| Popis: |
Densification of urban centres and verticalization can significantly affect the availability of daylight in buildings. The external reflected component has a fundamental role on the luminance aspects, showing the great influence of the built environment in the calculation of daylighting. In this context, this study proposes to analyze the influence of the surroundings in illuminance at 48 indoor environments inserted in residential buildings in Manaira in city of Joao Pessoa-PB, assigning conditions to the same land: unobstructed, current and surrounding with maximum occupancy permitted by city's law. Research analysis takes into account four variables: 1) obstruction surrounding; 2) reflectance of surfaces; 3) Floors; and 4) orientation of environments. Daylighting performance was simulated by a computational method with Software Daysim 3.1e, extracting Useful Daylighting Illuminance data (UDI 300 3000lux) evaluated by statistical and graphical methods. It was observed a higher percentage of daylighting in the unobstructed building and an estimated difference of 13 % between scenario of maximum occupancy and the current surroundings. The floors more obstructed recorded illuminances below the useful range (UDI < 300lux) with percentage of area lit up 75% of UDI in the Northwest and Northeast facades. In Manaira case, future verticalization will result in reductions of illuminated area, within the range of useful illuminance, at 21.5 %, whereas the scenario with the average reflection coefficient identified in |
