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Natural Ventilation Characterization in a Classroom under Different Scenarios

Author

Listed:
  • Sergio A. Chillon

    (Nuclear Engineering and Fluid Mechanics Department, University of the Basque Country, UPV/EHU, Nieves Cano 12, Vitoria-Gasteiz, 01006 Araba, Spain)

  • Mikel Millan

    (System Engineering and Automation Control Department, University of the Basque Country, UPV/EHU, Nieves Cano 12, Vitoria-Gasteiz, 01006 Araba, Spain)

  • Iñigo Aramendia

    (Nuclear Engineering and Fluid Mechanics Department, University of the Basque Country, UPV/EHU, Nieves Cano 12, Vitoria-Gasteiz, 01006 Araba, Spain)

  • Unai Fernandez-Gamiz

    (Nuclear Engineering and Fluid Mechanics Department, University of the Basque Country, UPV/EHU, Nieves Cano 12, Vitoria-Gasteiz, 01006 Araba, Spain)

  • Ekaitz Zulueta

    (System Engineering and Automation Control Department, University of the Basque Country, UPV/EHU, Nieves Cano 12, Vitoria-Gasteiz, 01006 Araba, Spain)

  • Xabier Mendaza-Sagastizabal

    (Nuclear Engineering and Fluid Mechanics Department, University of the Basque Country, UPV/EHU, Nieves Cano 12, Vitoria-Gasteiz, 01006 Araba, Spain)

Abstract

The COVID-19 pandemic has pointed to the need to increase our knowledge in fields related to human breathing. In the present study, temperature, relative humidity, carbon dioxide (CO 2 ) concentration, and median particle size diameter measurements were taken into account. These parameters were analyzed in a computer classroom with 15 subjects during a normal 90-minute class; all the subjects wore surgical masks. For measurements, Arduino YUN, Arduino UNO, and APS-3321 devices were used. Natural ventilation efficiency was checked in two different ventilation scenarios: only windows open and windows and doors open. The results show how ventilation affects the temperature, CO 2 concentration, and median particle diameter size parameters. By contrast, the relative humidity depends more on the outdoor meteorological conditions. Both ventilation scenarios tend to create the same room conditions in terms of temperature, humidity, CO 2 concentration, and particle size. Additionally, the evolution of CO 2 concentration as well as the particle size distribution along the time was studied. Finally, the particulate matter (PM 2.5 ) was investigated together with particle concentration. Both parameters showed a similar trend during the time of the experiments.

Suggested Citation

  • Sergio A. Chillon & Mikel Millan & Iñigo Aramendia & Unai Fernandez-Gamiz & Ekaitz Zulueta & Xabier Mendaza-Sagastizabal, 2021. "Natural Ventilation Characterization in a Classroom under Different Scenarios," IJERPH, MDPI, vol. 18(10), pages 1-13, May.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:10:p:5425-:d:557680
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    References listed on IDEAS

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    2. Marta Baselga & Juan J. Alba & Alberto J. Schuhmacher, 2022. "The Control of Metabolic CO 2 in Public Transport as a Strategy to Reduce the Transmission of Respiratory Infectious Diseases," IJERPH, MDPI, vol. 19(11), pages 1-19, May.

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