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Comparing the performance of a combined confluent jets, windows façade supply device and active chilled beam air distribution systems in an office
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science.
2019 (English)Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

As temperatures rise around the world and people work more hours throughout the day, the necessity for a comfortable work environment and better thermal comfort has increased. Ventilation systems might have an impact on workers’ health in relation to providing suitable levels of indoor air quality and thermal comfort. Thereby, the purpose of this research was to test different existing installations in an office by taking measures and carrying out a questionnaire to the office staff, so the performance of the systems and the thermal comfort provided could be evaluated. The investigated systems were: wall confluent jets supply device, windows façade supply device and active chilled beams.

The results show that the mean room temperature from both confluent jets ventilation (CJV) and façade-integrated displacement ventilation (FIDV) is higher than with the mixing ventilation with active chilled beams. Also the maximum temperature difference between neck level and ankle level was lower with the active chilled beams (ACB) system. Nevertheless, the draught rate was higher for the chilled beams. In addition to the fact that the mixing ventilation (MV) systems have the drawback of mixing contaminated air with the fresh air supplied, which can lead to lower performance and diseases for the occupants.

For the office studied, results confirm that the CJV provides better overall ventilation performance than the mixing and displacement supply devices used in this study, as it combines the positive effects of both mixing and stratification principles.

Place, publisher, year, edition, pages
2019. , p. 101
Keywords [en]
Ventilation system; Supply device; Thermal comfort; Confluent jets; Active chilled beam; Façade; Mixing ventilation; Displacement ventilation
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:hig:diva-30390OAI: oai:DiVA.org:hig-30390DiVA, id: diva2:1334376
Subject / course
Energy systems
Educational program
Energy systems – master’s programme (one year) (swe or eng)
Presentation
2019-06-04, 09:30 (English)
Supervisors
Examiners
Available from: 2019-08-08 Created: 2019-07-02 Last updated: 2019-08-08Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard-cite-them-right
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • sv-SE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • de-DE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf