Refrigeração evaporativa de telhados por meio de gotejamento de água. Experimento em bancada de testes

Abstract

The cooling effect of evaporation is used in dry climates buildings since ancient times. Water evaporation can remove heat of roofs, cooling the interior of buildings indirectly. This study presents the measurement results of a test bed which received two identical tiles, one of them receiving water application and the other kept dry. Its objective was to investigate the effects that the evaporation provokes on internal surface temperature of ceramic tiles and fibrocement tiles. Using regression analyses, strong correlations were found among the falls observed in tiles internal surface temperatures and the climatic conditions. The evaporation provoked reduction of until 18,7 oC in the ceramic roof and until 17ºC reduction in the fibrocement one.