Joarder-et-al[1].pdf (6.42 MB)
Daylight simulation for sustainable urban office building design in Dhaka, Bangladesh: decision-making for internal blind configurations
conference contribution
posted on 2010-08-13, 11:49 authored by Md. Ashikur Rahman Joarder, Zebun Nasreen Ahmed, Andrew D.F. Price, Monjur MourshedIn an urban site, daylight strategies increasingly depend on the availability of natural light, which is influenced
largely by the immediate surroundings of the building, particularly the presence of natural and
manmade obstructions. Under such conditions the latitude of the site and its regional climatic conditions,
such as ambient outdoor daylight levels and sunshine probability are found to have diminished direct impacts
on the interior daylight potential. In these highly specific urban environments created by built-up
surroundings, no generalised way exists to describe or predict the luminous microclimate. However, simulation
can be used as a design tool for sustainable daylight design. Using simulation programs, this paper
examines the significant impact of surroundings on daylight probability on urban buildings. Daylight simulation
was performed in this study by creating the virtual urban environment based on the information
of a true site urban office building in Dhaka, Bangladesh, a tropical location, with predominantly overcast
skies. The 3D models were first generated for computer simulation in the Ecotect program to calculate
the amount of daylight incident on a generated grid point on the work-plane. These models were then exported
to Radiance Synthetic Imaging software to generate realistic lighting levels and finally verified with
DAYSIM simulation program for annual performance evaluation. The results show that daylight entering
from different sides of the building is affected vastly by surroundings and this influences the indoor illuminance
and luminance distribution. This paper also demonstrates a case of decision-making between two
most popular configurations (vertical and horizontal) of internal blinds used in urban offices of Dhaka. The
focus of the paper is to highlight the importance of daylight simulation in sustainable urban office building
design, while at the same time gives a general methodology for decision-making regarding daylight design
elements.
History
School
- Architecture, Building and Civil Engineering
Citation
JOARDER, M.A.R. ... et al, 2009. Daylight simulation for sustainable urban office building design in Dhaka, Bangladesh: decision-making for internal blind configurations. IN: Second International Conference on Whole Life Urban Sustainability and its Assessment (SUE-MoT 2009).Publisher
SUE-MoTVersion
- AM (Accepted Manuscript)
Publication date
2009Publisher version
Language
- en