Comparison of Air Distribution of Induced Ventilation System's Different Exhaust Way in Underground Garage

2013 ◽  
Vol 805-806 ◽  
pp. 1547-1550
Author(s):  
Shao Wen Shang ◽  
Yan Xing
Keyword(s):  
Numerical Simulation ◽  
Ventilation System ◽  
Pollutant Concentration ◽  
Simple System ◽  
Air Distribution ◽  
Increasing Trend

Induced ventilation system with the advantages of simple system and convenient installation has been widely used in China's underground garage ventilation design and showed an increasing trend. In this paper, the numerical simulation is done to the different air exhaust way of induction ventilation system of an underground garage. The two air exhaust ways are upper exhaust and upper 1/3 and lower 2/3. By analyzing airflow organization and pollutant concentration of the two exhaust ways, we can derive that upper 1/3 and lower 2/3 air exhaust way is conducive to the discharge of pollutants.

Transient Numerical Simulation for Air Distribution of Air Conditioning and Ventilation in Subway Island-Platform

2011 ◽  
Vol 250-253 ◽  
pp. 3107-3114
Author(s):  
Hong Ming Fan ◽  
Kai Yuan He ◽  
Zhi Fang Yin ◽  
Dan Zhang
Keyword(s):  
Numerical Simulation ◽  
Air Conditioning ◽  
Thermal Environment ◽  
Ventilation System ◽  
Simulation Method ◽  
Subway Station ◽  
Air Distribution ◽  
Wind Effect ◽  
Piston Effect ◽  
Transient Numerical Simulation

The typical subway island-platform of Beijing as research object was present in the article. Taking two-equation turbulence model and giving boundary conditions of piston wind and train heat load change with the time, adopting numerical method simulates air distribution of air-conditioning and ventilation system in subway. The results indicate that piston wind effect has significant impact on the area of platform entrance and staircase entrance while station with safety doors can obstruct piston effect at a certain degree. Simultaneity, the supply- exhaust air system offers relatively uniform temperature and velocity field, which meets requirements of transitory comfort for passengers. It is found that numerical simulation method can simulate and forecast air distribution of air conditioning and ventilating system in subway station. In conclusion, it can provide the reference for optimizing air-conditioning and ventilation system, improving thermal environment designing of subway station.

scholarly journals Numerical Evaluation of the Performances of the Ventilation System in a Blast Furnace Casthouse

2021 ◽  
Author(s):  
Hui Wang ◽  
Tianying Wang ◽  
liuchan Liu ◽  
Zhengwei Long ◽  
Pu Zhang
Keyword(s):  
Numerical Simulation ◽  
Blast Furnace ◽  
Ventilation System ◽  
Real Data ◽  
Scientific Basis ◽  
Air Distribution ◽  
Density Distributions ◽  
Wind Speed Distribution ◽  
Ventilation Performance ◽  
Factory Building

Abstract The blast furnace casthouse is a typical heavy-polluting factory building of a steel enterprise. During the tapping process and the taphole opening, the dust concentration in the factory building's workroom can reach tens of thousands mg/m³. Over time, the air pollutants in the workplace can have unwanted consequences on employees' health. This paper selected a typical blast furnace tapping workshop and measured on-site the characteristics of the wind speed distribution, temperature distribution, and soot concentration distribution during the taping period. A numerical simulation model was established to analyze the taphole smoke exhaust system's performance based on computational fluid dynamics. The findings are: the velocity, temperature, and smoke density distributions in the workplace were very uneven, and the thermal comfort of the workers' area was relatively poor. Also, the concentration of PM2.5 was mostly below 80μg/m³. Besides, due to the plant's on-site measurement, real data was obtained for numerical simulation verification, making the evaluation of the entire plant's ventilation performance more reliable. Hence, this article's finding provides a scientific basis for optimizing the air distribution in the blast furnace cast house's workplace.

NUMERICAL SIMULATION OF VENTILATION SYSTEM WITHIN AN ARMORED VEHICLE CABIN

2007 ◽  
Vol 14 (2) ◽  
pp. 201-223
Author(s):  
Chin-Lung Chang ◽  
Chang-Hsien Tai ◽  
Chien-Hsiung Tsai ◽  
Yu-Ren Wang ◽  
Qing-Shan Hon
Keyword(s):  
Numerical Simulation ◽  
Ventilation System ◽  
Vehicle Cabin ◽  
Armored Vehicle

A Wall Base Ventilation System Applied at Different Wall Geometries—Numerical Simulation of the Evaporative Process

2012 ◽  
Vol 30 (1) ◽  
pp. 1-12 ◽  
Author(s):  
J. M. P. Q. Delgado ◽  
A. S. Guimarães ◽  
V. P. de Freitas
Keyword(s):  
Numerical Simulation ◽  
Ventilation System

Study on the Integrated Design of Underground Construction Lighting and Ventilation System

2011 ◽  
Vol 374-377 ◽  
pp. 702-705
Author(s):  
Wei Feng ◽  
Hui Min Li
Keyword(s):  
Numerical Simulation ◽  
Thermal Environment ◽  
Ventilation System ◽  
Integrated Design ◽  
Structure Design ◽  
Light Environment ◽  
System Model ◽  
Underground Construction ◽  
New Type

In the underground building, Light environment and thermal environment is poorer, in order to improve the problem, this paper brings forward a new type of lighting and ventilation system model; discusses the principle and characteristics of transmission; and analyses the question that influences lighting and ventilated effect in the application. Structure design and numerical simulation is the focus of the next step.

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