Impact of Residential Window Types On Daylighting and Natural Ventilation of Warm Humid Climate

Abstract

Environmentally conscious assessments of building design are recognizing that the newlineday lighting and natural fresh air are important commodities and should be newlineexploited to the full. How do our windows react to natural day lighting and natural newlineventilation? In warm humid climate windows should be large enough to maximize newlineventilation but at the same time it should be protected from direct sun to avoid solar newlineheat gain. Is it possible to achieve better performance towards both lighting and newlineventilation from the same window? newlineThe purpose of this research is to assess the impact of window typologies on indoor newlineair flow and daylighting in warm humid climate. Although passive lighting and newlineventilation can reduce the energy consumption without compromising the comfort newlinelevel of occupants, it is difficult to analyze both. By experimenting different types newlineof windows, this study tries to develop a basis for fenestration design principles for newlinenatural lighting and ventilation in warm humid climate. newlineImpact of window types on daylighting will be assessed in terms of uniform newlinedistribution of illumination and daylighting factor. For natural ventilation the newlineanalysis is based on mean air velocity ratio and distribution of airflow. newlineii newlineeach type of window is experimented for the lighting and ventilation. Lighting newlinesimulation is done in two methods with solar meter measurements and parametric full-scale model in ECOTECT. In the case of ventilation simulation, scaled physical model is tested in wind tunnel with hot wire anemometer readings. The newlineother one with ANSYS computational fluid dynamics in full scale model. newlineThe study concludes that the fenestration types minimally or significantly reduces newlinethe natural day lighting and ventilation, but the degree of impact can be newlineminimalized by a right fenestration design specific to the climate. I hope the newlinefindings of this research will help architects and engineers in design and selection of efficient windows. newline