Journal of the Korean Institute of Landscape Architecture (한국조경학회지)

The Korean Institute of Landscape Architecture (한국조경학회)
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Analysis of Thermal Environment Improving Effects of Green Curtain in Summer

Green Curtain 형식의 벽면녹화시스템을 통한 여름철 건물 실내 열환경 비교 분석

  • Lee, Sunyoung (Lab. of Landscape Architecture, Graduate School of Horticultural Science, College of Applied Life Sciences, Jeju National University) ;
  • Jo, Sangman (Lab. of Landscape Architecture, Graduate School of Horticultural Science, College of Applied Life Sciences, Jeju National University) ;
  • Park, Sookuk (Lab. of Landscape Architecture, Horticultural Science, College of Applied Life Sciences, Jeju National University)
  • 이선영 (제주대학교 생명자원과학대학 원예학과 대학원 조경학연구실) ;
  • 조상만 (제주대학교 생명자원과학대학 원예학과 대학원 조경학연구실) ;
  • 박수국 (제주대학교 생명자원과학대학 생물산업학부 원예환경전공 조경학연구실)
  • Received : 2022.06.15
  • Accepted : 2022.10.12
  • Published : 2022.10.31
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Abstract

In order to solve the limitations of horizontal thermal environment improvement, this study compared the thermal environment of the indoor and outdoor of a building in summer according to the presence or absence of a green curtain, a vertical greening method. In the summer of 2021, the air temperature, relative humidity, wind speed, and shortwave and longwave radiation were measured at a central point inside a building and the grass field outside of the building to determine the human thermal sensation index, PET and UTCI. As a result, the green curtain showed an average 1.6℃ cooler air temperature during the daytime, but it did not have an effect at night. For relative humidity, it showed higher humidity indoors by an average of 5.6% and 1.0% during the daytime and at night, respectively. Wind speed was 1.4-1.8 ms-1 and 1.4-1.5 ms-1 higher outdoors on average during the daytime and at night, respectively, showing a high value outdoors regardless of whether a green curtain was installed. The green curtain showed an average indoor mean radiant temperature reduction effect of 4.7℃ during the daytime, but it did not have an effect at night. In PET and UTCI, the green curtain reduced the indoor PET by about a 1/3 level, an average of 2.1℃, and the indoor UTCI by about a 1/6 level, an average of 1.1℃, during the daytime. However, no effects appeared in PET and UTCI at night. For landscape planning, a green curtain can effectively modify the thermal environment during the daytime in summer.

본 연구는 수평적인 열환경 개선의 한계점을 해결하기 위해, 수직적인 녹화방법인 green curtain을 이용한 건물의 벽면녹화 유무에 따른 여름철 건물 실내와 실외의 열환경을 비교하였다. 측정은 2021년 여름철 건물내부 중심부 지점과 건물 외부 잔디밭 지점을 대상으로 미기후 자료인 기온, 상대습도, 풍속, 태양 및 지구복사에너지를 측정하여 인간 열환경지수인 PET와 UTCI를 계산하여 비교 분석하였다. 그 결과, 주간 기온은 평균 1.6℃ 더 시원한 결과를 보였으며, 야간에는 green curtain의 효과가 나타나지 않았다. 상대습도는 주간에 평균 5.6%, 야간에 평균 1.0% 실내가 더 높은 결과를 보였다. 풍속은 주간에 평균 1.4-1.8ms-1, 야간에 평균 1.4-1.5ms-1로 green curtain의 설치 여부와 관계없이 실외에서 높은 값을 보였다. 평균복사온도는 평균 4.7℃ 감소 효과를 보여주었으며, 야간에는 green curtain의 효과가 나타나지 않았다. 인간 열환경지수인 PET와 UTCI 결과에서는 주간 PET는 평균 2.1℃의 저감 효과를 보여 1/3 단계의 실내 열지각 개선 효과를 나타내었으며, UTCI는 평균 1.1℃로 1/6 단계의 열스트레스 저감 효과를 보이는 것으로 나타났고, 야간에는 PET와 UTCI 모두 green curtain의 효과가 나타나지 않았다. 조경계획 시 여름철 주간시간대의 열환경 개선을 위한 방안으로 green curtain을 활용하는 것도 효과적일 것이다.

Keywords

Acknowledgement

이 논문은 2022학년도 제주대학교 교육·연구 및 학생지도비 지원에 의해서 연구되었습니다.

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