The impact of the sky view factor (SVF) on the indoor thermal environment - Case study of a residential housing estate in Constantine, Algeria
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Abstract
This study investigates the effect of the sky view factor (SVF) at street level, on the one hand, and the facade orientation, on the other, on the indoor temperature of single-family houses in a semi-arid climate (Constantine). A series of measurements were taken at four measurement points representing the interior of four rooms, which were chosen based on the change in the SVF of the adjacent street and the orientation of the facade. The results were verified and validated with CitySim. CitySim was also used to calculate the street-level SVF, shortwave solar radiation (SWR), and surface temperature of the exterior wall. In addition, we created an SVF-based optimization scenario with four SVF values that were lower than the previous values. The goal is to determine the effect of SVF on the overall thermal behavior of the house and to obtain results applicable to a semi-arid climate (Constantine). The findings of this study favored a lower SVF at street level, i.e., the use of narrow streets and old fabrics. When the SVF value is reduced from (0.85) to (0.50), the surface temperature drops by 4.30°C; in this case, the surface temperature does not rise above 32°C for NE orientation. However, the indoor temperature has dropped by 2 degrees Celsius, allowing you to take advantage of shade in outdoor spaces while also reducing solar radiation received on surfaces, resulting in an appropriate indoor temperature.
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