Ventilation rates in schools and pupils’ performance

Bakó-Biró, Zs.; Clements‐Croome, Derek; Kochhar, Neena; Awbi, Hazim; Williams, Mechelle

doi:10.1016/j.buildenv.2011.08.018

Cited by 448 publications

(334 citation statements)

References 14 publications

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“…8 AM-8 PM). The geometric mean of CO 2 concentration levels was typically below the maximum allowed classroom concentration level of 1000 ppm [40]. Figure 6 depicts variations in WiFi counts, the number of occupants and CO 2 concentration levels between 8 AM and 8 PM over every weekday.…”

Section: Resultsmentioning

confidence: 99%

Effectiveness of using WiFi technologies to detect and predict building occupancy

et al. 2017

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Abstract. This paper presents findings of a case-study demonstrating the effectiveness of using WiFi networks to detect occupancy as opposed to CO 2 sensors, commonly used for demand-controlled heating, ventilation and air conditioning (HVAC) systems. The study took place in one building at the University of Manitoba Fort Garry campus in Canada. In a classroom, the number of WiFi connections was collected on an hourly basis over one-week, simultaneously with CO 2 concentration levels at 10-min intervals. The number of occupants in this classroom was also counted on an hourly basis over the same study period. Data analysis showed that WiFi counts predicted actual occupancy levels more accurately than CO 2 concentration levels, thus validating the use of this technology to track occupancy. This study was the first to use both CO 2 concentration and WiFi counts simultaneously as indicators for occupancy. Results demonstrated the possibility of using WiFi counts in large buildings for controlling HVAC systems at a higher accuracy and lower cost than other sensor technologies. Implications and influences: Given the large contribution of HVAC systems to overall buildings' energy consumption, this study presents a new method for efficiently operating HVAC systems. Results highlighted the accuracy of using WiFi connections as predictors for occupancy patterns to be used for controlling HVAC systems instead of CO 2 sensors. These findings provide a foundation for further research on using WiFi networks to manage and operate HVAC systems in new buildings. Efficient operation of these systems based on real-time occupancy as opposed to static schedules provides facility managers with an opportunity for significant energy savings at a relatively low cost.Keywords: buildings energy management / occupancy and energy consumption / smart buildings systems / green buildings / sensor-based HVAC systems

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Section: Resultsmentioning

confidence: 99%

Effectiveness of using WiFi technologies to detect and predict building occupancy

et al. 2017

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“…This problem has also been verified in the European countries [6]. Students' and teachers' performance under poor IAQ conditions have been recently explored [7], [8] and a notably increased student absenteeism has been verified as a consequence. For a proper learning environment, school buildings require proper indoor comfort conditions, including thermal comfort, indoor air quality (IAQ), adequate lighting conditions and a quiet atmosphere.…”

Section: Introductionmentioning

confidence: 85%

Indoor Air Quality and Thermal Comfort Assessment of Two Portuguese Secondary Schools: Main Results

Pereira

Neto

Silva

2014

Proceedings of REHVA Annual Conference "Advanced HVAC and Natural Gas Technologies"

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-The results of the field study about indoor thermal comfort in two of the involved schools of the 3Es project are presented. The thermal comfort and indoor air quality assessment was conducted by monitoring physical parameters and survey questionnaires. The subjective assessment shows that the students found temperature range beyond the comfort zone acceptable, and revealed the occupants' accommodation to CO2 exposure. The CO2 exceeding values exposed that IAQ is a problem and action should be taken to promote CO2 dilution when HVAC systems are not active.

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“…A ventilação adequada também desempenha um papel importante na manutenção do conforto térmico de um ambiente 13 . Além disso, salas de aula com pouca ventilação e, consequentemente, com baixa qualidade de ar (elevada concentração de CO 2 ), prejudicam o ensino e a aprendizagem, pois reduzem a atenção dos alunos, afetando negativamente a memória e a concentração 33 . Portanto, o uso de sistemas avançados de ventilação baseados na integração de estratégias básicas de ventilação natural, como o uso da ventilação cruzada, por exemplo, têm sido considerados elementos sustentáveis importantes na melhoria do conforto…”

Section: Sustentabilidade No Espaço Escolarunclassified

Otimização Do Conforto Ambiental No Espaço Escolar: Uma Visão Sustentável

2015

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ARTIGO DE REVISÃO Páginas 01 de 05 não para fins de citação RESUMOPráticas sustentáveis no espaço escolar são ações importantes que visam à redução do consumo energéti-co e de recursos naturais, as quais podem melhorar as condições de conforto ambiental de salas de aula, auxiliando no rendimento escolar e diminuindo riscos à saúde dos escolares. Objetivo: revisar práticas arquitetônicas sustentáveis que possibilitem otimizar as condições de conforto visual, térmico e acústico no espaço escolar. Resultados: com base na literatura, constata-se que a utilização da iluminação natural é uma das ferramentas sustentáveis mais importantes para melhorar o conforto visual em salas de aula. Para melhorar o conforto térmico, estratégias básicas de ventilação natural são fundamentais. A utilização de materiais naturais ou reciclados é uma alternativa aos materiais tradicionais para melhorar o conforto acústico. Considerações finais: a utilização de estratégias adequadas na concepção do projeto arquitetônico ou reestruturação de espaços construídos, bem como recorrer a materiais alternativos, melhoram o conforto ambiental de salas de aula e reduzem o impacto ambiental.

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Ventilation rates in schools and pupils’ performance

Cited by 448 publications

References 14 publications

Effectiveness of using WiFi technologies to detect and predict building occupancy

Effectiveness of using WiFi technologies to detect and predict building occupancy

Indoor Air Quality and Thermal Comfort Assessment of Two Portuguese Secondary Schools: Main Results

Otimização Do Conforto Ambiental No Espaço Escolar: Uma Visão Sustentável

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