Journal of the Korean Society of Environmental Restoration Technology (한국환경복원기술학회지)

The Korea Society of Environmental Restoration Technology (한국환경복원기술학회)
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The effect of Temperature Reduction of Green Roof using Rainwater Storage Tank

빗물 저류 시스템을 활용한 옥상 녹화의 온도 저감 효과

  • Yun, Seok-Hwan (Interdisciplinary program in Landscape Architecture and Integrated Major in Smart City Global Convergence Program, Seoul National University) ;
  • Kim, Eun-Sub (Interdisciplinary program in Landscape Architecture and Integrated Major in Smart City Global Convergence Program, Seoul National University) ;
  • Piao, Zheng-Gang (Dept. of Landscape Architecture and Rural System Engineering, Seoul National University) ;
  • Jeon, Yoon-Ho (Dept. of Landscape Architecture and Rural System Engineering, Seoul National University) ;
  • Kang, Hye-Won (Dept. of Landscape Architecture and Rural System Engineering, Seoul National University) ;
  • Kim, Sang-Hyuck (Dept. of Landscape Architecture and Rural System Engineering, Seoul National University) ;
  • Kim, Ji-Yeon (Interdisciplinary program in Landscape Architecture and Integrated Major in Smart City Global Convergence Program, Seoul National University) ;
  • Kang, Han-Min (Korea institute of green infrastructure) ;
  • Ham, Eun-Kyung (Korea institute of green infrastructure) ;
  • Lee, Dong-Kun (Dept. of Landscape Architecture and Rural System Engineering, Seoul National University)
  • 윤석환 (서울대학교 협동과정 조경학 & 스마트시티 글로벌 융합 전공) ;
  • 김은섭 (서울대학교 협동과정 조경학 & 스마트시티 글로벌 융합 전공) ;
  • 박정강 (서울대학교 생태조경.지역시스템공학부) ;
  • 전윤호 (서울대학교 생태조경.지역시스템공학부) ;
  • 강혜원 (서울대학교 생태조경.지역시스템공학부) ;
  • 김상혁 (서울대학교 생태조경.지역시스템공학부) ;
  • 김지연 (서울대학교 협동과정 조경학 & 스마트시티 글로벌 융합 전공) ;
  • 강한민 (한국그린인프라 연구소) ;
  • 함은경 (한국그린인프라 연구소) ;
  • 이동근 (서울대학교 조경지역시스템공학부)
  • Received : 2021.10.15
  • Accepted : 2021.12.23
  • Published : 2021.12.31
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Abstract

Thermal environment of city is getting worse due to severe urban heat island caused by climate change and urbanization. Green roof improves the urban thermal environment and save the cooling energy in buildings. This study presented a green roof combined with a storage system that stores rain-water and supplies water through a wick and evaluated the temperature reduction effect as surface temperature and amount of evapotranspiration. For about a week, the surface temperature using a infrared thermal imager and the evapotranspiration by recording change of module weight were measured at intervals of 30 minutes from sunrise to sunset. The results show that the mean surface temperature of the green roof was 15.4 degrees lower than that of the non-green roof from 12:00 P.M. to 14:00 P.M. There was no significant difference between mean surface temperature of green roof with and without storage system immediately after rain, but more than a week after rain, there was a difference with average of 2.49 degrees and maximum of 4.72 degrees. The difference in daily amount of evapotranspiration was measured to be 1.66 times on average. As drought stress increased over time, the difference in daily amount of evapotranspiration and surface temperature between with/without storage system increased simultaneously. The results of the study show a more excellent cooling effect of green roof combined with the rainwater storage system.

Keywords

Acknowledgement

본 결과물은 환경부의 재원으로 한국환경산업기술원의 도시생태 건강성 증진 기술개발사업의 지원을 받아 연구 되었습니다.(2020002770003)

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