Acceptable indoor air quality at reduced energy consumption for high-occupancy buildings with intermittent operation

Budaiwi, I.; Mohammed, Mohammed Alhaji

doi:10.1080/00038628.2023.2199705

Cited by 2 publications

(3 citation statements)

References 81 publications

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“…The doors in the office were mostly open during working hours. Furthermore, the classroom was occupied 4 times a week (15,16,18,20 May).…”

Section: Model Validationmentioning

confidence: 99%

“…Another study was conducted on an office building in Trondheim, Norway, focusing on the PM 2.5 pollution of the building by utilizing the CONTAM and EnergyPlus cosimulation [17]. Additionally, Budaiwi and Mohammed [18] employed CONTAM to assess energy efficiency techniques in a mosque and an auditorium while ensuring acceptable IAQ levels. The study examined CO 2 and formaldehyde (HCHO) as pollutants to evaluate IAQ.…”

Section: Introductionmentioning

confidence: 99%

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Multi-Zonal Analysis of Indoor Air Quality in a Higher Educational Building in the UK

et al. 2023

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This study focuses on the indoor air quality (IAQ) in a higher educational building, the London College in the UK. In this regard, indoor CO2 levels, as well as three contaminants with detrimental effects on human health: NO2, PM2.5, and SARS-CoV-2, are investigated. Various IAQ enhancement strategies are analyzed, including increased ventilation, background ventilation, improved airflow through opened doors, and the use of HEPA air cleaners. Results revealed that background ventilation and open doors during occupied periods reduced CO2 concentrations to around 1000 ppm. However, the effectiveness of background ventilation was influenced by outdoor conditions, such as wind speed and direction. The most effective method for reducing PM2.5 levels was installing an air cleaner alongside a commercial kitchen hood, resulting in a 15% greater reduction compared to background ventilation. To control the SARS-CoV-2 level, combining background ventilation or opening the doors with a 16,000 m3/h ventilation rate or using an air cleaner with baseline ventilation resulted in a basic reproductive number below 1. Overall, the research highlights the importance of background ventilation and open doors in enclosed spaces without operable windows for natural airflow. Additionally, the effectiveness of air purifiers in reducing particle and biological contaminant concentrations is demonstrated, providing valuable insights for improving IAQ in educational buildings.

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“…The doors in the office were mostly open during working hours. Furthermore, the classroom was occupied 4 times a week (15,16,18,20 May).…”

Section: Model Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-Zonal Analysis of Indoor Air Quality in a Higher Educational Building in the UK

et al. 2023

View full text Add to dashboard Cite

show abstract

“…In Trondheim, Norway, a study on an office building focused on PM 2.5 pollution using CONTAM and EnergyPlus co-simulation [18]. Budaiwi and Mohammed [19] utilized CONTAM to assess energy efficiency techniques in a mosque and an auditorium, evaluating IAQ based on pollutants like CO 2 and formaldehyde (HCHO).…”

Section: Introductionmentioning

confidence: 99%

Enhancing Indoor Air Quality and Regulatory Compliance: An In-Depth Comparative Study on Ventilation Strategies and Their Impact on SARS-CoV-2 Transmission Risk

Abbaspour,

Bahadori-Jahromi,

Janbey

et al. 2023

Sustainability

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Enclosed-space ventilation plays a pivotal role in enhancing indoor air quality (IAQ). Various regulations and guidelines determine minimum fresh air requirements, varying by the application, country, etc. The present study employs real-time indoor CO2 measurements to calculate the actual air change rate (ACH) and models the building’s compliance with Chartered Institution of Building Services Engineers (CIBSE) guidelines to assess its impact on IAQ. The contaminant considered is the SARS-CoV-2 virus with multiple infectors, and the study calculates the virus’s transmission risk under different scenarios. Fresh air is assumed to be provided by mechanical or hybrid ventilation. The results reveal that the current building conditions are unacceptable, showing a significant gap from the recommended guideline rates. Meeting CIBSE recommendations ensures indoor air safety in terms of CO2 concentration. However, in extreme conditions with five infectors, findings show a 14% reduction in mechanical ventilation efficacy. Among the hybrid ventilation scenarios, combining CIBSE rates with natural ventilation, with a 30% door and window opening from the class outset, proves most effective in reducing the virus’s transmission risk, with a 58–70% reduction from the building’s current condition. Furthermore, implementing supplementary measures like air cleaners resulted in an additional 28–50% reduction in transmission risk.

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Acceptable indoor air quality at reduced energy consumption for high-occupancy buildings with intermittent operation

Cited by 2 publications

References 81 publications

Multi-Zonal Analysis of Indoor Air Quality in a Higher Educational Building in the UK

Multi-Zonal Analysis of Indoor Air Quality in a Higher Educational Building in the UK

Enhancing Indoor Air Quality and Regulatory Compliance: An In-Depth Comparative Study on Ventilation Strategies and Their Impact on SARS-CoV-2 Transmission Risk

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