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Volume 4, Issue 2, April 2016, Page: 24-42
Experimental and Numerical Study of Air Flow Diffusion and Contaminants Circulation in Room Ventilation Related with Iraqi Climate
Alaa Abbas Mahdi, Mechanical Department, College of Engineering, University of Babylon, Babylon, Iraq
Alaa Abbas Mahdi, Mechanical Department, College of Engineering, University of Babylon, Babylon, Iraq
Received: Feb. 13, 2016;       Accepted: Feb. 25, 2016;       Published: Mar. 7, 2016
DOI: 10.11648/j.ijmea.20160402.11      View  5693      Downloads  299
Abstract
Illnesses of many indoor air quality problems occur in office room. Ventilation is one way to control the contaminant transport and to provide better indoor air quality with in the office. In the evaluation of indoor air quality, CO2 concentration is regarded as a good indicator to estimate the air quality level and to assess the performance of a mechanical ventilation system used by many designers, So the CO2 concentration was used as the tracer gas in this study, also the humans respiration taken into account as CO2 sources were the rate of production of carbon dioxide (CO2) by human respiration. Experimental measurement and computational fluid dynamics (CFD) simulation methods were applied. The results from this study show that the floor-supply displacement ventilation can improve indoor air quality because the pollutant concentration in the breathing zone is lower than that of mixing system and the risk of cross contamination can be effectively reduced. Nevertheless, the indoor spaces with floor-supply displacement ventilation might have a higher risk of discomfort, because of high temperature stratification between the ankle and head levels when compared to traditional mixing ventilation. The results indicated that the contaminant distribution in a mechanically ventilated office room need to be studied individually according to different cases.
Keywords
Mixing Ventilation (MV), Displacement Ventilation (DV), Computational Fluid- Dynamics, Thermal Comfort, Indoor Air Quality
To cite this article
Alaa Abbas Mahdi, Alaa Abbas Mahdi, Experimental and Numerical Study of Air Flow Diffusion and Contaminants Circulation in Room Ventilation Related with Iraqi Climate, International Journal of Mechanical Engineering and Applications. Vol. 4, No. 2, 2016, pp. 24-42. doi: 10.11648/j.ijmea.20160402.11
Copyright
Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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