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On the Performance of Diffuse Ceiling Ventilation in Classrooms: A Pre-Occupancy Study at a School in Southern Sweden
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology.
SG Ecophon AB, Box 500, 265 03 Hyllinge, Sweden.ORCID iD: 0000-0002-4947-4579
SG Ecophon AB, Box 500, 265 03 Hyllinge, Sweden.
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2023 (English)In: Sustainability, E-ISSN 2071-1050, Vol. 15, no 3, article id 2546Article in journal (Refereed) Published
Abstract [en]

The implementation and application of diffused ceiling ventilation (DCV) is gradually gaining momentum, especially in Denmark, Finland, and the Netherlands. In countries such as Sweden, the application is limited despite the favorable conditions for implementation. The current study investigates the performance of DCV and mixing ventilation in a pre-occupancy field study for newly renovated classrooms in Southern Sweden. Two classrooms at the school were installed with diffuse ceiling ventilation while the rest had mixing ventilation. The objective of the study was to compare and evaluate the ventilation performance in terms of indoor environmental quality parameters such as thermal comfort, air quality indexes, airflow, and temperature distribution. Pre-occupancy measurements were performed in two classrooms with similar room characteristics, with one room running under mixing ventilation and the other under DCV. Constant temperature anemometers, thermocouples, and INNOVA thermal comfort were used to measure the indoor air speeds, temperature, and thermal comfort, respectively. Tracer gas measurements, with SF6, were performed to assess air quality. Additionally acoustic measurements were conducted to assess the acoustic benefits of DCV on reducing ventilation noise. The results demonstrate that DCV offers similar indoor environmental conditions to mixing ventilation but has better acoustic performance especially on reducing the ventilation noise. Indoor environmental conditions were very homogeneous under DCV with mixing ventilation showing tendencies for short circuit ventilation. This study demonstrates that DCV has a potential for implementation in Swedish schools with minimal system modification on existing ventilation and air distribution systems.

Place, publisher, year, edition, pages
MDPI , 2023. Vol. 15, no 3, article id 2546
Keywords [en]
diffused ceiling ventilation; ventilation performance; indoor air quality; air distribution; classrooms
National Category
Civil Engineering
Research subject
Sustainable Urban Development
Identifiers
URN: urn:nbn:se:hig:diva-40984DOI: 10.3390/su15032546ISI: 000930378100001Scopus ID: 2-s2.0-85147884667OAI: oai:DiVA.org:hig-40984DiVA, id: diva2:1732958
Available from: 2023-02-01 Created: 2023-02-01 Last updated: 2023-03-09Bibliographically approved

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Linden, ElisabetMacCutcheon, DouglasKabanshi, Alan

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