ANALYSIS OF HYGROTHERMAL PERFORMANCE AND MOULD GROWTH ON CONCRETE TILES
Gerson Henrique dos Santos1; Nathan Mendes2
1 Federal Technological University of Paraná- UTFPR; 2 Pontifical Catholic University of Paraná - PUCPR
doi:10.20906/CPS/COB-2015-0270
Resumo
Roofs play an important role on energy consumption and thermal comfort, especially in low-rise buildings. In this context, the use of cool roofs can reduce energy consumption by decreasing air conditioning needs, improving indoor thermal comfort and extend roof service life. However, after long service life, the solar absorptivity coatings can be increased due to mold or algae growth, decreasing their thermal performance. Therefore, a mathematical model considering the combined two-dimensional heat, air and moisture transport through an unsaturated roof is presented. The differential governing equations are based on driving potentials of temperature, moist air pressure and water vapor pressure gradients. In the results section, the effects of moisture adsorption and desorption on the thermal performance of concrete tiles due to an additional transport mechanism is shown and a well-known model for predicting mould growth is applied illustrating a risk index.
Palavras-chave: hygrothermal performance; mold growth; concrete tiles