Numerical Investigation on Influence of Windbreak Wall Height on Dust Scattering Characteristics

Jeong, Chan Ho; Lee, Jin Woon; Shin, Dong Whan; Kim, Myeongmin; Lee, Seong Hyuk

doi:10.15435/jilasskr.2014.19.3.136

Cited by 4 publications

(1 citation statement)

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“…Using multiple nonlinear regression analysis and calculations of natural ventilation theory, a model and calculation method for natural ventilation of enclosed coal storage facilities based on indoor pollutant concentration control was proposed. Shin et al [22,23] investigated the characteristics of dust scattering in the vicinity of coal stockpiles affected by the height of windbreaks and predicted the wind speed and air pressure distribution in the vicinity of coal stockpiles with four different heights of windbreaks using numerical simulations. The results showed that dust scattering could be reduced by 75%, that the height of the windbreak had an important influence on particle scattering, that ventilation of the windbreak could significantly reduce the wind absorption of the deposition flow on the roof and the windbreak while increasing the overpressure, and that the use of porous windbreaks not only contributed to a good wind climate but also reduced the negative wind load.…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation Based Ventilation and Dust Reduction Strategy for Large Scale Enclosed Spaces in Open Pit Coal Mines—A Case of Coal Shed

Wang

Zhou

et al. 2023

Sustainability

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The coal shed is an enclosed space where raw coal is stored and handled. The intensive operation of the machinery inside the coal shed generates a large amount of dust, and the wind speed inside the enclosed space easily leads to a high concentration of dust, which endangers the physical and mental health of the workers. In this paper, we first studied the particle size distribution of dust samples in the coal shed and found that 12.2% of the dust in the air of the coal shed was 10–100 μm, 87.8% was less than 10 μm, and 72.9% was less than 2.5 μm. Fluent was used to simulate the law of dust dispersion in the coal shed under different working conditions, and finally, the simulation results were used to guide the design of the ventilation site and dust-reduction scenario. The experimental and simulation results show that under the same working conditions, the average dust reduction efficiency of the ventilation method in which the north side and south side pump air outside was 9.9%. The ventilation method in which the north side blows inside and the south side pumps outside was 23.7%. The average dust reduction efficiency of the ventilation method in which the north side blows inside and the south side pumps outside + placing the fan in the middle was 59.9%. The research results can provide some reference value for indoor air quality improvement.

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Section: Introductionmentioning

confidence: 99%