Loughborough University
Browse
BS09_1706_1713[1].pdf (774.86 kB)

A simulation assessment of the height of light shelves to enhance daylighting quality in tropical office buildings under overcast sky conditions in Dhaka, Bangladesh

Download (774.86 kB)
conference contribution
posted on 2010-08-13, 10:53 authored by Md. Ashikur Rahman Joarder, Zebun Nasreen Ahmed, Andrew Price, Monjur Mourshed
The objective of this paper is to highlight the effectiveness of light shelves in tropical office buildings to enhance interior daylighting quality. Daylight simulation was performed for custom light shelves for a typical office floor of Dhaka City in Bangladesh, to determine the best possible location under overcast sky conditions. Six alternative models of a 3m high study space were created with varying heights of light shelves. The 3D models were first generated in the Ecotect to study the distribution and uniformity of daylight in the interior space with splitflux method. These models were then exported to a physically-based backward raytracer, Radiance Synthetic Imaging software to generate realistic lighting levels for validating and crosschecking the Ecotect results. The results showed that for achieving light levels closest to specified standards, light shelves at a height of 2m above floor level perform better among the seven alternatives studied including the alternative where no light shelves are present. Finally, the decisions were verified with DAYSIM simulation program to ensure the compliance of the decisions with dynamic annual climate-based daylight performance metrics.

History

School

  • Architecture, Building and Civil Engineering

Citation

JOARDER, M.A.R. ... et al, 2009. A simulation assessment of the height of light shelves to enhance daylighting quality in tropical office buildings under overcast sky conditions in Dhaka, Bangladesh. IN: Proceedings of the Eleventh International IBPSA Conference, (Building Simulation 2009), 27-30 July, Glasgow, Scotland, pp.920-927.

Publisher

© IBPSA

Version

  • VoR (Version of Record)

Publication date

2009

Publisher version

Language

  • en

Usage metrics

    Loughborough Publications

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC