The aim of our study was to apply a biomimetic approach, inspired by the Ammophila arenaria. This organism possesses a reversible leaf opening and closing mechanism that responds to water and salt stress (hydronastic movement). We adopted a problem-based biomimetic methodology in three stages: (i) two observation studies; (ii) how to abstract and develop a parametric model to simulate the leaf movement; and (iii) experiments with bimetal, a smart material that curls up when heated. We added creases to the bimetal active layer in analogy to the position of bulliform cells. These cells determine the leaf-closing pattern. The experiments demonstrated that creases influence and can change the direction of the bimetal natural movement. Thus, it is possible to replicate the Ammophila arenaria leaf-rolling mechanism in response to temperature variation and solar radiation in the bimetal. In future works, we will be able to propose responsive facade solutions based on these results.

In the previously published paper

To contribute to the control of climate change, it is essential to consider the relevance of facade glazing for promoting energy efficiency and thermal comfort. This article qualitatively analyzes two projects, starting with the identification of the envelopes as the initial parameter, followed by the selection of glass typologies, and finally, by the comparative analysis, considering the reduction of solar exposure inside the environment. The first project was the Jack H. Miller Center — USA, which obtained LEED certification, while the second, the Unibra University Center — BR, required intervention after its execution. The studies demonstrate that it is possible to improve thermal comfort by applying thermochromic films.

To help mitigate climate change, it is essential to consider the importance of façade glazing in promoting energy efficiency and thermal comfort. This article carries out a qualitative analysis of two projects, starting with the identification of the envelopes as a starting point, followed by the choice of glass typologies and, finally, a comparative analysis focusing on the reduction of solar exposure in internal spaces. The first project analyzed is the Jack H. Miller Center - USA, which received LEED certification, while the second, the Unibra University Center - BR, required interventions after its completion. The studies show that the application of thermochromic films can help improve thermal comfort.

A nova lógica econômica do mundo pede flexibilidade, se alimenta dos ativos culturais e criativos para gerar valor intangível e competitividade, buscando inc...