Foi publicado em julho o artigo “A labelling strategy to define airtightness performance ranges of naturally ventilated dwellings: An application in southern Europe”, da autoria de Vítor Cardoso do BUILT CoLAB (artigo resultante do seu trabalho no âmbito do doutoramento que acaba de concluir na FEUP – Faculdade de Engenharia da Universidade do Porto), em conjunto com Lurdes Simões (Construct, FEUP), Nuno Ramos (Construct, FEUP), Ricardo Almeida (Construct, IPViseu), Manuela Almeida (ISISE, UMINHO), e João Fernandes (ISISE, UMINHO).
Este artigo vai ser editado no Volume 269 da revista “Energy and Buildings” da Elsevier em Agosto de 2022.
Resumo do artigo:
Energy efficiency and indoor air quality are frequently-two conflicting objectives when establishing the air change rate (ACH) of a dwelling. In Europe, the northern countries have a clear focus on energy conservation, leading to an obvious awareness of the importance of airtightness, which translates into a high level of regulation and implementation. Meanwhile, the southern counterparts experience a more complex challenge by having predominantly passive ventilation strategies and milder climates, which often results in a more permissive approach.
This work proposes an innovative labelling methodology to classify the performance of naturally ventilated dwellings. A representative sample of a southern European national built stock is used in a stochastic process to create a pool of 43,200 unique dwellings. The simulation period refers to a month of the typical heating season in the southern European mild conditions. The results test the labelling methodology. With feature selection, ACH limits, and a labelling strategy, dwellings classify according to their ability to provide adequate ACHs.
The terrain was the best splitter of the dataset from the applied categorical variables. Regarding continuous variables, the airtightness was the one explaining most of the variability of the outputted ACHs, followed by the floor area. From the best performing dwellings labelled as compliant (Com), the average airtightness level was 5.3 h−1, with 4.9 h−1 and 5.8 h−1 in rural and urban locations.
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