STUDY ON EFFECTS OF BUILDING LAYOUT ON URBAN VENTILAITON, OUTDOOR AIR QUALITY AND OUTDOOR THERMAL ENVIRONMENT

For energy conservation and good Indoor Air Quality (IAQ), it is crucial to improve Outdoor Air Quality(OAQ). For achieving good OAQ in urban areas, wind flow patterns among buildings should beimproved as well.In this paper, effects of building layout on outdoor thermal climate and air quality are investigatednumerically. In addition to the environment around pedestrians, enthalpy of outdoor air introduced intobuildings and its air quality are examined from the standpoint of IAQ. Specifically, three dimensionalbuilding block models incorporating various types of building layout were generated and analyzed usinga Computational Fluid Dynamics (CFD) technique. Obtained results demonstrate that properarrangements of open spaces can remarkably improve urban air quality and thermal environment evenamong densely located urban blocks with high floor area ratios. It is also found that planting lawns inopen spaces can significantly improve outdoor thermal environment.