This study analyses the key principles in energy efficient lighting design for a commercial office building in India. Detailed assessment of the passive and active design features is carried out and is complimented by in-situ measurements and simulations. The results show that the building geometry, orientation & envelope is well planned to permit natural daylight to most of the interior spaces. Field measurements show that the office space along south perimeter is sufficiently day-lit than the north, detailed investigation into these are also presented. Simulations indicate that the use of light shelves is highly effective resulting in 78.54% of interior space receiving a Daylight factor (DF) of more than 1.9, as against 52% without the light shelves. It is also noted that the use of T5 luminaries is very efficient in achieving an operational Lighting Power Density (LPD) of 4.95 Watts per square meter.
[1]
Reshma Singh.
Best Practices Guide for High-Performance Indian Office Buildings
,
2014
.
[2]
Elena G. Dascalaki,et al.
Passive retrofitting of office buildings to improve their energy performance and indoor environment: the OFFICE project
,
2002
.
[3]
Guy R. Newsham,et al.
Effect of daylight saving time on lighting energy use: A literature review
,
2008
.
[4]
Åke Blomsterberg,et al.
Energy saving potential and strategies for electric lighting in future North European, low energy office buildings: A literature review
,
2011
.
[5]
Alfonso Soler,et al.
Indoor daylight climate–influence of light shelf and model reflectance on light shelf performance in Madrid for hours with unit sunshine fraction
,
2002
.