Optimization of Operation Scheme for Subway Environmental Control System

This paper analyzes the theories of ventilation and heat transfer of subway environmental control system, and a relevant network model of subway lines has been built. Based on this model which can calculate air volume and thermal load of subway lines, the air flow distribution in each area of station under closed ventilation condition, opened ventilation condition, minimum fresh air condition, night ventilation condition and obstruction ventilation condition has been simulated, and the influence of open or close piston duct and bypass duct, mode of air supply and exhaust, air temperature in station hall and platform, minimum fresh air of air conditioning and VRV system of equipment room on the thermal environment has been studied. Finally concludes the specific affection of these factors to energy consumption of subway environmental control system and temperature of tunnel, and optimizes the operation scheme for subway environmental control system in different period and seasons.