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Experimental Investigation of Ventilation Performance of Different Air Distribution Systems in an Office Environment: Heating Mode
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology. (Energisystem)ORCID iD: 0000-0002-8349-6659
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology. (Energisystem)ORCID iD: 0000-0003-2023-689x
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology. (Energisystem)ORCID iD: 0000-0003-3877-6827
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology. (Energisystem)ORCID iD: 0000-0002-9392-424x
2019 (English)In: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 12, no 10, article id 1835Article in journal (Refereed) Published
Abstract [en]

A vital requirement for all-air ventilation systems are their functionality to operate both in cooling and heating mode. This article experimentally investigates two newly designed air distribution systems, corner impinging jet (CIJV) and hybrid displacement ventilation (HDV) in comparison against a mixing type air distribution system. These three different systems are examined and compared to one another to evaluate their performance based on local thermal comfort and ventilation effectiveness when operating in heating mode. The evaluated test room is an office environment with two workstations. One of the office walls, which has three windows, faces a cold climate chamber. The results show that CIJV and HDV perform similar to a mixing ventilation in terms of ventilation effectiveness close to the workstations. As for local thermal comfort evaluation, the results show a small advantage for CIJV in the occupied zone. Comparing C2-CIJV to C2-CMV the average draught rate (DR) in the occupied zone is 0.3% for C2-CIJV and 5.3% for C2-CMV with the highest difference reaching as high as 10% at the height of 1.7 m. The results indicate that these systems can perform as well as mixing ventilation when used in offices that require moderate heating. The results also show that downdraught from the windows greatly impacts on the overall airflow and temperature pattern in the room.

Place, publisher, year, edition, pages
2019. Vol. 12, no 10, article id 1835
Keywords [en]
Corner impinging jet, mixing ventilation, displacement ventilation, tracer gas, air exchange effectiveness, air change effectiveness, draught rate
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:hig:diva-29582DOI: 10.3390/en12101835ISI: 000471016700014Scopus ID: 2-s2.0-85066877057OAI: oai:DiVA.org:hig-29582DiVA, id: diva2:1317010
Note

Funding agency:

- University of Gävle

Available from: 2019-05-21 Created: 2019-05-21 Last updated: 2019-08-23Bibliographically approved

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Ameen, ArmanCehlin, MathiasLarsson, UlfKarimipanah, Taghi

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