Original scientific paper
https://doi.org/10.13044/j.sdewes.d7.0297
The Effect of a Naturally Ventilated Roof on the Thermal Behaviour of a Building under Mediterranean Summer Conditions
João Ramos
; Polytechnic Institute of Leiria, Rua General Norton de Matos, 2411-901 Leiria, Portugal
Luis Aires
; Polytechnic Institute of Leiria, Rua General Norton de Matos, 2411-901 Leiria, Portugal
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.
Keywords
Ceramic tile roof; Energy performance of buildings; Natural roof ventilation; Passive cooling; Experimental study; Sustainable construction.
Hrčak ID:
238743
URI
Publication date:
30.9.2020.
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