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Bioclimatic Architecture: The Latest Architecture and News

Cross Ventilation, the Chimney Effect and Other Concepts of Natural Ventilation

Sarah Kubitschek Hospital Salvador / João Filgueiras Lima. Image © Nelson Kon
Sarah Kubitschek Hospital Salvador / João Filgueiras Lima. Image © Nelson Kon

Nothing is more rational than using the wind, a natural, free, renewable and healthy resource, to improve the thermal comfort of our projects. The awareness of the finiteness of the resources and the demand for the reduction in the energy consumption has removed air-conditioning systems as the protagonist of any project. Architects and engineers are turning to this more passive system to improve thermal comfort. It is evident that there are extreme climates in which there is no escape, or else the use of artificial systems, but in a large part of the terrestrial surface it is possible to provide a pleasant flow of air through the environments by means of passive systems, especially if the actions are considered during the project stage.

This is a highly complex theme, but we have approached some of the concepts exemplifying them with built projects. A series of ventilation systems can help in the projects: natural cross ventilation, natural induced ventilation, chimney effect and evaporative cooling, which combined with the correct use of constructive elements allows improvement in thermal comfort and decrease in energy consumption.

5 Passive Cooling Alternatives Using Robotics and Smart Materials

The IAAC (Institute for Advanced Architecture of Catalonia) has developed a series of advanced materials and systems for air conditioning and passive ventilation, allowing homes to reduce interior temperatures up to 5 degrees lower while saving the electricity consumption caused by the traditional air-conditioning. The systems are made from long-lifespan materials, which lower the costs of maintenance in the long-term and can be used as low-cost alternative building technologies.

The projects highlighted are the Breathing Skin, Hydroceramics, Hydromembrane, Morphluid and Soft Robotics - all developed by students of the IAAC's Digital Matter Intelligent Constructions (conducted by Areti Markopoulou). The passive air-conditioning of spaces is investigated using a combination of new materials that mimic organic processes, adaptive structures and Robotics that help regulate temperature and create sustainable micro climates.