A STUDY ON THE INFLUENCE OF THE PISTON EFFECT ON THE AIR ENVIRONMENT QUALITY IN A SUBWAY STATION

摘要

This study takes a Beijing subway station as the calculation object, makes the calculation results of the SES software as the boundary conditions in the FLUNET software simulation process and uses the method of combining the field measurement and numerical calculation, to study the flow characteristics of the outdoor fresh air which is introduced through the ground entrance-exits based on the piston effect in the station. Study results show that: the fresh air volume introduced through the ground entrance-exits that based on the piston effect can basically meet the fresh air demand for 3837 people on the platform in off-peak hour.