옥상녹화 재료에 따른 실내온도 저감효과에 관한 연구

This study is to select the optimal green roof materials for energy-saving by investigating their reducing effects on room temperature according to the rooftop materials. For the experiment, 6 1m square boxes were made of waterproof plywood 10mm thick. The tops of three boxes were filled with water, grass, or shrubs respectively and one box was used as a control subject without any fill materials. The two remaining boxes were placed on the each side of the 4 boxes to protect from outside influence on the experiment. In the experiment, ambient and room temperatures had been measured for 7 days when the outside temperature was more than 30 degrees. Each temperature was measured from 9:00 a.m. to 18:00 p.m. hourly, and only data taken from 12:00 to 17:00, when the temperature difference between outside and room temperature is relatively large, were used to investigate the effect of temperature reduction. The result of the study shows that grass has the highest effect on temperature reduction, shrubs and hydroponics are next. In addition, it shows that the lower the outside temperature is, the less the reduction effect is. In some cases, the room temperature of an empty room dropped more than that of the experimental groups after 5:00 p.m., which means green roofs can prevent the rapid change of room temperature. Finally, the experimental box without green roof was the most affected by the ambient temperature.