The Impacts of Adjustable Light Shelf Heights over the Daylight Illuminance in Classrooms in Dhaka

Md Fahad Islam

doi:10.18034/ajase.v10i1.24

Authors

Md Fahad Islam Architect

Keywords:

Adjustable light shelf

Daylight simulation

Classroom

Light shelf height

Daylighting

Abstract

This paper investigates the effectiveness of adjustable light shelf heights in classrooms in Dhaka to improve interior daylighting quality. Daylighting simulations were carried out for a south-facing classroom in Dhaka to identify the best possible heights of light shelves at different times and seasons. Three alternative models of a 3.3m high classroom were generated using Rhinoceros 3D, and then Climate Studio, a plugin for Rhino, was used to analyze the uniformity and distribution of daylight in the classroom. In this research, simulation was performed on four dates, which represent four seasons of the year. The results showed that different heights of light shelves are suitable for different times and seasons of the year.

References

Ahmed, Z. N., 1987. 'The effects of Climate on the design and Location of windows for Buildings in Bangladesh', MPhil thesis. Sheffield City Polytechnic.

Berardi, U. & Anaraki, H. K., 2018. The benefits of light shelves over the daylight illuminance in office buildings in Toronto. Indoor and Built Environment, 27(2), pp. 244-262.

Islam, M. F. (2021). The Impact of Clerestory Window Height on the Performance of Fixed Horizontal Lightshelf on Daylighting Classroom in Dhaka, Bangladesh. Asian Journal of Applied Science and Engineering, 10, 18–25. Retrieved from https://upright.pub/index.php/ajase/article/view/29

Joarder, M. A. R., Ahmed, Z. N., Price, A. & Mourshed, M., 2009. A simulation assessment of the height of light shelves to enhance daylighting quality in tropical office buildings under overcast sky conditions in Dhaka, Banlgadesh. Glasgow, IBPSA , p. 920–927.

Kontadakis, A., Tsangrassoulis, A., Doulos, L. & Zerefos, S., 2017. A Review of Light Shelf Designs for Daylit Environments. Sustainability, [online] 10(2), p. 71.

Solemma , 2021. ClimateStudio. [Online]

Available at: https://www.solemma.com/climatestudio

[Accessed 01 August 2021].

Surat, Mirrahimi, S., Lukman, N. & Ibrahim, N., 2013. Effect of daylighting on student health and performance. Kuala Lumpur, WESEAS Press, p. 127–132.