Temperaturas superficiais de telhas e sua relação com o ambiente térmico

Abstract

Este trabalho teve como objetivo a análise de temperaturas de telhas de barro, de fibrocimento com pintura branca na face superior e de aço zincado e sua relação com o ambiente térmico, quantificando também os Índices de Temperatura e Umidade (ITU), de Temperatura de Globo e Umidade (ITGU) e Carga Térmica de Radiação (CTR). As análises foram realizadas em modelos de edificações e na área não sombreada. Os resultados mostraram que as telhas cerâmicas e de fibrocimento apresentaram comportamentos térmicos semelhantes, sendo que a opção pela telha de fibrocimento de 5 mm, pintada de branca na sua face superior, é vantajosa economicamente. As telhas metálicas superaram os 53 °C na sua superfície e foram piores no conforto térmico comparado com as outras telhas. O ITGU foi superior na indicação do conforto térmico em relação ao ITU, principalmente no verão. Houve redução significativa da CTR pelas telhas em relação à área não sombreada.

Thermal behavior of alternative materials used as roof and efficiency of the reflective painting on the external face

“…According to [2], in not shaded areas, the temperature variation tends to follow the local climate, while inside the buildings, the coverage mitigates variations preventing the occurrence of abrupt thermal fluctuations. Among the characteristics of the roof that influence the thermal behavior of a cover, the most important are the constituent material, surface nature, existence and effectiveness of thermal insulation and liners [3,4].…”

Basic Unit Cost Simulation From Free-Stall Design to Dairy Cattle Confinement Using Different Construction Techniques

“…The tiles for coverage offer numerous advantages for the environmental thermal control, and they were combined with metallic and/or wood structures and profiles. But the best choice should be one that will provide the best cost benefit, because in accordance with TONOLI et al (2011), SAMPAIO et al (2011, the ceramic tile has lower thermal dissipation, but increases the weight of the structure and requires a more robust structure to support the load in greater spans and without support, also hindering the maintenance and cleaning. The aluminum tile is lighter, easy to maintain, but it generates a lot of noise on rainy days and dispels inner heat to the environment.…”

“…The tiles for the coverage, one of the most responsible for thermal comfort (TONOLI et al, 2011;SAMPAIO et al, 2011), were specified as follows: aluminum tile in wavy and trapezoidal profile with thickness of 0.5 mm (painted or varnished); aluminum thermal-acoustic tile in trapezoidal profile with thickness of 30.0 mm; fiber cement tile in wavy profile and thickness of 6 mm and French type ceramic tile (clay).…”

Thermal Environment of Table Grape Packing Houses in the São Francisco Valley

“…A study developed by SAMPAIO et al (2011) studying roof materials evaluated the RTL during winter and summer from 8 am to 6 pm. In the summer, there was a variation from 406.7 to 479.2 W m -2 , from 405.0 to 480.5 W m -2 and of 406.2 to 518.3 W m -2 for ceramic, fiber cement and metal tiles, respectively.…”