Brise-soleil responsivo: desenvolvimento, construção, análise do desempenho térmico, lumínico e da percepção do usuário em uma Câmara Bioclimática de Baixo Custo (CBBC)

Abstract

Responsive brise-soleil is a shading element capable of adapting its rotation angle according to indoor and outdoor environmental conditions to improve the thermo-energy performance of the building and provide greater comfort to users. This improvement in thermal performance tends to reduce the energy demand associated with the operational phase of the construction. The results obtained with a systematic review of the literature pointed to the scarcity of academic production associated with responsive façade components development and performance evaluation. In the same way, academic content regarding user perception in responsively shaded environments associated to the comfort models adopted in this thesis. Furthermore, the developed system is innovative regarding brise-soleil fin rotation to promote thermal and light gain. Therefore, this work aimed to develop a responsive shading system and evaluate its thermal and luminous performance and its impact on user perception and satisfaction. The thermal and luminous parameters adopted are based on the Adaptive Comfort Model (ANSI/ASHRAE 55) and Useful Daylight Illuminance. Three methods were used to meet the objective of this research: (1) systematic literature review with terms associated with responsive architecture; (2) experimental method with the construction of a prototype to evaluate the thermal and luminous performance of a test cell under three conditions: no shaded, shaded with a static brise-soleil, and shaded by a responsive brise-soleil; and, (3) quasi-experimental method, with replication of the concepts of the project developed in step 2, in full scale, at the Cost-effective Bioclimatic Building Chamber (CBBC), to evaluate the thermal and luminous performance and their influence on user’s perception and satisfaction. As a result of the measurements performed in a test cell, the responsive model increased the percentage of thermal comfort and the constancy of internal illuminance levels within the desired range. The results obtained with the full-scale model point to an improvement in the thermal and lighting performance of the environment under analysis, with the anticipation of the thermal comfort range period in the early morning. Besides this, maintenance of light levels in the visual comfort range. Furthermore, from user’s point of view, there was majority satisfaction regarding the thermal, luminous, and visibility conditions provided by the responsive brise-soleil.