Improvement of indoor air quality by way of using decentralised ventilation

Zender–Świercz, Ewa

doi:10.1016/j.jobe.2020.101663

Cited by 24 publications

(20 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reduction of CO2 concentration was also confirmed by others in their studies [142]. On the other hand, the analysis [110] of the influence of the supply/exhaust cycle length on the CO2 concentration showed that for each cycle length, throughout the entire measurement period the carbon dioxide concentration did not exceed the value of 800 ppm, which means that the premises met the requirements of ASHRAE [1] regarding air The analysis of the air exchanges achieved by the unit with a dampers system [135] showed that, for both the 2-min supply/exhaust time and the 10-min time, the air exchange was sufficient for an office premise. In addition, the analysis of changes in the mean value of carbon dioxide concentration over a 30-min period showed reductions in the analysed parameter ( Figure 9).…”

Section: Façade Decentralised Ventilationsupporting

confidence: 59%

“…In the case of devices with a reversible fan, at various air flow velocities, a sufficient reduction of CO2 concentration was observed (Figure 8) to ensure an appropriate IAQ [138]. The analysis of the air exchanges achieved by the unit with a dampers system [135] showed that, for both the 2-min supply/exhaust time and the 10-min time, the air exchange was sufficient for an office premise. In addition, the analysis of changes in the mean value of carbon dioxide concentration over a 30-min period showed reductions in the analysed parameter ( Figure 9).…”

Section: Façade Decentralised Ventilationmentioning

confidence: 95%

“…In the second case, we have systems with a reversible fan, that alternately in one cycle supplies the air, and in the next cycle exhausts the air to the outside [134] (Figure 6). Another solution are devices with which the cyclical supply and exhaust are affected by changing the dampers system [110,135] (Figure 7). The authors, examining solutions without a heat recovery exchanger [136], indicated the need to heat the air due to the risk of Figure 5.…”

Section: Façade Decentralised Ventilationmentioning

confidence: 99%

See 2 more Smart Citations

Review of IAQ in Premises Equipped with Façade–Ventilation Systems

Zender–Świercz

2021

Atmosphere

View full text Add to dashboard Cite

Poor indoor air quality affects the health of the occupants of a given structure or building. It reduces the effectiveness of learning and work efficiency. Among many pollutants, PM 2.5 and 10 dusts are extremely important. They can be eliminated using mechanical ventilation equipped with filters. Façade ventilation devices are used as a way to improve indoor air quality (IAQ) in existing buildings. For their analysis, researchers used carbon dioxide as a tracer gas. They have shown that façade ventilation devices are an effective way to improve IAQ, but require further analysis due to the sensitivity of façade ventilation devices to the effects of wind and outdoor temperature. In addition, legal regulations in some countries require verification in order to enable the use of this type of solution as a way to improve IAQ in an era characterised by the effort to transform buildings into passive houses (standard for energy efficiency in a building).

show abstract

Section: Façade Decentralised Ventilationsupporting

confidence: 59%

Section: Façade Decentralised Ventilationmentioning

confidence: 95%

Section: Façade Decentralised Ventilationmentioning

confidence: 99%

See 1 more Smart Citation

Review of IAQ in Premises Equipped with Façade–Ventilation Systems

Zender–Świercz

2021

Atmosphere

View full text Add to dashboard Cite

show abstract

“…Both indoor and outdoor CO 2 concentrations were utilized to calculate the ventilation rates of the functional spaces. This method is popular to ascertain the ventilation condition [ [34] , [35] , [36] ]. It should be noted that the calculation is based on the assumption of well-mixed air in the space.…”

Section: Methodsmentioning

confidence: 99%

Study on ventilation rates and assessment of infection risks of COVID-19 in an outpatient building

Tang

2021

Journal of Building Engineering

View full text Add to dashboard Cite

A modified Wells-Riley model combining the airborne route and close contact route was proposed to predict the infection risks of coronavirus disease 2019 (COVID-19) in main functional spaces of an outpatient building in Shenzhen, China. The personnel densities and ventilation rates in the 20 waiting rooms, outpatient hall and hospital street were on-site measured. The average fresh air volume per person and occupant area per person in the 20 waiting rooms were 77.6 m 3 /h and 6.47 m 2 /per, satisfied with the Chinese standard. The average waiting time of the occupants was 0.69 h. Thus, assuming the proportion of infected people in the outpatient building was 2%, the daily average infection probabilities of COVID-19 in the 20 waiting rooms were 0.19–1.88% with a reasonable setting of the quanta produced by an infector ( q = 45 quanta/h) and the effective exposure dose of pathogen per unit close contact time ( β = 0.05 h −1 ). The design of the semi-closed hospital street with a height of 24 m improved its natural ventilation with a fresh air volume per person of 70–185 m 3 /h and further dilute the viral aerosol and decreased the infection risk to a negligible level (i.e., below 0.04% with an infector proportion of 2%). The assessment method provides real-time prediction of indoor infection risk and good assist in spread control of COVID-19.

show abstract

“…In the case of modernization of existing buildings to the passive house standard, the influence of hydraulic balancing of heating installations should also be taken into account [25] and the possibilities to increase the energy efficiency of domestic hot water preparation systems in existing buildings [26], as well as differences between planned and energy savings achieved [27]. In [28], the air quality in decentralised ventilation systems was shown, which can be applied in retrofitting existing buildings to the passive house standard. It was found to be efficient in reducing air pollution.…”

mentioning

confidence: 99%

Comprehensive Risk Management in Passive Buildings Projects

Krechowicz

Piotrowski²

2021

Energies

View full text Add to dashboard Cite

Nowadays, we can observe a growing interest in passive buildings due to global climate change, environmental concerns, and growing energy costs. However, developing a passive building is associated with meeting many Passive House requirements, which results in their increased complexity as well as many challenges and risks which could threaten the successful completion of the project. Risk management is a key tool enabling meeting today’s challenging passive house project’s demands connected with quality, costs, deadlines, and legal issues. In this paper, a new model of risk management dedicated for passive buildings based is proposed, in which a novel Fuzzy Fault Tree integrated with risk response matrix was developed. We proposed 171 risk remediation strategies for all 16 recognized risks in passive buildings projects. We show how to apply the proposed model in practice on one passive building example. Thanks to applying the proposed risk management model an effective reduction of the risks of the basic event is enabled, leading to a significant reduction of the top event risk. The proposed model is useful for architects, installation designers, contractors, and owners who are willing to develop attainable and successful passive buildings projects that benefit all stakeholders.

show abstract

Improvement of indoor air quality by way of using decentralised ventilation

Cited by 24 publications

References 21 publications

Review of IAQ in Premises Equipped with Façade–Ventilation Systems

Review of IAQ in Premises Equipped with Façade–Ventilation Systems

Study on ventilation rates and assessment of infection risks of COVID-19 in an outpatient building

Comprehensive Risk Management in Passive Buildings Projects

Contact Info

Product

Resources

About