Indoor air quality, ventilation and their associations with sick building syndrome in Chinese homes

Sun, Yuexia; Cheng, Rongsai; Sheng, Ying; Zhang, Xinyu; Sundell, Jan

doi:10.1016/j.enbuild.2019.05.046

Cited by 122 publications

(90 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This problem attracted significant attention already in the 1990s, in particular in office buildings [53,54]. In recent years, factors that contribute to the SBS were also explored in residential buildings [55,56], schools [57] and lecture halls [58]. Symptoms of SBS have been more frequently reported in air-conditioned than in naturally ventilated premises.…”

Section: Mechanical Ventilationmentioning

confidence: 99%

The Applicability of Coanda Effect Hysteresis for Designing Unsteady Ventilation Systems

Skotnicka-Siepsiak

2020

Energies

View full text Add to dashboard Cite

Energy-saving ventilation systems are designed to improve the energy efficiency of buildings. Low energy efficiency in buildings poses a considerable problem that needs to be addressed. Mechanical ventilation with heat recovery has gained increased popularity in recent years. Mechanical ventilation has numerous advantages, including easy adjustment and control, high indoor air quality and elimination of indoor pollutants. Mixing ventilation is the most popular type of mechanical ventilation, in particular in residential buildings. Unsteady ventilation is a type of mixing ventilation that involves stronger mixing effects and smaller vertical temperature gradients to improve indoor air quality (IAQ) and minimize energy consumption. This study examines the possibility of controlling and modifying Coanda effect hysteresis (CEH) to generate unsteady flow and simulate the conditions of unsteady mixing ventilation. The experiment was performed on a self-designed test bench at the University of Warmia and Mazury in Olsztyn. It demonstrated that an auxiliary nozzle can be applied at the diffuser outlet to control CEH and the angles at which the air jet becomes attached to and separated from the flat plate positioned directly behind the nozzle. The study proposes an innovative mixing ventilation system that relies on CEH. The potential of the discussed concept has not been recognized or deployed in practice to date. This is the first study to confirm that an auxiliary nozzle by the diffuser outlet can be operated in both injection and suction mode to control CEH. In the future, the results can be used to design a new type of nozzles for unsteady ventilation systems that are based on CEH control.

show abstract

Section: Mechanical Ventilationmentioning

confidence: 99%

The Applicability of Coanda Effect Hysteresis for Designing Unsteady Ventilation Systems

Skotnicka-Siepsiak

2020

Energies

View full text Add to dashboard Cite

show abstract

“…Generally, higher concentrations of MVOCs are recorded in rooms, mainly due to closed space and often due to a problem with ventilation [57,71,72]. Various health issues may arise as a result of release of compounds by developing microorganisms [45,73]. On the other hand, mycotoxins are fungi-produced toxic substances.…”

Section: Harmful Effects Of Microbiological Contamination On Human Hementioning

confidence: 99%

Methods for Early Detection of Microbiological Infestation of Buildings Based on Gas Sensor Technologies

et al. 2020

View full text Add to dashboard Cite

In this review, the problem of microbiological infestation of buildings was discussed. The techniques of detection were described as well, with special attention drawn to the rapid-early detection methods based on gas sensor arrays. The physical and chemical conditions of the building environment conducive to the development of microorganisms and the technical conditions influencing the problem of microbiological infestation were investigated. Additionally, the harmful effects on human health caused by the microbiological contamination were discussed, with a short review of particular groups of microorganisms causing sick building syndrome. Among the detection techniques, the traditional microbiological techniques as well as the molecular and chemical methods were presented. Different designs of the gas sensor arrays together with the various techniques of analyzing the received multidimensional signal were described, analyzed, and compared in detail.

show abstract

“…Nowadays, air conditioning has become an essential feature in buildings to maintain thermally comfortable indoor conditions during working hours (Mustapa et al, 2016, Sun et al, 2019.…”

Section: Introductionmentioning

confidence: 99%

“…Poor Indoor Environmental Quality (IEQ) has been identified by researchers as a public health issue for years, which leads to widely publicized problems known as Sick Building Syndrome (SBS) and Building-Related Illness (BRI) (Yatim, 2002, Shahzad et al, 2016, Ghaffarianhoseini et al, 2018, Sun et al, 2019. IEQ could be further explained through four major environmental aspects namely Thermal Comfort (TC), Indoor Air Quality (IAQ), Acoustic Comfort (AC) and Visual Comfort (VC) (Oral et al, 2004, Corgnati et al, 2007, Mihai and Iordache, 2016.…”

Section: Introductionmentioning

confidence: 99%

Associations of Indoor Carbon Dioxide Concentration and Symptoms of Sick Building Syndrome in Air-Conditioned Lecture Halls

Jayasooriya

Rajapaksha

et al. 2020

Preprint

View full text Add to dashboard Cite

Indoor Carbon Dioxide (CO 2 ) concentrations and its impacts on health and wellbeing of the occupants is a widely discussed topic in building science. Although there is an abundance of knowledge on relationships between the Sick Building Syndrome (SBS) of office environments and naturally ventilated buildings, there is yet a limited knowledge available on associations’ of SBS in the students of higher educational facilities especially in air-conditioned lecture halls. To fill this research gap, present study has analyzed indoor CO 2 levels of 5 air-conditioned lecture halls with varying occupant densities for ongoing lectures of 2 hours. Statistically significant (α<0.05) strong positive correlation (R= 0.856) was shown between the occupant density and the CO 2 levels of the selected lecture halls. The results from the ordinal logistic regression shows significant odds ratios (OR>1, at 95% confidence interval) for the prevalence of symptoms such as headache, difficulties in concentration, dry throat, cough and tiredness/lethargy for certain lecture halls with high occupant densities. The results of the present study highlight the importance of adhering to proper design standards of lecture halls, optimum occupant control and selection of efficient air conditioning systems to maintain the health and wellbeing of higher education students.

show abstract

Indoor air quality, ventilation and their associations with sick building syndrome in Chinese homes

Cited by 122 publications

References 40 publications

The Applicability of Coanda Effect Hysteresis for Designing Unsteady Ventilation Systems

The Applicability of Coanda Effect Hysteresis for Designing Unsteady Ventilation Systems

Methods for Early Detection of Microbiological Infestation of Buildings Based on Gas Sensor Technologies

Associations of Indoor Carbon Dioxide Concentration and Symptoms of Sick Building Syndrome in Air-Conditioned Lecture Halls

Contact Info

Product

Resources

About