Impact of impinging jet ventilation on thermal comfort and aerosol transmission: A numerical investigation in a densely-occupied classroom with solar effect

Journal of Building Engineering, Год журнала: 2024, Номер 94, С. 109872 - 109872

Опубликована: Июнь 19, 2024

Язык: Английский

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Influence of indoor airflow on airborne disease transmission in a classroom

Building Simulation, Год журнала: 2024, Номер 17(3), С. 355 - 370

Опубликована: Янв. 19, 2024

Язык: Английский

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Optimization strategy for minimizing energy consumption of air conditioning terminal system in the Internet data center

Journal of Building Engineering, Год журнала: 2024, Номер 96, С. 110315 - 110315

Опубликована: Июль 30, 2024

Язык: Английский

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Optimization of ventilation and dust removal parameters in plateau extra-long tunnel inclined shaft based on orthogonal numerical simulation test method

Construction and Building Materials, Год журнала: 2024, Номер 455, С. 139131 - 139131

Опубликована: Ноя. 13, 2024

Язык: Английский

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On Euler-Lagrange URANS turbulence models for predicting the transient dispersion of aerosols indoors

Building and Environment, Год журнала: 2025, Номер unknown, С. 112601 - 112601

Опубликована: Янв. 1, 2025

Язык: Английский

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Factors influencing the results of air samplers in closed, air-conditioned patient rooms—a numerical study

Environmental Science and Pollution Research, Год журнала: 2025, Номер unknown

Опубликована: Март 5, 2025

Several air sampling studies have been conducted to assess the risk of airborne transmission since outbreak SARS-CoV-2 in late 2019. However, differences sampler positioning and positive collection results more distant locations suggest an interaction between indoor flow, altering aerosol distribution. This study aims investigate this influence by studying multiple collector positions, patient exhalation modes, two ventilation setups a 3D simulation model using implicit large-eddy simulations along with evaporative Lagrangian particles. The show higher total particle amount room deployment device, possibly increasing infection for medical personal during shortly after procedure. Furthermore, variation position reveals impact on yield, thus rendering even positions viable potentially beneficial terms maintaining performance comfort. Moreover, was investigated suggesting deactivation increase concentration campaigns efficient sampling. Additionally, indicate flow samplers subsequent necessitating reassessments conclusions drawn from previous studies. Finally, it can be concluded that future campaigns, which are preliminarily assessed numerical simulation, could benefit advantageous aid success.

Язык: Английский

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An Experimental Study on the Efficacy of Local Exhaust Systems for the Mitigation of Exhaled Contaminants in a Meeting Room

Buildings, Год журнала: 2024, Номер 14(5), С. 1272 - 1272

Опубликована: Май 1, 2024

In industrial applications, local exhaust systems have been used extensively for capturing and confining contaminants at their source. The present study investigates the efficacy of these in mitigating spread exhaled pollutants by combining them with mixing displacement ventilation. Experiments were conducted a simulated meeting room six closely situated workstations, featuring five exposed persons (simulated heated dummies) one infected person breathing manikin). Six overhead units, merged panels, corresponding to installed using lowered false ceiling. Additionally, table plenum setting air inlets was introduced enhance ventilation effectiveness along systems. Results from 16 experimental cases are presented, quality index zone. system improved measuring locations closest infector almost all test scenarios. improvement, particularly significant ventilation, marked maximum 35% increase adjacent 25% entire zone tested room. Moreover, settings, coupled further enhanced conditions Under specific this investigation, number operational exhausts had marginal impact on but tests. also influenced levels heat gains Overall, aims contribute ongoing efforts identify sustainable solutions mitigate indoor airborne diseases combination supply units.

Язык: Английский

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Numerical evaluation of space form design for outpatient waiting space to reduce airborne infection risk in hospitals

Journal of Building Engineering, Год журнала: 2024, Номер 83, С. 108473 - 108473

Опубликована: Янв. 6, 2024

Язык: Английский

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Study on the characteristics of dust diffusion during a truck travelling in an open-pit coal mine affected by the vertical wind shear

Journal of Hazardous Materials, Год журнала: 2024, Номер 483, С. 136611 - 136611

Опубликована: Ноя. 20, 2024

Язык: Английский

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Thermofluid dynamics and droplets transport inside a large university classroom: Effects of occupancy rate and volumetric airflow

Journal of Aerosol Science, Год журнала: 2023, Номер 175, С. 106285 - 106285

Опубликована: Окт. 14, 2023

The airborne droplets released by humans while speaking or coughing are the main sources of human-to-human contagion for transmissible diseases. Due to recent SARS-Cov2 pandemic, indoor transmission in classrooms and other environments is an interesting topic investigated scientific community. In this work, thermofluid dynamic conditions droplet transport was analysed a large University Classroom (UC), as function inlet airflow occupancy rate. These parameters assume relevant role design stage. However, their effects on were not deeply literature. Therefore, different analyzed, such as: full occupancy, which represents condition where no social distancing enforced; half representative distancing; empty UC, be considered term comparison. novelty work related analysis combined effect thermal plume UC. numerical model dynamics simulation validated previous emission retrieved from High volumetric always beneficial reduction risk. An important aspect plume, cannot ignored if rate assumes significant value. Moreover, evacuation age indicators assess cleaning time.

Язык: Английский

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