| Texto completo | |
| Autor(es): |
Alchapar, Noelia
;
Giancola, Emanuela
;
Perez, Gloria
;
Terraza, Maira
;
Pezzuto, Claudia
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | URBAN SCIENCE; v. 9, n. 10, p. 20-pg., 2025-10-16. |
| Resumo | |
The intensification of thermal stress in cities due to urbanization and climate change underscores the urgent need to improve outdoor habitability. This study analyses the influence of three opaque fa & ccedil;ade technologies-traditional, lightweight and external thermal insulation composite systems-combined with two albedo levels (0.30 and 0.80), on summer outdoor conditions in Mendoza (Argentina), Madrid (Spain) and Campinas (Brazil). Using a calibrated microclimatic model with ENVI-met v5.6 software, a digital replica of a 10-storey urban canyon was simulated to generate 18 scenarios, assessing the effect of fa & ccedil;ade thermal mass and reflectivity on the urban microclimate. The results show that (i) scenarios that mainly affect air temperature (AT) are those that modify the thermal mass of the fa & ccedil;ade technologies. For example, traditional technology with a low albedo reduce maximum AT by up to 1.2 degrees C in Campinas, 0.89 degrees C in Mendoza, and 0.81 degrees C in Madrid compared to light technology with the same albedo level. (ii) Mean radiant temperature (MRT) increases significantly in scenarios involving lightweight fa & ccedil;ade by 4.53 degrees C in Madrid, 4.46 degrees C in Mendoza, and 3.39 degrees C in Campinas. Conversely, increasing fa & ccedil;ade albedo further amplifies MRT due to multiple reflections in urban canyons with increases of 6.50 degrees C in Campinas, 6.09 degrees C in Mendoza, and 5.33 degrees C in Madrid. The impact is more pronounced with traditional fa & ccedil;ades. (iii) Traditional fa & ccedil;ades and low-albedo ETIC systems experience the fewest hours of very high thermal stress (UTCI > 38 degrees C), whereas lightweight fa & ccedil;ades increase exposure to extreme heat. Overall, air temperature is primarily determined by fa & ccedil;ade thermal mass, mean radiant temperature by surface reflectivity, and thermal comfort by the combined effect of both. These findings confirm that high reflectivity can be counterproductive in dense urban canyons, emphasizing the importance of climate- and morphology-sensitive fa & ccedil;ade strategies for urban resilience. (AU) | |
| Processo FAPESP: | 23/09875-1 - Estratégias de resfriamento urbano para o aumento da habitabilidade em cidades: estudo de caso em jundiaí,sp |
| Beneficiário: | Claudia Cotrim Pezzuto |
| Modalidade de apoio: | Auxílio à Pesquisa - Pesquisa em Políticas Públicas |
| Processo FAPESP: | 24/01299-4 - Promoção da resiliência energética e ambiental das cidades por meio do desenvolvimento de tetos frios para resfriamento urbano, captura de CO2 e produção de H2 |
| Beneficiário: | Lia Toledo Moreira Mota |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Regular |