본문 바로가기
HOME> 논문 > 논문 검색상세

논문 상세정보

Building and environment v.114, 2017년, pp.397 - 409   SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Observational studies of mean radiant temperature across different outdoor spaces under shaded conditions in densely built environment

Lai, Alan (School of Architecture, The Chinese University of Hong Kong, Shatin, Hong Kong, China ); Maing, Minjung ( School of Architecture, The Chinese University of Hong Kong, Shatin, Hong Kong, China ); Ng, Edward ( School of Architecture, The Chinese University of Hong Kong, Shatin, Hong Kong, China );
  • 초록  

    Abstract High-density urban environment affects urban microclimate, and thermal comfort of outdoor spaces. Shading by urban structure is the primary measure to reduce daytime mean radiant temperature (MRT) by blocking direct solar radiation. However, it is believed that overly-restricted Sky View Factor (SVF) limits the radiative cooling by the sky of lower effective temperature. Therefore, this study aimed at examining the relationship between SVF and MRT in built environment. To investigate the dependence of MRT on SVF via radiant fluxes, this study performed field measurement of six directional long-wave, short-wave fluxes and MRT across a number of outdoor spaces under shaded in densely built environment. Regression analysis was employed in examining desired relationships. Across different open spaces, MRT would increase by 1.6?K per 10?W/m 2 increase of either long-wave or short-wave radiant fluxes. Global solar radiation and air temperature are the most influential meteorological parameters affecting radiant fluxes components in MRT. Besides, this study suggests the use of long-wave mean radiant temperature (LMRT) representing effective surface temperature of surrounding objects. LMRT generally follows the temporal pattern of reference air temperature. In a case study, if SVF is decreased by 0.1, the weighted sum of long-wave fluxes would be increased by 10?W/m 2 . This would bring an increase of 1.6?K in MRT. But, SVF has weak explanatory power to variations in short-wave fluxes when under shaded. Larger SVF is preferred for cooling open space in hot and humid region if direct sunlight is already blocked by urban morphology. Highlights MRT increase by 1.6?K per 10?W/m 2 increase of weighted sum of long-wave or short-wave radiant fluxes. If SVF is decreased by 0.1, the W.SumL would be increased by 10?W/m 2 . Larger SVF is preferred for cooling open space in hot and humid region if direct sunlight is blocked by urban morphology. Horizontal SVF and radiant fluxes are important in MRT.


  • 주제어

    Mean radiant temperature (MRT) .   Long-wave mean radiant temperature (LMRT) .   Horizontal radiant fluxes .   Horizontal Sky View Factor (HSVF) .   Sky View Factor (SVF).  

 활용도 분석

  • 상세보기

    amChart 영역
  • 원문보기

    amChart 영역

원문보기

무료다운로드
  • 원문이 없습니다.

유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.

NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.

이 논문과 함께 출판된 논문 + 더보기