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Amorim, Claudia et al. Innovative daylighting systems in non-domestic buildings: strategies for retrofit in tropical climate. In: CONFERENCE ON PASSIVE AND LOW ENERGY ARCHITECTURE, 20., 2003, Santiago do Chile. Anais... Santiago do Chile, 2003.
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Abstract

The importance to be concerned about carbon emissions, global warming and sustainable design becomes more and more evident in the entire world. Innovative daylighting systems can considerably reduce a building’s electricity consumption, improve the quality of light in indoor environment and can be a good alternative for retrofit, especially in non-residential buildings in tropical climates. The recent energy crisis in Brazil called the attention to some priorities in design process, like providing more daylighting to achieve more energy efficiency and comfort in buildings. The city of Brasília presents a high availability of daylight that should be used in a rational way, avoiding excessive heat gains but providing sufficient illumination for visual tasks. In this article, a governmental office building in Brasilia is evaluated regarding daylighting utilization, energy consumption and visual comfort by means of data survey, computer simulations and estimation procedures using simple design tools. The application of possible innovative daylighting systems, e.g. laser cut panels, prismatic glazing and daylight redirecting blinds as well as sun-protection glazing are going to be discussed as a retrofit strategy to be proposed. In order to cause significant savings for electrical energy, daylighting measures have got to be combined with a compatible daylight-responsive lighting control system. The results of the analysis are encouraging, showing that a coordinated combination of daylighting systems with light-controls has a high potential for the improvement of daylight- and energy-efficiency in non-residential buildings in tropical climate.
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