Improving the air change rate in high-rise buildings through a transom ventilation panel: A case study

Aflaki, Ardalan; Hirbodi, Kamran; Mahyuddin, Norhayati; Yaghoubi, M.; Esfandiari, Masoud

doi:10.1016/j.buildenv.2018.10.011

Cited by 33 publications

(28 citation statements)

References 52 publications

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“…The parameters and characteristics of the simulations were carried out in accordance with the software application manual [ 26 ]. This program has been widely used in other branches of engineering, for the simulation of vehicle behaviour (Formula 1 cars, airplanes...), but also for buildings and heritage [ 27 , 28 ], as well as ventilation in buildings [ 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Hygrothermal Behaviour in Heritage Buildings through Sensors, CFD Modelling and IRT

Lerma

Borràs

Más

et al. 2021

Sensors

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Architectural heritage, building materials and interior space are highly susceptible to temperature and relative humidity. A better knowledge of the hygrothermal dynamics inside buildings allows an adequate conservation of heritage. This work compares three non-destructive techniques (NDT), such as temperature and relative humidity sensors, finite element simulations (CFD) and thermographic pictures (IRT). The work has made it possible to carry out an assessment of the risk of condensation over a year and to identify affected periods and areas of the building. Sensors and IRT pictures provide real data to validate CFD simulations, facilitating a global analysis of the building. The results provided reflect a great concordance between the NDTs used.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Hygrothermal Behaviour in Heritage Buildings through Sensors, CFD Modelling and IRT

Lerma

Borràs

Más

et al. 2021

Sensors

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“…Using a transom ventilation panel in high-rise buildings transforms single-sided ventilation into crossventilation. In a study by Aflaki et al [31], the air velocity was doubled by 2.4.…”

Section: Single-sided and Cross-ventilation Potentials Andmentioning

confidence: 97%

“…Studies such as those by Aflaki et al [31], Arinami et al [32], and Wang and Chen [33] explored methods to extend the potentials of single-sided ventilation and overcome its limitations. Using a transom ventilation panel in high-rise buildings transforms single-sided ventilation into crossventilation.…”

Section: Single-sided and Cross-ventilation Potentials Andmentioning

confidence: 99%

Improving Indoor Air Quality in Classrooms via Wind-Induced Natural Ventilation

Bayoumi

2021

Modelling and Simulation in Engineering

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Student performance in classrooms is related to the indoor environmental quality. High air change rates are necessary to secure an acceptable level of indoor air quality and provide fresh air, which require large amounts of energy and technical installations. Mostly, mechanically supplied air is partially mixed with the return air. In warm climates, the capacity for natural ventilation is not fully exploited in modern buildings. During periods of acceptable outdoor temperatures, buildings need to adapt and employ available free renewable resources, such as wind. In this context, the building form, orientation, and envelope openings are crucial to enable an increased air change rate, user satisfaction, and energy savings. Owing to the difficulty of providing cross-ventilation in buildings with double-loaded corridors, single-sided ventilation is the most common approach. This study investigates the methods to improve the wind-driven air exchange of classrooms in warm climates, where naturally ventilated corridors help increase air movement. This study examines the potential of a set of alternatives within the context of a generic model regarding the pressure distribution, thermal sensation, air velocity, and air change rate. The study suggests that no single opening scenario can be applied to all façades at any time. Each façade requires special treatment. Decisions on natural ventilation need to be made during the early design stages for each façade. It was found that with the aid of low-tech modifications, remarkable increases in air change rates, in some cases up to 14.5 times that of the typical single-sided ventilation case, could be achieved.

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“…Their findings provide guidelines for reducing power consumption while improving thermal comfort levels. Beside active systems, a passive design strategy, such as wind-driven ventilation, was used to increase indoor air velocity in naturally ventilated buildings [20]. Several authors recommend to define measures from the perspective of energy saving and IEQ combined.…”

Section: Deteriorated Indoor Environmental Quality As a Collateral Damentioning

confidence: 99%

Deteriorated Indoor Environmental Quality as a Collateral Damage of Present Day Extensive Renovations

Dovjak¹,

Slobodnik²,

Krainer³

2018

SV-JME

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Optimal indoor environmental quality (IEQ) is especially important in every living and working environment with present vulnerable population groups. Especially problematic are educational institutions, where prolonged exposure time of users additionally increases health risks. The present study is focused on the problem of deteriorated IEQ in renovated kindergarten. The problem was critically assessed from the aspects of indoor air quality (IAQ) and energy use. A combination of simulations of the selected IAQ parameters and building energy use was performed for five sets of scenarios, where required and recommended design ventilation rates variated according to Slovenian legislation. Characteristics of actual kindergarten in central Slovenia, renovated in 2016, were used for simulations. Concentrations of CO 2 and formaldehyde were calculated in two model playrooms with CONTAM 3.2, whereas building energy use was calculated for two thermal zones of playrooms with Energy Plus 8.0.0. If ventilation in playrooms was designed according to the minimal permissible value (air changes per hour) ACH 0.5, CO 2 concentrations exceeded the national maximum permissible level by 2.5 and 3 times, and formaldehyde concentrations was close to the value recommended by World Health Organisation (WHO) and exceeded the level recommended by National Institute for Occupational Safety and Health (NIOSH-CDC) by 4.6 and 4.5 times. All required and recommended design ventilation rates resulted in exceeded values of CO 2 above recommendation for category I of IAQ, except the design ventilation rate 55 m 3 /h per person. In-line with public health protection measures, relevant information is an aid for recommendation definitions for policies and strategies towards healthier indoor environments as well as for raising awareness about current design practice.

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Improving the air change rate in high-rise buildings through a transom ventilation panel: A case study

Cited by 33 publications

References 52 publications

Evaluation of Hygrothermal Behaviour in Heritage Buildings through Sensors, CFD Modelling and IRT

Evaluation of Hygrothermal Behaviour in Heritage Buildings through Sensors, CFD Modelling and IRT

Improving Indoor Air Quality in Classrooms via Wind-Induced Natural Ventilation

Deteriorated Indoor Environmental Quality as a Collateral Damage of Present Day Extensive Renovations

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