Mixing Property and the Heat Exhaust Effect under Cross Ventilation in a Full-Scale Experimental Model

AbstractCross ventilation is one of the most important techniques for achieving energy conservation and for maintaining a comfortable indoor environment in hot summer periods. However it is difficult to evaluate the effect of cross ventilation quantitatively and to undertake design based on a quantitative evaluation. This is because the indoor environment is uneven and changes according to the outside conditions. It is difficult to predict the ventilation rate under cross ventilation due to the variation in wind. Hence it is still difficult to estimate indoor comfort conditions given by cross ventilation. In this paper full-scale model cross ventilation experiments are described and the properties of airflow in and around the full-scale model (velocity field, pressure distribution on surface, visualized flow pattern, heat transfer coefficient distribution, discharge coefficient of openings and so on) have been examined. The mixing property and heat exhaust effect of cross ventilation are discussed. Tracer...