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Experimental and numerical investigations of a new ventilation supply device based on confluent jets
Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Energisystem.
Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Energisystem.ORCID-id: 0000-0003-2023-689x
Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Energisystem.ORCID-id: 0000-0003-3472-4210
2018 (engelsk)Inngår i: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 137, s. 18-33Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In developed countries, heating, ventilation, air conditioning (HVAC) systems account for more than 10% of national energy use. The primary function of a HVAC system is to create proper indoor environment. A number of ventilation strategies have been developed to minimize HVAC systems’ energy use whilst still maintaining a good indoor environment. Among these strategies are confluent jet ventilation and variable air volume. In this study, an air supply device with a novel nozzle design that uses both of the above-mentioned strategies was investigated both experimentally and numerically at three different airflow rates. The results from the numerical investigation using the SST k - ω turbulence model regarding velocities and flow patterns are validated by experimental data carried out by Laser Doppler Anemometry. The results from both studies show that the flow pattern and velocity in each nozzle is directly dependent on the total airflow rate. However, the flow pattern does not vary between the three different airflow rates. The numerical investigation shows that velocity profiles for each nozzle have the same pattern regardless of the airflow rate, but the magnitude of the velocity profile increases as the airflow increases. Thus, a supply device of this kind could be used for variable air volume and produce confluent jets for the airflow rates investigated.

sted, utgiver, år, opplag, sider
2018. Vol. 137, s. 18-33
Emneord [en]
Confluent jets, Laser Doppler anemometry, SST k, Validation study, Ventilation supply device, ω turbulence model
HSV kategori
Identifikatorer
URN: urn:nbn:se:hig:diva-26571DOI: 10.1016/j.buildenv.2018.03.038ISI: 000433649700003Scopus ID: 2-s2.0-85044917956OAI: oai:DiVA.org:hig-26571DiVA, id: diva2:1205870
Forskningsfinansiär
Knowledge Foundation
Merknad

Funding: University of Gavle, Repus Ventilation AB and the Knowledge Foundation

Tilgjengelig fra: 2018-05-15 Laget: 2018-05-15 Sist oppdatert: 2019-02-13bibliografisk kontrollert
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