IDENTIFICATION OF VENTILATION PROBLEMS IN AN UNDERGROUND BUS TERMINAL IN KOREA

摘要

It is the objective of the present study to identify ventilation problems and to suggest design modifications of the ventilation system to improve IAQ in the terminal. Numerical results on air velocity and concentration distributions are presented along with some of field experimental data on indoor concentrations of NO_x, CO and suspended particles. Results show many interesting aspects of airflow patterns affecting the ventilation characteristics of the building. System modifications on airflow rates and grille locations have been suggested from the numerical results in order to prevent direct short-circuiting of outdoor air and recirculation of contaminated indoor air. The overall exhaust performances of the modified conditions are compared quantitatively with existing ventilation condition using the concept of the mean residual-life-time of contaminated air.