| With the citilized trend and the concentrated economic development, subway as one of the quick, comfortable and environment-protected transportation is being constructed in many big city. The subway transportation elevates year by year,the train number and speed is gradually improved, the energy of the environmental control system of subway therefore increases year by year.But because of more and more serious of oil problem, every social aspect think it important to make efficient use of energy and save energy. The energy of the environmental control system of subway takes great proportion of the energy of subway. It is very important for decreasing the running charge to save it and attracts corporation and design department attention.This dissertation takes The Chengdu subway as the background,and researches on the calculation method of the station'load hour by hour and frequency conversion applying to subway HVAC.Through analyzing the influent factors which are caused by train running, passenger density and decalescence of soil for environment control, This dissertation utilizes Subway Environment Simulation(SES) to simulate the tunnel environment with taking frequency conversion for tunnel fan in different periods, analyzes the fluctuatiom of the air temperature distribution in tunnel,and discusses the control method of frequence conversion. The result indicates that it can reduce the energy of tunnel ventilation system with the the use of frequcency conversion.This dissertation also analyzes the passenger hour by hour, light, equipment, decalescence of the station surrounding structure and fresh air load, and calculates the load of the HVAC hour by hour. Based on it, This dissertation also researches on the VAV and VWV system.The result indicates that the VAV and VWV system can both save large amount energy, but the VAV can save more.Taking frequency conversion for pump or fan is an important energy saving measure and can save the running cost and improve the economical benefit.
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