Sustainable Smoke Extraction System for Atrium: A Numerical Study

Ivanov, Martin Lyubomirov; Peng, Wei; Wang, Qi; Chow, Wan Ki

doi:10.3390/su13137406

Cited by 8 publications

(10 citation statements)

References 44 publications

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“…From the experiment results, the station atrium was beneficial for accumulating the smoke then exhausting it at the early stage. In previous studies, some scholars confirmed that a higher atrium could improve the efficiency of smoke extraction significantly [18,30,31]. Larger atrium space could strengthen the capacity for smoke storage, and also enhances the stack effect.…”

Section: Temperature Distributionmentioning

confidence: 93%

“…At 120 s after the ignition in Test 1 at station A, the production of smoke was steady. As shown in Figure 15, the clear smoke stratification formed vertically in the subway platform, owing to the comprehensive effect of smoke buoyance force [18,30,33]. High-temperature smoke would flow upward under the influence of the stack effect, and the smoke layer would change with the variation of the height between smoke and fresh air.…”

Section: Validation Of Numerical Simulationmentioning

confidence: 99%

“…Through small-scale experimental and numerical studies, Wang et al [17] researched a hybrid ventilation system in a large subway depot and proposed a critical velocity range to maintain the temperature at the bottom layer. Ivanov et al [18] proposed a sustainable new hybrid design combining the advantages of static and dynamic systems, which could result in a lower smoke temperature and higher smoke-layer interface height. The approach for assessing various smoke control methods has been outlined by Yao et al [19], and an effective smoke exhaust strategy was suggested.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation on the Effect of Platform Height on Smoke Characteristics of Fire Scenarios for Subway Stations

et al. 2021

Sustainability

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In this study, three full-scale experiments and a series of numerical simulations were conducted to investigate the influence of subway platform height and atrium ceiling height of subway stations on smoke control by mechanical exhausting systems. The smoke temperature variation with time, maximum temperature distribution, and smoke stratification were discussed. Results showed that the atrium had capacity to store smoke, especially at the early stage of smoke spread. However, the efficiency of smoke extraction did not increase simply with the rise in platform height and atrium ceiling height, and favorable smoke exhaust velocity was crucial for smoke elimination. The optimal smoke exhaust velocity was studied by numerical simulation and it was found that the area of smoke diffusion in subway stations with a higher platform was significantly smaller under the optimal smoke exhaust velocity. In addition, a prediction model of optimal smoke exhaust velocity with subway platform height was proposed. This study could provide on-site data and smoke spread characteristics for smoke control design, operation, and, significantly, guide safety evacuation of the exhaust system of subway stations.

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Section: Temperature Distributionmentioning

confidence: 93%

Section: Validation Of Numerical Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation on the Effect of Platform Height on Smoke Characteristics of Fire Scenarios for Subway Stations

et al. 2021

Sustainability

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“…A design fire with high HRR such as 20 MW is commonly used for designing natural vents, but a low HRR such as 5 MW is used for mechanical ventilation system. A sustainable new hybrid design combining the advantages of static and dynamic systems is proposed [29], which could result in a lower smoke temperature and higher smoke layer interface height, indicating a better extraction design.…”

Section: Introductionmentioning

confidence: 99%

A discussion on design fires for high-speed railway train cars

XİAO

Chow

Peng

2022

International Journal of Automotive Science and Technology

Self Cite

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High-speed rail systems are expanding everywhere for carrying thousands of passengers every day. Train cars in underground spaces travel under dense urban areas, tunnels in mountainous places and bridges across rivers. Design fire in burning a train car should be studied carefully for fire hazard assessment in those long underground or enclosed spaces. There are full-scale burn-ing testing results on the main combustibles including seat, curtain and passenger luggage in some train cars. The heat release rate of a high-speed train car model CRH1 will be studied using such data together with a two-layer fire zone model, the Consolidated Model of Fire and Smoke Transport (CFAST). Simulation will be performed on the full-sized train car with the heat release rate of the seat measured by experiment. Two fire scenarios with ignition points located in the front and rear areas of the train compartment are considered. The results of the fire simulations show that the heat release rate can reach 43 MW. The value is similar to the full-scale burning ex-periments on train cars in Sweden and South Korea. Active fire protection systems have to be se-riously considered in those underground or enclosed areas.

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“…As a result, it provides the required rate of air changes in buildings [2]. For improving the thermal comfort of these buildings, Computational Fluid Dynamics analyses are very often developed and allow for consideration of some configurations for their daily and fire ventilation systems [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Performance-Based Solutions of Thermal and Smoke Control Ventilation in Industrial Power Plant Buildings

Brzezińska

2022

Energies

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Industrial power plant buildings differ from all other types of buildings, mainly due to their significant heights and volumes without internal floor sections, exceptionally heat gains during daily work, and potentially high fire risk. Those buildings consist of boiler and turbine houses with multilevel stairways. This complicated architecture creates an extraordinary natural thermal stack effect, causing special ventilation and smoke control systems requirements, adapted to their specific structures and internal conditions. The paper demonstrates a proposal for optimal thermal smoke control ventilation solutions in industrial power plant buildings designated on the basis of performance-based calculations and confirmed by CFD simulations. It demonstrates the possibilities of using daily ventilation in the boiler houses in a function of smoke control systems in the event of a fire and defines fundamental rules for designing the system. Additionally, a new method of sufficient staircase (pylons) protection with a modified pressurization system is proposed.

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Sustainable Smoke Extraction System for Atrium: A Numerical Study

Cited by 8 publications

References 44 publications

Investigation on the Effect of Platform Height on Smoke Characteristics of Fire Scenarios for Subway Stations

Investigation on the Effect of Platform Height on Smoke Characteristics of Fire Scenarios for Subway Stations

A discussion on design fires for high-speed railway train cars

Performance-Based Solutions of Thermal and Smoke Control Ventilation in Industrial Power Plant Buildings

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