Airtightness and energy impact of air infiltration in resi buildings in Spain (I. Poza-Casado, ES) скачать в хорошем качестве

Airtightness and energy impact of air infiltration in resi buildings in Spain (I. Poza-Casado, ES)

Full title: Airtightness and energy impact of air infiltration in residential buildings in Spain (Irene Poza-Casado, Universidad de Valladolid, Spain) Addressing the airtightness of the building envelope is key to achieve thermal comfort, good performance of ventilation systems and to avoid excessive energy consumption. Previous studies have estimated an energy impact on infiltration on the heating demand between 2 and 20 kWh/(m2·y) in regions with temperate climates. In Spain, this issue has not yet been addressed in depth. This presentation and study aims to assess the energy impact of uncontrolled air flows through the building envelope in residential buildings in Spain. For this purpose, airtightness results of more than 400 blower door tests have been analyzed. Multi-family and single-family dwellings built in several periods and located in 9 regions with different climate characteristics have been studied. Infiltration was found to have an energy impact in the range 2.43 – 19.07 kWh/(m2·y) for the heating demand, whereas it is not so significant regarding the cooling demand. The obtained results show great potential for energy saving in the country. This presentation was given during the 40th AIVC - 8th TightVent & 6th venticool Conference “From energy crisis to sustainable indoor climate - 40 years of AIVC” held on 15-16 October 2019 in Ghent, Belgium.