Abstract
It is known that glazed openings are very important elements in the energetic behavior of buildings, especially in Mediterranean climates where there are many hours of solar radiation. The objective of this study was to determine the influence of solar protection on the energy demand of public housing structures in these climates. To this end, the reduction in energy demand achieved by fixed solar protectors in combination with mobile protectors (blinds) was quantified, including an evaluation of the influence of their geometry, dimensions, degree of openness, and the orientation of the opening. To analyze and quantify energetic demand, a block of public housing units in a neighborhood of Seville (latitude 37°23' N) was used as a model. This block is typical of public housing in the Mediterranean region. Simulated energetic models were created using DesignBuilder, achieving reductions in the annual energy demand from 10% to 27% according to the orientation chosen. The results and conclusions of the study are applicable to new construction, energetic rehabilitation projects, and/or the improvement of existing buildings.
Highlights
This study is part of the Research, Development and Innovation project known as Efficacia, financed by the Andalusian Government and by companies in the construction sector, with an overall objective of reducing the energy consumption and environmental impact of public housing in southernSpain [1]
This final phase is the subject of this article, in particular, the influence of façade solar protection elements on the energetic demand of the analyzed housing units
The results shown are representative of buildings in housing units with glazed openings that constitute approximately 20% of the total façade surface and with windows that have an average height of 1.2 m
Summary
This study is part of the Research, Development and Innovation project known as Efficacia, financed by the Andalusian Government and by companies in the construction sector, with an overall objective of reducing the energy consumption and environmental impact of public housing in southern. To achieve this objective, the project has analyzed the incidence of each thermal envelope component in a block of public housing units with an enclosed courtyard. The third and final phase centered on the control and automation of ventilation using active systems and solar protection elements This final phase is the subject of this article, in particular, the influence of façade solar protection elements on the energetic demand of the analyzed housing units. Lee and Tavil [15] studied the total energy demand and peak consumption in office buildings by analyzing the influence of horizontal overhangs They varied dimensions and position relative to the window for the different ratios of glazing surface to total façade area in Chicago (41°50' N) and Houston (29°46' N). The results shown are representative of buildings in housing units with glazed openings that constitute approximately 20% of the total façade surface and with windows that have an average height of 1.2 m (typical parameters in public housing dwellings in the Mediterranean area)
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