| Title |
The Evaluation and the Improvement of Natural Ventilation in Tower-type Apartment Housing with Block Arrangement and Floor Plan |
| Authors |
Kim Ji-Yoeng ; Kim Tae-Yeon ; Leigh Seung-Bok |
| Keywords |
Block Type ; Arrangement Angle ; Main Wind Direction ; Unit ; Concentration of Pollutant ; IAQ(Indoor Air Quality) |
| Abstract |
In this study, first, the evaluation methods were defined; and using those methods, the way of arranging apartment block according to wind direction and unit planning principles were proposed to improve the natural ventilation in Tower-type apartment housing.The angle between the main wind direction and the main axis of the building was defined as 'arrangement angle' in order to analyze the natural ventilation performance depending on the wind direction. On three residential block types, analysis of eight orientations in the interval of 45 degrees were done to evaluate each amount of ventilation and airflow direction. 'Double wing type' revealed that each housing had even ventilation performance when the 'arrangement angle' was 180 degrees, and all of the air flows indicated positive direction. 'L type' showed the best performance with the 'arrangement angle' of 135 degrees, and 'Y type' showed the best performance in natural ventilation with the 'arrangement angle' of 45 and 180 degrees.The ventilation performance analysis in units with different adjacencies to outdoor and plan arrangements were done through evaluating pollutant concentration on each room by the diffusion of pollutant with the ventilation. 'Open end type' showed better ventilation performance overall compared to the 'open at right angle type' and revealed that the larger area of living space on inflow area the less concentration of pollutant. Based on the analysis three planning principles to reduce the concentration of pollutant were derived. The first, diffusion of polluted material should be prevented. The arrangement of kitchen/dining room should be near airflow outlets to prevent the diffusion of pollutant. Also, formation of wind path from bedroom to bedroom should be prevented to avoid the re-entering of pollutant from one bedroom to another. The second, airflow should be distributed in all spaces to avoid non-flow area. The third, the airflow short cuts should be avoided. When planning openings of a room, the openings should be cross-located for the airflow to cover the whole area. |