ESTUDO DE CASO

ANÁLISE DE OFUSCAMENTO EM AMBIENTES INTERNOS E MEDIDAS DE MITIGAÇÃO EM EDIFÍCIOS ALTOS EM CLIMAS SUBTROPICAIS

Abstract

The quality of indoor environments concerning natural light is an essential topic to consider due to the acceptance of internal luminance and visual comfort. Buildings with glass façades favor the contribution of natural light and visibility with the outside environment. However, it has implications such as the excess of light flow near the facades and high levels of vertical illuminance, causing an increase in contrast in relation to background illuminance, mainly in deep plants and, therefore, applying mitigation strategies as solar screens, blackout blinds and films. Thus, the study's objective is to evaluate the application of strategies to mitigate the probability of glare utilizing the indicator daylight glare probability (DGP). The definition of the object of analysis was due to the occurrence of glare reported by the building's occupants perimeter areas of the façades. The computer simulation results showed that even with internal blinds, the probability of glare discomfort is high due to the medium or increased incidence of direct radiation in the buildings facades, making it necessary to substantially reduce the flow of light through combined solar films and internal shading elements, negatively impact visibility with the external environment. The DGP results showed a direct correlation between vertical illuminance levels and the users' perception of glare.