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Experimental Evaluation of Intermittent Air Jet Ventilation Strategy: Cooling effect and the associated energy saving
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering. Center for the Built Environment, University of California, Berkeley, Berkeley CA, USA. (Energy Systems)ORCID iD: 0000-0002-2171-3013
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering. (Energy Systems)
2016 (English)Conference paper (Refereed)
Abstract [en]

The potential to reduce building energy demand is high especially on building services like ventilation and air conditioning. This potential lies in identifying ventilation strategies that can provide both the required indoor climate and lower the energy use. One of the strategies is optimizing elevated air movements to enhance human convective and evaporative cooling which, as shown in literature, results in reduced energy use on cooling. This paper evaluates the cooling potential and the resulting energy saving of a novel air supply system called intermittent air jet strategy (IAJS). As shown in this study, IAJS with velocities of 0.4 m/s at the breathing height provides a cooling effect equivalent to reducing the ambient temperature in a mixing ventilation system by up to 1.5 oC to achieve a neutral sensation. This translates to a 13% reduction on the cooling demand. The strategy is also shown to have an energy saving potential of up to 50% on the supply fan. 

Place, publisher, year, edition, pages
2016.
Keyword [en]
Convective cooling, Equivalent temperature, Cooling power, Thermal manikin, Energy saving, High occupant density
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:hig:diva-22179OAI: oai:DiVA.org:hig-22179DiVA: diva2:950150
Conference
Indoor Air 2016, The 14th International Conference on Indoor Air Quality and Climate, Ghent, Belgium, July 2-9, 2016
Available from: 2016-07-28 Created: 2016-07-28 Last updated: 2016-08-16Bibliographically approved

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