![]() ![]() The roof surface represents about 20-25% of urban surfaces and 60-70% of the building envelope on average in Italy, depending on the building typology thus, it plays a very important role in the energy balance of buildings, and it is important to find appropriate solutions to improve its energy performance, also in relation to the specific climate. The results show how the application of a cool paint on the roof can enhance the thermal comfort of the occupants by reducing the operative temperatures of the rooms and to reduce the overall energy needs of the building for space heating and cooling. In order to investigate the effectiveness of cool roofs as a passive strategy for passive cooling in moderately hot climates, this paper presents the numerical results of a case study based on the dynamic thermal analysis of an existing office building in Catania (southern Italy, Mediterranean area). This technology is currently well known and widely used in the USA, while receiving increasing attention in Europe. However, the use of highly reflectivecool materials can help to maintain low outer surface temperatures this practice may improve indoor thermal comfort and reduce the cooling energy need during the hot season. ![]() Depending on the type of finishing layer, roofs can absorb a great amount of heat and reach quite high temperatures on their outermost surface, which determines significant room overheating. ![]() This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.īuilding roofs play a very important role in the energy balance of buildings, especially in summer, when they are hit by a rather high solar irradiance. Costanzo Received 1 July 2013 Accepted 10 September 2013 Academic Editor: Fu-Yun ZhaoĬopyright © 2013 V Costanzo et al. Doria 6, 95125 Catania, Italy Correspondence should be addressed to V. Noceraĭepartment of Industrial Engineering, University of Catania, VialeA. Study on the Application of Cool Paintings for the Passive Cooling of Existing Buildings in Mediterranean Climates Hindawi Publishing Corporation Advances in Mechanical Engineering Volume 2013, Article ID 413675,10 pages ![]()
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