Building roofs play a very important role in the energy balance of buildings, especially in summer, when they are hit by a ratherhigh solar irradiance. Depending on the type of finishing layer, roofs can absorb a great amount of heat and reach quite hightemperatures on their outermost surface, which determines significant roomoverheating. However, the use of highly reflectivecoolmaterials can help to maintain low outer surface temperatures; this practice may improve indoor thermal comfort and reduce thecooling energy need during the hot season.This technology is currently well known and widely used in the USA, while receivingincreasing attention in Europe. In order to investigate the effectiveness of cool roofs as a passive strategy for passive cooling inmoderately hot climates, this paper presents the numerical results of a case study based on the dynamic thermal analysis of anexisting office building in Catania (southern Italy, Mediterranean area). The results show how the application of a cool paint onthe roof can enhance the thermal comfort of the occupants by reducing the operative temperatures of the rooms and to reduce theoverall energy needs of the building for space heating and cooling.
|Titolo:||Study on the application of Cool Paintings for the passive cooling of the existing buildings in mediterranean Climates|
|Autori interni:||MARLETTA, Luigi|
|Data di pubblicazione:||2013|
|Rivista:||ADVANCES IN MECHANICAL ENGINEERING|
|Appare nelle tipologie:||1.1 Articolo in rivista|