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Indoor airflow interactions with symmetrical and asymmetrical heat load distributions under diffuse ceiling ventilation

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Lestinen, Sami
dc.contributor.author Kilpeläinen, Simo
dc.contributor.author Kosonen, Risto
dc.contributor.author Jokisalo, Juha
dc.contributor.author Koskela, Hannu
dc.contributor.author Li, Angui
dc.contributor.author Cao, Guangyu
dc.date.accessioned 2019-06-03T14:14:30Z
dc.date.available 2019-06-03T14:14:30Z
dc.date.issued 2019-07-03
dc.identifier.citation Lestinen , S , Kilpeläinen , S , Kosonen , R , Jokisalo , J , Koskela , H , Li , A & Cao , G 2019 , ' Indoor airflow interactions with symmetrical and asymmetrical heat load distributions under diffuse ceiling ventilation ' , Science and Technology for the Built Environment , vol. 25 , no. 6 , pp. 716-731 . https://doi.org/10.1080/23744731.2019.1588029 en
dc.identifier.issn 2374-4731
dc.identifier.issn 2374-474X
dc.identifier.other PURE UUID: 7924abac-ebcb-417f-9a15-6024f0b77c06
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/7924abac-ebcb-417f-9a15-6024f0b77c06
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85065316660&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/41562284/ENG_Lestinen_et_al_Indoor_airflow_interactions_Science_and_Technology_for_the_Built_Environment.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/38295
dc.description.abstract Heat load distribution and supply air jets have a major effect on indoor airflow patterns, which may cause local thermal discomfort. In this study, heat load distribution was studied at the heat load strength of 40 W/floor-m2 and 80 W/floor-m2 with diffuse ceiling ventilation. Experimental measurements were carried out in a test chamber of 5.5 x 3.8 x 3.2 m3 by using omnidirectional anemometers and long averaging time. Indoor air temperature of the test chamber was 26 ± 0.5 °C. In the symmetrical setup, cylindrical heat sources were located evenly on the floor. In the asymmetrical setup, two workstations were located near windows. This study recommends the reduction of buoyancy and momentum driven flows in the occupied zone. In a symmetrical setup, the local draft rate exceeded 10% in at least one height from all the measured locations and the heat load strengths in the occupied zone. In an asymmetrical setup, 47% of the measured locations exceeded 10% at 40 W/floor-m2 and 87% at 80 W/floor-m2, correspondingly. Thus, the thermal environment was classified as category B for 40 W/floor-m2 and category C for 80 W/floor-m2 according to EN ISO 7730 standard (CEN 2005 CEN. 2005. European Standard EN ISO 7730:2005. Ergonomics of the thermal environment — Analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal comfort criteria. Brussels, Belgium: CEN. [Google Scholar]). Spatial differences increased with the asymmetrical setup compared to the symmetrical one, and those differences increased with an increase in the heat load. en
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Taylor and Francis Ltd.
dc.relation.ispartofseries Science and Technology for the Built Environment en
dc.rights openAccess en
dc.title Indoor airflow interactions with symmetrical and asymmetrical heat load distributions under diffuse ceiling ventilation en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Mechanical Engineering
dc.contributor.department Energy efficiency and systems
dc.contributor.department Turku University of Applied Sciences
dc.contributor.department Xi'an University of Architecture and Technology
dc.contributor.department Norwegian University of Science and Technology
dc.identifier.urn URN:NBN:fi:aalto-201906033380
dc.identifier.doi 10.1080/23744731.2019.1588029
dc.date.embargo info:eu-repo/date/embargoEnd/2020-05-07

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