Desempenho térmico de cobertura verde utilizando a grama Brachiaria humidicola na cidade de São Carlos-SP
Abstract
This work aims to analyze the thermal behavior of a green roof with the Braquiária
grass (Brachiaria humidicola), that reaches 1m height, comparing it with a traditional
roof (concrete slab on show). Considering temperature and relative humidity data
obtained through field measurements in different months, the thermal performance of
the green and traditional roofs was analyzed. The inside and outside temperatures,
and inside superficial of two test-cells were analyzed. The outside superficial
temperatures were estimated through computation program and the solar radiation
data and wind speed, necessaries for the use of this program, were provided by the
Water Resource and Applied Ecology Center (CRHEA,) and the Engineering School
of São Carlos (EESC), both from the University of São Paulo (USP). The results
indicate that, submitted to the local climate, the green roof presents optimum
performance, particularly for decreasing the temperatures of external and internal
roof surfaces. In the same test-cell it was recently realized a similar research, which
used the Esmeralda grass (Zoysia japonica), a short vegetation. Comparing the
measurement results for cold and hot periods, it was noticed differences between the
thermal performance of the two grasses.