The impact of retrofitted ventilation approaches on long-range airborne infection risk for lecture room environments: design stage methodology and application

Donovan, Adam; O’Sullivan, Paul

doi:10.1016/j.jobe.2023.106044

Cited by 3 publications

(1 citation statement)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among two current methods to assess airborne infection probability, the Wells-Riley model has proved to be more effective than the doseresponse model (Rayegan et al, 2022). The Wells-Riley equation can be used to initially estimate the overall infection risk of enclosed spaces such as classrooms, office, buses and aircraft cabins (Dai & Zhao, 2020;Kurnitski et al, 2021;O'Donovan & O'Sullivan, 2023;Park et al, 2021). Computational Fluid Dynamics (CFD) has been used to further investigate the airborne dispersion and virus transmission in more details (Mohamadi & Fazeli, 2022).…”

Section: Introductionmentioning

confidence: 99%

CFD Assessment of COVID-19 Infection Risk in Naturally Ventilated Detached Houses

Tantasavasdi,

Rianngon,

Inprom

2024

NJEDP

View full text Add to dashboard Cite

The airborne nature of COVID-19 dispersion has considerably impacted architectural and ventilation system designs. This research studies the COVID-19 infection risk in typical naturally ventilated detached houses in Thailand. Influencing parameters include the opening size and location of the infected person. Computational Fluid Dynamic was used to simulate the virus spreading in major spaces including the master bedroom, a bedroom and the living room. The Wells-Riley equation was adopted to assess personal infection risk (Pp) and area infection risk (Pa) in 12 case setups. The results reveal that opening size affects more on Pa than Pp. Increasing the opening-to-floor ratio in the range of 0.03 to 0.28 will reduce the Pa and Pp ratios in the range of 0.03 to 0.13 and 0.01 to 0.12, respectively. The location of the source, however, impacts more on Pp than Pa ratios. It varies the trend of the infection risk in the range as high as 0.69 to 0.70 according to other factors including the location of other occupants and the outlet openings.

show abstract

Section: Introductionmentioning

confidence: 99%

CFD Assessment of COVID-19 Infection Risk in Naturally Ventilated Detached Houses

Tantasavasdi,

Rianngon,

Inprom

2024

NJEDP

View full text Add to dashboard Cite

show abstract

Effectiveness evaluation of owners’ driving force of residential buildings energy saving retrofit using ANP-FCE in China

Guo,

Hu,

2024

Environ Dev Sustain

View full text Add to dashboard Cite

Effect of Infectious Disease Risk Management on Indoor Environmental Quality in Lecture Rooms: Current Performance and Future Considerations

O’Donovan,

Delaney,

Ouvrard

et al. 2024

Sustainability

View full text Add to dashboard Cite

The global COVID-19 pandemic has resulted in significant and accelerated developments in ventilation practises, where the need to ventilate buildings has been put centre stage. Longer-term ventilation approaches are now more likely to utilise hybrid ventilation strategies to address the challenge of ensuring resilient indoor thermal environments that are carbon neutral while also minimising the risk of long-range airborne infectious spread of viral pathogens. In the short term, there are many existing buildings which may not undergo retrofit for some time, and consequently, risk mitigation strategies have been implemented in these buildings by utilising existing systems. This paper will present an indoor environmental quality evaluation of ten university lecture rooms both before, during and after changes in ventilation management behaviour and systems that were accelerated due to the COVID-19 pandemic. The results indicate a mean reduction in internal carbon dioxide levels of between 46% and 67% when pre-COVID-19 and COVID-19 datasets are compared and between 11% and 62% when pre-COVID-19 and post-COVID-19 datasets are compared. Changes in behaviour and systems have reduced the time spent above thresholds conducive to virus growth by between 8% and 54%, depending on the lecture room. Despite this, a “rebound” can be observed in many rooms, with CO2 levels appearing to be trending toward pre-pandemic levels. This work indicates the effect of behavioural and system changes on ventilation and the potential risk for virus spread. The results indicate a need to retrofit existing lecture rooms with more advanced natural or mechanical systems to ensure consistent indoor environmental quality.

show abstract

The impact of retrofitted ventilation approaches on long-range airborne infection risk for lecture room environments: design stage methodology and application

Cited by 3 publications

References 50 publications

CFD Assessment of COVID-19 Infection Risk in Naturally Ventilated Detached Houses

CFD Assessment of COVID-19 Infection Risk in Naturally Ventilated Detached Houses

Effectiveness evaluation of owners’ driving force of residential buildings energy saving retrofit using ANP-FCE in China

Effect of Infectious Disease Risk Management on Indoor Environmental Quality in Lecture Rooms: Current Performance and Future Considerations

Contact Info

Product

Resources

About