Impinging jet – A new ventilation strategy for industries: a case study of a light alloy foundry
2009 (English)In: Proceedings of the 9th international conference on industrial ventilation (Ventilation 2009), ETH Zürich Switzerland, October 18-21, 2009., 2009Conference paper (Refereed)
This paper present results from a test implementation of a impinging jet (IJ) ventilation system in a foundry facility in Sweden. The studied object is a light alloy casting facility, where aluminium and magnesium is processed. The aim of the paper is to present results from the implementation of this impinging jet (IJ) ventilation system. However, the paper also contains a comparison with the previously used displacement ventilation system. The comparison is made it terms of contaminant removal efficiency and thermal comfort parameters, and includes measurements and computational fluid dynamic (CFD) predictions of contaminants in the air as well as the temperature and velocity field in the facility. The CFD predictions is made using a commercial code, Fluent, and uses the renormalized group k-e (RNG) turbulence model with a standard wall function (SWF). It is shown that the predictions are in good agreement with measured values of the temperature and velocity field in the facility. Furthermore, the results show that the IJ system has a higher efficiency in terms of contaminant removal, especially far field from the supply device, which is expected due to the higher supply momentum when compared with displacement systems. In terms of draught rating, the area where there is a risk of draught is larger, but this is less of a problem for this particular facility with high thermal loads and where workers are entitled to wear heavy protective clothing. This is also supported by the results from the PPD predictions in the facility. Together this shows that the IJ system may be a viable option for this kind of special environment.
Place, publisher, year, edition, pages
Industrial Ventilation, impinging jet ventilation, CFD, field measurements, numerical simulation
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-62629OAI: oai:DiVA.org:liu-62629DiVA: diva2:373651