Performance evaluation of three attached ventilation scenarios for tiny sleeping spaces

Yin, Haiguo; Li, Yanyan; Deng, Xin; Han, Yuekun; Wang, Lijuan; Yang, Bin; Li, Angui

doi:10.1016/j.buildenv.2020.107363

Cited by 23 publications

(3 citation statements)

References 52 publications

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“…Meanwhile, the negative pressure only appeared around the exhaust port, which was applicable to the isolation ward. WAV system could also be used in micro-sleeping space to ensure the comfort while maintaining low CO 2 concentration and MAA [ 118 ].…”

Section: Impacts On Thermal Comfort Air Quality and Virus Spread Controlmentioning

confidence: 99%

“…To improve the performance of WAV, Yin et al [ 118 ] compared the performance of WAV under three different working conditions. The double-side-attached ventilation mode performed best in terms of comfort, the horizontal ceiling-attached ventilation mode performed best in terms of MAA, and the vertical wall-attached ventilation mode performed best in terms of CO 2 concentration control.…”

Section: Impacts On Thermal Comfort Air Quality and Virus Spread Controlmentioning

confidence: 99%

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A review of different ventilation modes on thermal comfort, air quality and virus spread control

Fan

Wang

et al. 2022

Building and Environment

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In the era of Corona Virus Disease 2019 (COVID-19), inappropriate indoor ventilation may turn out to be the culprit of microbial contamination in enclosed spaces and deteriorate the environment. To collaboratively improve the thermal comfort, air quality and virus spread control effect, it was essential to have an overall understanding of different ventilation modes. Hence, this study reviewed the latest scientific literature on indoor ventilation modes and manuals of various countries, identified characteristics of different ventilation modes and evaluated effects in different application occasions, wherefore to further propose their main limitations and solutions in the epidemic era. For thermal comfort, various non-uniform ventilation modes could decrease the floor-to-ceiling temperature difference, draft rate or PPD by 60%, 80% or 33% respectively, or increase the PMV by 45%. Unsteady ventilation modes (including intermittent ventilation and pulsating ventilation) could lower PPD values by 12%–37.8%. While for air quality and virus spread control, non-uniform ventilation modes could lower the mean age of air or contaminants concentration by 28.3%–47% or 15%–47% respectively, increase the air change efficiency, contaminant removal effectiveness or protection efficiency by 6.6%–10.4%, 22.6% or 14%–50% respectively. Unsteady ventilation mode (pulsating ventilation) could reduce the peak pollutant concentration and exposure time to undesirable concentrations by 31% and 48% respectively. Non-uniform modes and unsteady modes presented better performance in thermal comfort, air quality and virus spread control, whereas relevant performance evaluation indexes were still imperfect and the application scenarios were also limited.

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Section: Impacts On Thermal Comfort Air Quality and Virus Spread Controlmentioning

confidence: 99%

Section: Impacts On Thermal Comfort Air Quality and Virus Spread Controlmentioning

confidence: 99%

A review of different ventilation modes on thermal comfort, air quality and virus spread control

Fan

Wang

et al. 2022

Building and Environment

View full text Add to dashboard Cite

show abstract

“…Based on the previous research on slot outlet [6], a computational model was established to study the airflow organization of attached ventilation under different air outlet forms. The room size (length × width × height) is 5.4 m × 7.0 m × 2.5 m. In order to ensure the identical air supply volume for different forms of air outlets, the area of the air outlet is set to be the same, the size of the SO (length × width) is 2.0 m × 0.05 m, the size of RO (length × width) is 0.32 m × 0.32 m, the size of CO (diameter) is d=0.356 m, the size of SCO (diameter) is d=0.504 m, and the size of the return air outlet (length × width) is 0.4 m×0.4 m.…”

Section: Physical Modelmentioning

confidence: 99%

Comparative analyses of the air distributions created by attached ventilation with different air outlets

et al. 2022

E3S Web Conf.

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As an innovative ventilation mode, attached ventilation has been widely used in different types of buildings due to its high ventilation efficiency and energy saving. At present, the commonly used air outlet form is slot outlet. Considering the diversity of application places, different air outlet form models (Slot outlet (SO), Rectangular outlet (RO), Circular outlet (CO), Semi-circular outlet (SCO)) were established in this paper. Air distributions of the attached ventilation under different air outlet forms are analyzed and compared. The results show that the attached jet thickness is larger under RO, CO, and SCO form. Compared with SO form, the jet velocities of other three forms decay slowly in the vertical region. The attached ventilation with different outlet forms can form an "air lake" in the occupied zone to ensure the comfort environment. This research provides design references for the design and application of the attached ventilation under different air outlet forms.

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Characteristics of outdoor pollutants intrusion and ventilation control in sentry buildings with normal openings

et al. 2022

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Performance evaluation of three attached ventilation scenarios for tiny sleeping spaces

Cited by 23 publications

References 52 publications

A review of different ventilation modes on thermal comfort, air quality and virus spread control

A review of different ventilation modes on thermal comfort, air quality and virus spread control

Comparative analyses of the air distributions created by attached ventilation with different air outlets

Characteristics of outdoor pollutants intrusion and ventilation control in sentry buildings with normal openings

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