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Title: The Effect of a Naturally Ventilated Roof on the Thermal Behaviour of a Building under Mediterranean Summer Conditions
Authors: Ramos, Joao
Aires, Luis
Keywords: Ceramic tile roof; Energy performance of buildings; Natural roof ventilation; Passive cooling; Experimental study; Sustainable construction.
Issue Date: 2020
Publisher: International Centre for Sustainable Development of Energy, Water and Environment Systems SDEWES
Project: Associate Laboratory LSRE-LCM-UID/EQU/50020/2019 
Serial title, monograph or event: Journal of Sustainable Development of Energy, Water and Environment Systems
Volume: 8
Issue: 3
Abstract: With the increasing cost associated with energy consumption, climate change and the greater awareness of the population to issues related to energy and environmental efficiency, energy conservation in buildings has been encouraged, along with the development of several solutions based on a more sustainable construction. Building cooling is the most challenging issue in the Mediterranean climate. The roof is one of the main elements of the building’s opaque envelope, where the choice of materials and the implementation of appropriate passive technologies determine the thermal performance of a building. The present work aims to assess the impact of natural ventilation of a roof cavity on the thermal environment of a dwelling house under Mediterranean summer conditions. An experimental study was developed in a small-scale prototype of a typical dwelling house, comprising a ceramic tile roof with vented eaves and insulated sub-tile panels according to the construction solution of the Humbelino Monteiro SA company. The thermal performance of this roof solution was assessed under real climatic conditions based on continuous measurements of the air velocity inside the air gap, the temperature of the air and the surface temperature of all roof layers. Weather conditions were also monitored continuously. Connected with the heat transfer mechanisms, the obtained temperature and air velocity profiles data were analysed and discussed.
ISSN: 18489257
DOI: 10.13044/j.sdewes.d7.0297
Rights: openAccess
Appears in Collections:I&D INESCC - Artigos em Revistas Internacionais

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