Numerical investigation of ventilation performance of different air supply devices in an office environment
2015 (English)In: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 90, 37-50 p.Article in journal (Refereed) Published
The aim of this study was to compare ventilation performance of four different air supply devices in an office environment with respect to thermal comfort, ventilation efficiency and energy-saving potential, by performing numerical simulations. The devices have the acronyms: Mixing supply device (MSD), Wall confluent jets supply device (WCJSD), Impinging jet supply device (IJSD) and Displacement supply device (DSD). Comparisons were made under identical set-up conditions, as well as at the same occupied zone temperature of about 24.2°C achieved by adding different heat loads and using different air-flow rates. Energy-saving potential was addressed based on the air-flow rate and the related fan power required for obtaining a similar occupied zone temperature for each device. Results showed that the WCJSD and IJSD could provide an acceptable thermal environment while removing excess heat more efficiently than the MSD, as it combined the positive effects of both mixing and stratification principles. This benefit also meant that this devices required less fan power than the MSD for obtaining equivalent occupant zone temperature. The DSD showed a superior performance on heat removal, air exchange efficiency and energy saving to all other devices, but it had difficulties in providing acceptable vertical temperature gradient between the ankle and neck levels for a standing person.
Place, publisher, year, edition, pages
2015. Vol. 90, 37-50 p.
Air supply devices, Energy-saving potential, Thermal comfort, Ventilation performance, Air, Energy efficiency, Flow rate, Mixing, Ventilation, Air exchange efficiencies, Air supply, Energy saving potential, Numerical investigations, Thermal environment, Ventilation efficiency, Vertical temperature gradients, Energy conservation, building, computer simulation, indoor air, numerical method, performance assessment
Mechanical Engineering Building Technologies
IdentifiersURN: urn:nbn:se:hig:diva-19292DOI: 10.1016/j.buildenv.2015.03.021ISI: 000356189000004ScopusID: 2-s2.0-84926464708OAI: oai:DiVA.org:hig-19292DiVA: diva2:809840
FunderSwedish Research Council Formas, 242-2008-835Knowledge Foundation, 2007/0289