Murat Mustafa
Enhancing non-domestic Passivhaus auditoria ventilation design for improved indoor environmental quality
Mustafa, Murat; Cook, Malcolm J.; McLeod, Robert S.
Authors
Malcolm J. Cook
Robert S. McLeod
Abstract
Enhanced energy conservation strategies often involve tightly controlled ventilation flow rates. However, strategies that don't carefully consider ventilation rates can, in certain contexts, result in inadequate ventilation, with increased risks of poor indoor environmental quality and user acceptance. These design challenges are often exacerbated in non-domestic buildings with highly dynamic occupancy patterns. This study used computational fluid dynamics, supported by field measurements, to investigate the relationship between zonal supply air strategies and thermal comfort in the George Davies Centre, Leicester University, which is the largest non-domestic certified Passivhaus building in the UK. Ventilation strategies involving mechanical ventilation operating with heat recovery turned on and off, and natural ventilation systems were investigated in relation to their ability to maintain thermal comfort in an auditorium space characterised by high internal heat gains and tiered seating. The results show that, depending on the selected thermal comfort criterion, a thermally comfortable environment could be achieved when incoming air is in the range of 9–26 °C for mechanical ventilation with heat recovery and 17–29 °C for natural ventilation. These temperatures are referred to as ‘limiting operating temperatures’ in the paper. The work showed that in a temperate climate, thermal comfort could be maintained, for up to 80% of the year, using mixed mode ventilation, without space conditioning, in combination with intelligent design and control strategies. Operating in natural ventilation mode also provided increased fresh air supply capacity, a finding which is particularly relevant in the context of mitigating airborne viral transmission.
Journal Article Type | Article |
---|---|
Acceptance Date | Mar 11, 2023 |
Online Publication Date | Mar 15, 2023 |
Publication Date | Apr 15, 2023 |
Deposit Date | Mar 23, 2023 |
Publicly Available Date | Mar 23, 2023 |
Journal | Building and Environment |
Print ISSN | 0360-1323 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 234 |
Article Number | 110202 |
DOI | https://doi.org/10.1016/j.buildenv.2023.110202 |
Keywords | CFD; Auditorium ventilation; Thermal comfort; nZEB; IEQ; Overheating |
Public URL | https://uwe-repository.worktribe.com/output/10579124 |
Publisher URL | https://www.sciencedirect.com/science/article/pii/S0360132323002299?via%3Dihub |
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Enhancing non-domestic Passivhaus auditoria ventilation design for improved indoor environmental quality
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Licence
http://creativecommons.org/licenses/by/4.0/
Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/
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