Evaluation of Light Shelf Performance Detected in Overcast Sky, on Different Latitudes, in Clear Sky, in Natural Lighting

Year 2015, Volume: 28 Issue: 3, 445 - 455, 05.10.2015

Cüneyt Kurtay , Okay Esen

Abstract

The subject of this study is both determining the effect of location on earth and evaluating the effect of interior height to the position & dimension of light shelf used in natural lighting according to latitudes. After detecting the most suitable condition & dimension of light shelf for related latitude (0°) & interior height (300 cm) in CIE* standard overcast sky, the effects of the light shelf is evaluated in CIE standard clear sky on different directions in this paper. Calculations will be done for every determined latitudes and for different office heights. This study aims to guide the right light shelf application for different latitudes on earth. *CIE = International Commission On Illumination

Keywords

Light shelves , daylight simulation , overcast & clear sky , natural lighting

References

• YENER Alpin Köknel, “Binalarda Günışığından Yararlanma Yöntemleri: Çağdaş Teknikler”, VIII. Ulusal Sempozyum Bildirisi, İzmir, 2007. Kongresi,
• Internet: ÇETEGEN Duygu, ENARUN Dilek, YENER Alpin Köknel, BATMAN Alp “Günışığı – Yapay Işık Entegrasyonunu Sağlayan Işık Rafı Sisteminin Beleuchtungstechnik GmbH ve İTÜ Araştırma Fonu http://www.batmans.org/papers/12.pdf access: 20.12.2014. SITECO desteğiyle, , Last
• THUOT Kevin W., “ The Soralux Daylighting System: Passive Solar Illumination for Deep-Plan Building Spaces”, Master of Science İn Mechanical Engineering, M.I.T., June, 2011 Internet: http://bimcurriculum.autodesk.com/lesson/lesson- 5-daylighting, Last access: 20.12.2014
• HENSEN Jan L.M., LAMBERTS Roberto, “Building Performance Simulation for Design and Operation”, Spon Press, Oxon, UK, 2011
• ENEDIR Ghisi, “The Use Of Fıbre Optıcs On Energy Effıcıent Lıghtıng In Buıldıngs”, Doctor of Philosophy, of University of Leeds, March, 2002. Civil Engineering,
• European Standard EN 12464-1, Light & Lighting,
• Lighting of work places, 2011.
• JOARDER Ashikur Rahman, AHMED Zebun Nasreen, PRICE Andrew and MOURSHED Monjur, “A Sımulatıon Assessment Of The Heıght Of Lıght Shelves To Enhance Daylıghtıng Qualıty In Tropıcal Offıce Buıldıngs Under Overcast Sky Condıtıons In Dhaka, Bangladesh”, Eleventh International IBPSA Conference, 2009.
• Lighting Guide 7: Office Lighting – Addendum, The Society of Light and Lighting (CIBSE), London, July, 2012. Leed v.4 NC, January, 2014. Internet: Weather Data Sources, http://apps1.eere.energy.gov/buildings/energyplus/ weatherdata_sources.cfm, Last access: 20.12.2014.