conclusions for design of metro.