Details

Autor(en) / Beteiligte

• Kanama, Najwa
• Ondarts, Michel
• Guyot, Gaëlle
• Outin, Jonathan
• Golly, Benjamin
• Gonze, Evelyne

Titel

Effect of energy renovation on indoor air quality and thermal environment in winter of a primary school in a highly polluted French alpine valley

Ist Teil von

• Journal of Building Engineering, 2023-08, Vol.72, p.106529, Article 106529

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• With increasing the COVID-19 pandemic and the time spent indoor, there is a growing research interest in the issue of Indoor Environmental Quality in building including thermal environment and indoor air quality (IAQ). Research and intervention in schools are a particular focus, as children are especially vulnerable to air pollution. The aim of this study is to assess the impact of energy renovation, including the installation of a balanced ventilation system with a filter (F7 type), on the IAQ of a school building located in a polluted outdoor environment. The study is based on measurements of some parameters of thermal environment and IAQ. To this end, two classrooms were chosen for two measurement campaigns. Each campaign covered 2 months in winter in 2018 and 2020 before and after renovation, respectively. The measurements included ventilation airflow rates, temperature, relative humidity, carbon dioxide, and particle concentration (PM2.5). The main result of installing the balanced ventilation was an increase in the air change rate from 0.1 h−1 and 0.05 h−1 before the renovation to 1.5 h−1 and 1.7 h−1 after the renovation, for classroom 1 and classroom 2, respectively. This increase changed the ICONE air stuffiness level from average air stuffiness to fresh air (no air stuffiness). However, this increase resulted in a significant entry of outdoor particles. As consequence, the highest indoor/outdoor concentration ratio (57%) was observed after the renovation. All these results highlights that ventilation performance should be extended to parameters as filtration efficiencies in order to increase IAQ. •Effect of the energy renovation in a school which consists of a mechanical ventilation with filter.•Analyze CO2, T, RH, PM2.5 and ventilation airflows in 2 classrooms before and after renovation.•Calculation CO2, T, RH and PM2.5-based Indoor Air Quality performance indicators in schools.•IAQ variability in the classrooms, before and after the energy renovation.•Impact of a dysfunction of the ventilation system on the rate of ventilation airflow, CO2 and PM2.5.