[논문]Performance evaluation of light shelves

Warrier, G.A.; Raphael, B.

doi:10.1016/j.enbuild.2017.01.068

[해외논문] Performance evaluation of light shelves

Energy and buildings, v.140, 2017년, pp.19 - 27

Warrier, G.A. , Raphael, B.

Abstract ▼ AI-Helper

This paper aims to objectively evaluate the potential of light shelves to improve daylighting and visual comfort. This study consists of two parts. The first part is experimental and involves measurements taken on a scaled prototype. More than one million data points were collected using illuminance sensors installed on a test chamber. The data was analyzed statistically and the performance of the light shelf was evaluated for various configurations. A horizontal light shelf is found to increase the illuminance in the interior by an average of 21%. By rotating the external light shelf to an optimal angle, up to 300% increase in illuminance can be achieved. The second part of the study consists of purely theoretical simulations. Some new metrics such as useful daylight enhancement (UDLE) were developed specifically to evaluate the daylighting performances of light shelves. A case study of a hypothetical building in Chennai is taken and simulations are performed using Radiance lighting simulation software. 1080 simulations were performed under various configurations. It is found that most of the common assumptions about the performance of light shelves are not supported by simulation results. Even though, in many cases, the horizontal light shelf is able to improve illuminance at distances greater than the height of the window, the area where there is useful daylight enhancement is low. It is commonly assumed that light shelf provides shading near the window, thus eliminating glare. However, in 30% of the simulated cases, horizontal light shelves are found to increase the illuminance near the window, thereby increasing the possibility of glare. Light shelf is also found to decrease the uniformity in illuminance. These problems can be eliminated by using a rotatable light shelf.

주제어

참고문헌 (20)

Build. Environ. Aghemo 43 5 917 2008 10.1016/j.buildenv.2007.01.020 The approach to daylighting by scale models and sun and sky simulators: a case study for different shading systems

상세보기
Build. Environ. Claros 37 587 2002 10.1016/S0360-1323(01)00074-9 Indoor daylight climate-influence of light shelf and model reflectance on light shelf performance in Madrid for hours with unit sunshine fraction

상세보기
Energy Build. Meresi 116 190 2016 10.1016/j.enbuild.2016.01.009 Evaluating daylight performance of light shelves combined with external blinds in south-facing classrooms in Athens, Greece

상세보기
Energy Procedia Atzeria 45 463 2014 10.1016/j.egypro.2014.01.050 Internal versus external shading devices performance in office buildings

상세보기
Energy Procedia Berardi 78 1793 2015 10.1016/j.egypro.2015.11.310 Analysis of the impacts of light shelves on the useful daylight illuminance in office buildings in Toronto

상세보기
Solar Energy Claros 71 4 233 2001 10.1016/S0038-092X(01)00046-9 Indoor daylight climate-comparison between light shelves and overhang performances in Madrid for hours with unit sunshine fraction and realistic values of model reflectance

상세보기
Build. Environ. Soler 32 2 87 1997 10.1016/S0360-1323(96)00047-9 Light shelf performance in madrid, Spain

상세보기
Sol. Energy Freewan 82 343 2008 10.1016/j.solener.2007.08.003 Optimizing performance of the light shelf by modifying ceiling geometry in highly luminous climates

상세보기
Renew. Energ. Littlefair 5 920 1994 10.1016/0960-1481(94)90113-9 The performance of innovative daylighting systems

상세보기
Ward 1998 Rendering with Radiance: the Art and Science of Lighting Visualisation
Littlefair 1996 Designing with Innovative Daylighting
Light. Res. Technol. Mardaljevic 36 217 2004 10.1191/1477153504li120oa Verification of program accuracy for illuminance modelling: assumptions, methodology and an examination of conflicting findings

상세보기
Energy Build. Tsangrassoulis 24 223 1996 10.1016/S0378-7788(96)00981-4 Theoretical and experimental analysis of daylight performance for various shading systems

상세보기
Leukos Reinhart 3 1 1 2006 10.1582/LEUKOS.2006.03.01.001 Dynamic daylight performance metrics for sustainable building design

상세보기
Light. Res. Technol. Nabil 37 1 41 2005 10.1191/1365782805li128oa Useful daylight illuminance: a new paradigm for assessing daylight in buildings

상세보기
Energy Build. Nabil 38 7 905 2006 10.1016/j.enbuild.2006.03.013 Useful daylight illuminances: a replacement for daylight factors

상세보기
Mardaljevic 2011 27th Session of CIE International Conference Daylighting metrics for residential buildings
Energy Build. Wienold 38 743 2006 10.1016/j.enbuild.2006.03.017 Evaluation methods and development of a new glare prediction model for daylight environments with the use of CCD cameras

상세보기
Energy Procedia Torres 78 699 2015 10.1016/j.egypro.2015.11.074 Comparative analysis of simplified daylight glare methods and proposal of a new method based on the cylindrical illuminance

상세보기
Comput.-Aided Civ. Infrastr. Eng. Raphael 26 5 393 2011 10.1111/j.1467-8667.2010.00692.x Active control of daylighting features in buildings

상세보기

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증

[해외논문] Performance evaluation of light shelves

Abstract ▼ AI-Helper

주제어

참고문헌 (20)

이 논문을 인용한 문헌

관련 콘텐츠

원문 URL 링크

연관된 기능

이 논문과 함께 이용한 콘텐츠

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

선택된 텍스트