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 26 publications

(6 citation statements)

References 52 publications

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“…For the authors of [65], it was also important to draw attention to the fact that the analysis of thermal comfort to ensure appropriate conditions, especially for falling asleep, is often discussed while the importance of ventilation and air movement is omitted. Similar conclusions were reached by other authors of [66], who studied ventilation scenarios for tiny sleeping spaces. Tiny sleeping spaces are increasingly popular spaces that can be found in the form of capsule hotels, sleeping boxes, or sleeper compartments.…”

Section: Thermal Comfort Ventilation and Quality Of Sleepsupporting

confidence: 89%

Recent Achievements in Research on Thermal Comfort and Ventilation in the Aspect of Providing People with Appropriate Conditions in Different Types of Buildings—Semi-Systematic Review

Ratajczak,

Amanowicz,

Pałaszyńska

et al. 2023

Energies

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Ventilation systems are mainly responsible for maintaining the quality of indoor air. Together with thermal comfort maintenance systems, they create appropriate conditions for living, working, learning, sleeping, etc., depending on the type of building. This explains the high popularity of research in this area. This paper presents a review of articles published in the years 2020–2023, which are indexed in the Scopus database and found with keywords “ventilation” and “thermal comfort” in conjunction with the type of building or predominant activity. Finally, 88 selected works for five types of buildings were discussed, namely offices, schools, hospitals, bedrooms, and atriums. Data on publications are summarized in the tables, taking into account the publishing year, country of origin of the authors, and keywords. In this way, the latest directions in research were presented, and research groups dealing with this subject were highlighted. For each type of building, synthetic conclusions were presented, summarizing the results of the analyzed research. This review paper would be helpful for scientists and practitioners in the field of ventilation in order to organize knowledge and in a short time be up to date with the latest research showing how ventilation affects the quality of use of buildings by their users.

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Section: Thermal Comfort Ventilation and Quality Of Sleepsupporting

confidence: 89%

Recent Achievements in Research on Thermal Comfort and Ventilation in the Aspect of Providing People with Appropriate Conditions in Different Types of Buildings—Semi-Systematic Review

Ratajczak,

Amanowicz,

Pałaszyńska

et al. 2023

Energies

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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%

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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“…The flow was assumed to be three-dimensional, steady, incompressible, and turbulent. The k-ε realizable turbulence model, known to be suitable for indoor turbulent flow analysis, was employed [37][38][39]. For flow analysis, the following governing equations were solved [40].…”

Section: Methodsmentioning

confidence: 99%

Comparison of Local Mean Age of Air between Displacement Ventilation System and Mixing Ventilation System in Office Heating Conditions during Winter

An,

Park,

Lee

et al. 2024

Buildings

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A novel displacement ventilation system (DVS) was designed using a four-way cassette fan coil unit (FCU) and air purifiers (APs) for supplying clean air. The proposed DVS in this study involved drawing indoor air through the FCU and diffusers installed in the ceiling, controlling air temperature using the FCU, and then discharging it back into the office through the APs placed on the floor. The comparative ventilation system considered was the typical mixing ventilation system (MVS) that intakes and exhausts indoor air using diffusers installed on the ceiling. The local mean age of air was used as an index to compare indoor air quality between DVS and MVS under winter heating conditions. It was found that the DVS was more effective in improving indoor air quality in winter than the MVS. Moreover, compared to the MVS, utilizing the DVS designed in this study resulted in the advantage of a much more uniform air temperature variation in the office space. Therefore, it is anticipated that modifying the structure of an indoor space with an FCU installed in the ceiling and APs on the floor to use the DVS designed in this study would greatly assist in enhancing indoor air quality.

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Performance evaluation of three attached ventilation scenarios for tiny sleeping spaces

Cited by 26 publications

References 52 publications

Recent Achievements in Research on Thermal Comfort and Ventilation in the Aspect of Providing People with Appropriate Conditions in Different Types of Buildings—Semi-Systematic Review

Recent Achievements in Research on Thermal Comfort and Ventilation in the Aspect of Providing People with Appropriate Conditions in Different Types of Buildings—Semi-Systematic Review

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

Comparison of Local Mean Age of Air between Displacement Ventilation System and Mixing Ventilation System in Office Heating Conditions during Winter

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