Resumen de Rehabilitation of residential buildings with low thermal protection using ventilated wood façades
Claudiu Romila, Daniel Aelenei, Adrian Radu
Rehabilitation of the residential buildings with low thermal protection that do not comply with current efficiency requirements is a priority for reducing overall energy consumption in EU countries. The exterior walls are considered one of the most important elements of the building envelope due to large impact exerted in overall heat loss in virtue of their significant area.
One of the strategies currently considered in Romania for rehabilitation of old buildings consists in the application of an external opaque layer to the existing building envelope, the space between being either naturally ventilated or not. These systems, when properly designed, can lead to important energy savings with an increase of the durability of the exterior walls.
In this paper the thermal efficiency of a cavity wall made of an interior brick wall and an exterior wood cladding is analyzed numerically. The proposed model, based on a steady-state approach of the physical phenomena considered here as a thermal resistance network, is capable of predicting the heat fluxes for a wide range of parameters (sun radiation, system geometry, properties of materials, outside and inside ambient temperatures). The results obtained following the application of this simplified model are in relative good agreement with similar results reported in literature.
