Termografia passiva no diagnóstico de patologias e desempenho térmico em fachadas de edifícios através de câmara térmica instalada em drone. Abordagem preliminar em Coimbra (Portugal).

Thermography is a non-destructive technique that allows the visualization of infrared radiation through visible thermal images. It may take place at great distances from the surfaces under analysis and it may be quite advantageous in sustainability issues of urban rehabilitation. This technique allows, based on the results obtained, the development of new efficient solutions, such as more durable coatings and/or greater insulation capacity, allowing the identification of pathologies that can hardly be detected by other methods. This also allows maintenance to be done timely, without the risk of deterioration. This measurement depends on different parameters that can influence its results, such as emissivity, the camera-surface distance, the observation angle, reflectivity and color. In this case, for building facades, it is also added to the above-mentioned parameters some environmental conditions, as solar radiation and wind predominate. The development of this exploratory study stands out fundamental ly for its practice, from the collection, interpretation and justification of the thermal buildings data. Regardless of the different conditions present on different days, it was possible to identify the constituent materials and record the different temperature patterns, such as the thermal transition between the same materials over the hours, orientation, exposure and different colors, as well as the passage of masses of hot and cold air from inside of buildings to its exterior. This work is relevant to a study of implementing measures for greater urban efficiency in the existent building portfolio and, consequently, achieving greater urban sustainability. [ABSTRACT FROM AUTHOR]