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A Study on the Effectiveness of Alternative Commercial Ventilation Inlets that Improve Energy Efficiency of Building Ventilation Systems

Considine, Brian, McNabola, Aonghus, Gallagher, John and Kumar, Prashant (2020) A Study on the Effectiveness of Alternative Commercial Ventilation Inlets that Improve Energy Efficiency of Building Ventilation Systems In: ICUAQMET 2020: 14. International Conference on Urban Air Quality Management, Environment and Technology, 17-18 Sep 2020, Dublin, Ireland.

ICUAQMET Full Conference paper.pdf - Accepted version Manuscript

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Passive air pollution control devices known as aspiration efficiency reducers (AER) have been developed using aspiration efficiency (AE) concepts. Their purpose is to reduce the concentration of particulate matter (PM) drawn into a building air handling unit (AHU) through alterations in the inlet design improving energy consumption. In this paper an examination is conducted into the effect of installing a deflector system around an AER-AHU inlet for both a forward and rear-facing orientations relative to the wind. The results of the study found that these deflectors are an effective passive control method for reducing AE at various ambient wind speeds over a range of microparticles of varying diameter. The deflector system was found to induce a large wake zone at low ambient wind speeds for a rear-facing AER-AHU, resulting in significantly lower AE in comparison to without. As the wind speed increased, both contained a wake zone but have much lower concentration gradients with the deflectors. For the forward-facing models, the deflector system at low ambient wind speed was preferred at higher Stokes numbers but there was negligible difference as the Stokes number decreased. Similarly, there was no significant difference at higher wind speeds across the Stokes number range tested. The above results demonstrate that a deflector system is a viable passive control method for the reduction of ventilation energy consumption.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
Considine, Brian
McNabola, Aonghus
Gallagher, John
Date : 2020
Funders : Sustainable Energy Authority of Ireland (SEAI)
Copyright Disclaimer : © 2020 The authors.
Uncontrolled Keywords : Aspiration efficiency; Energy; Particulate matter; Ventilation
Related URLs :
Depositing User : Clive Harris
Date Deposited : 17 Aug 2020 16:06
Last Modified : 17 Sep 2020 02:08

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