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Universidad Autónoma de Querétaro (UAQ) 2010

Evaluación del confort térmico y comportamiento hidrológico en edificios urbanos con techos verdes para regiones semiáridas

Pérez González, Myrna Lorena

Titre : Evaluación del confort térmico y comportamiento hidrológico en edificios urbanos con techos verdes para regiones semiáridas

Auteur : Pérez González, Myrna Lorena

Université de soutenance : Universidad Autónoma de Querétaro (UAQ)

Grade : Maestría 2010

Résumé
The growing urbanization has transformed the environment and altered the ecosystems. Green roofs are a sustainable way to get back part of nature unique essence. The aim of this study was to implement and evaluate green roofs as a sustainable alternative to regulate the temperature inside a building in the urban area of Queretaro, and to assess the effect of the runoff generated by the eco-structures. The experiment was done in the graduate classrooms of the Engineering Faculty of the Universidad Autónoma de Querétaro (UAQ) at the 20°35’27" north latitude and 100°24’47" west altitude. The experimental building was divided into six parts three of them covered by a Pennisetum Clandestinum grass (Kikuyu grass) over a 10 cm layer of Vertisol soil. A roof without vegetation between two of the green roofs was used as control and another control, in similar conditions, was placed in an annex building without green roof. To evaluate the internal thermal comfort, air temperature was recorded every 10 minutes from April 2009 to April 2010 using a WatchDog sensor from the Spectrum Company. To assess the hydrological response of green roofs the rainfall volume and runoff were evaluated during the rainy season and the hydrographs for specific events were determined. The thermal results showed that green roofs are an effective alternative to regulate temperature and bring comfort by reducing the internal temperature in about 6 °C for warm season and increasing it in about 2 °C for cold season with respect to the control. The hydrological study showed that the green roofs delayed the starting time and runoff volume by increasing rainwater infiltration and storage. Data showed an average runoff reduction of 85% and runoff time lag of 10 to 15 min. Based on these results, it has been shown that green roofs are a good environmental strategy to achieve a better thermal comfort and reduce the runoff generated by buildings in semiarid urban regions.

Mots Clés : Techos verdes Confort térmico Comportamiento hidrológico Green roofs Thermal comfort Hydrological response

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Page publiée le 4 août 2017