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Experimental evaluation of an intermittent air supply system – Part 2: Occupant perception of thermal climate
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Energy system.ORCID iD: 0000-0002-2171-3013
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Energy system.
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Environmental psychology.
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Environmental psychology.
2016 (English)In: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 108, 99-109 p.Article in journal (Refereed) Published
Abstract [en]

A newly proposed intermittent air jet strategy (IAJS) provides satisfactory indoor climate while promising a substantial energy saving potential, as shown in technical (objective) measurements. The strategy creates non-uniform airflow and non-isothermal conditions critical for sedentary operations at elevated temperatures. The current study explored human perception of thermal environment under an IAJS. Assessment of thermal sensation, thermal comfort, and thermal acceptability were collected based on responses from 36 participants. Participants sat in a classroom setup and performed sedentary work. Their clothing had an insulation of 0.51 clo (T-shirt on upper body). Participants were exposed to homogeneous (v < 0.15 m/s) and nonhomogeneous (0.4 m/s < v < 0.8 m/s) velocity conditions across three temperature conditions: 22.5 °C, 25.5 °C and 28.5 °C. The participants found air speeds to be undesirable at lower temperatures, but reported an improved thermal sensation, comfort and acceptability at higher temperatures. As shown here, IAJS generated neutral operable conditions between 24.8 °C and 27.8 °C, within an air speed range of 0.4 m/s to 0.8 m/s. Additionally, air movements induced thermal alliethesia resulting in improved comfort and acceptance of the thermal climate even at lower air speeds in warm temperature conditions. Hence, the current study supports the energy saving potential with IAJS in view of the human perception of the indoor environment.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 108, 99-109 p.
Keyword [en]
Intermittent air jets, Convective cooling, Thermal comfort, Thermal acceptability, Thermal preference, Thermal satisfaction
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:hig:diva-22336DOI: 10.1016/j.buildenv.2016.08.025ISI: 000385324300009ScopusID: 2-s2.0-84984810423OAI: oai:DiVA.org:hig-22336DiVA: diva2:957055
Available from: 2016-08-31 Created: 2016-08-31 Last updated: 2017-01-13Bibliographically approved

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Kabanshi, AlanWigö, HansLjung, RobertSörqvist, Patrik
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