Abstract
ABSTRACTThe objective of this study was to perform a daylighting analysis on the light shelf system installed to save energy in office buildings in Tamil Nadu. For this, a building was chosen for energy analysis simulation using Ecotect software. Light shelves with four different patterns of diffuse reflections in increasing levels were chosen at the preliminary stage. The illuminance was highest in the mirror finish followed by high reflective, medium reflective and light reflective partitions. The light shelf with the mirror finish was chosen for the economic analysis since it is more efficient than other diffuse reflection panels. Results of the economic analysis showed that lighting energy consumption was reduced by an average of 30% using the mirror finished light shelf with energy efficient lamps, compared with the base case model where lighting control was not applied. A simple payback period, calculated for the model with the light shelf system installed was 6 years and 4 months.
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