Experimental performance investigation of ventilation schemes in a private bathroom

Tung, Yun-Chun; Shih, Yen‐Ping; Hu, Shih−Cheng; Chang, Yi-Lang

doi:10.1016/j.buildenv.2009.06.007

Cited by 28 publications

(20 citation statements)

References 16 publications

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“…12,13 Exhaust system designs for odor dilution at an air change rate are recommended. 14–18 However, current design practice is not quantitatively associated with contaminant removal efficiency, contaminant generation rate, and airflow patterns related to emission source, exhaust location and room geometry.…”

Section: Introductionmentioning

confidence: 99%

Exhaust ventilation performance in residential washrooms for bioaerosol particle removal after water closet flushing

Mui

Wong

et al. 2016

Building Services Engineering Research and Technology

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Potential bioaerosol infection risk associated with toilet flushing has not been sufficiently addressed in the design of residential washroom exhaust system. This study evaluates the performance of exhaust ventilation for residential washrooms in terms of air change rate, washroom size, washroom geometry, and locations of door louver, exhaust and water closet. Three bioaerosol species namely Escherichia coli (ATCC 10536), Serratia marcescens (ATCC 6911), and Cladosporium cladosporioides (ATCC 16022) are included in the simulations. By shortening the distance between the locations of exhaust and emission source (i.e. water closet), the fractional counts of bioaerosol particles exhausted can be increased. An increased air change rate and a louvered door can also improve the exhaust ventilation performance, yet with a longer time to steady state. This study should provide a useful source of reference for washroom exhaust designers to minimize bioaerosol infection risk. Practical application: This paper shows for residential washroom with an exhaust fan installed, the ventilation performance can be improved by an increased air change rate, and by shortening the distance between the locations of exhaust and emission source.

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Section: Introductionmentioning

confidence: 99%

Exhaust ventilation performance in residential washrooms for bioaerosol particle removal after water closet flushing

Mui

Wong

et al. 2016

Building Services Engineering Research and Technology

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“…In addition, they examined the air exchange and odour removal efficiency differences depending on the make-up of the supply air inlet and exhaust air opening. 10…”

Section: Introductionmentioning

confidence: 99%

“…In addition, they examined the air exchange and odour removal efficiency differences depending on the make-up of the supply air inlet and exhaust air opening. 10 As shown in Figure 1, an exhaust air opening is generally mounted on the ceiling with either a bath and a toilet or a shower and a toilet installed in a Korean apartment bathroom. High-temperature water vapour can be generated from bathing or showering due to the use of hot water, and odours can be emanated from the toilet because of the treatment of human faeces and urine.…”

Section: Introductionmentioning

confidence: 99%

Improvement of ventilation efficiency by changing the shape of glass partition in bathroom of apartment house

Yang

Kim

2016

Indoor and Built Environment

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In the bathroom, the spreading of contaminants may differ depending on whether the shower or toilet is used. The shower and toilet space separated by a glass partition, could affect the spread of contaminants. Computational fluid dynamics analyses were conducted to examine the ventilation efficiency achieved by the glass partition in the bathroom, while a resident was taking a shower and while using the toilet. The following cases were studied: (i) when the top part of the glass partition is open; (ii) when its bottom part is open; and (iii) when both its top and bottom part are open. The SVE3 and SVE6 (scale for ventilation effectiveness) indexes have shown that the condition with the bottom part of the glass partition being open was most effective as compared to the condition of it being not open when the shower and toilet are used. Faster removal of contaminants from the toilet under the condition with the bottom part of the glass partition being open was also observed. Our research has illustrated a suitable glass partition design for enhancing the ventilation efficiency in a bathroom with a shower and toilet to maintain household hygiene standard.

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“…They showed that the increase in the Reynolds number is effective to reduce the average concentration levels. Tung et al [10] studied experimentally the dispersion of pollutants in a humid three-dimensional room (bathroom). The authors examined the effectiveness of the ventilation to eliminate unpleasant odors using the tracer gas method.…”

Section: Introductionmentioning

confidence: 99%

A numerical study of indoor air quality in a ventilated room using different strategies of ventilation

Koufi

Younsi

Chérif

et al. 2017

Mechanics & Industry

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-This study aimed to numerically investigate the air flow and contaminant dispersion in a ventilated room. The URANS equations supplemented with energy and concentration equations are solved using the scStream code. We are targeting primarily the ventilation effectiveness (εc) and the index of indoor air quality (IIAQ). Different displacement and mixing ventilation modes are investigated in isothermal conditions. The ventilation flow rate is 50 m 3 .h −1 Here, our ultimate aim is to suggest an effective ventilation that can ensure a good indoor air quality. The RN G k − ε model was adopted to handle the turbulence. CFD simulations were systematically checked, whenever possible, through available results. The simulation results indicate that the ventilation effectiveness to remove a contaminant and the index of indoor air quality are substantially influenced by the ventilation mode and the location of inlet and outlet air. From this study, it appears that the air flow and contaminant dispersion in a ventilated room can be typically predicted or evaluated by computer simulations.

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Experimental performance investigation of ventilation schemes in a private bathroom

Cited by 28 publications

References 16 publications

Exhaust ventilation performance in residential washrooms for bioaerosol particle removal after water closet flushing

Exhaust ventilation performance in residential washrooms for bioaerosol particle removal after water closet flushing

Improvement of ventilation efficiency by changing the shape of glass partition in bathroom of apartment house

A numerical study of indoor air quality in a ventilated room using different strategies of ventilation

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