"Cross-ventilation" effect of piston wind and energy-saving evaluation for the ventilation and air condition in subway station

Abstract

This study takes a subway station of line 2 in Beijing as study object, based on the piston wind flow characteristics of a field test and a 1:8 scale model experiment combining the theoretical research and the numerical simulation, specially analyzed the influence on the piston wind flow characteristic of the different setting heights of the Semi-enclosed platform doors (SPDs), and based on the test results of air temperature and humidity in and out of the subway station analyzed the "cross-ventilation" effect of piston wind and evaluated its contribution to the energy consumption of the ventilation and air condition in subway station. Results show that little difference in the piston-wind volume exists when height of the SPDs changes [Enclosed platform doors (EPDs) or Semi-enclosed platform doors (SPDs)]; according to the summer weather condition of the large day-night temperature difference and the lower enthalpy in Beijing, a SPD can improve the indoor air quality and reduce the energy consumption of ventilation and air condition in subway stations in Beijing. © Springer-Verlag Berlin Heidelberg 2014.