Numerical Simulation of Thermal Environment in High Heat Tunnel

2012 ◽  
Vol 516-517 ◽  
pp. 519-523
Author(s):  
Qiang Che
Keyword(s):  
Numerical Simulation ◽  
Thermal Damage ◽  
Thermal Environment ◽  
High Heat ◽  
Mine Safety ◽  
Safety Regulation ◽  
Air Velocity ◽  
Coal Mine Safety ◽  
Field Temperature ◽  
Simulation Results

With the increasing depth of coal mining, problems of high temperature thermal damage in mine become more and more serious. A high heat tunnel thermal environment case is numerical simulated in the presented work, PMV (Predicted Mean Vote) indices are using to predict the thermal comfort of environment, velocity field, temperature field and PMV values field in high heat tunnel had been obtained. The simulation results indicated while the inlet air velocity is 0.7 m/s, the temperatures in most tunnel area are below 26 °C and the thermal environment conforms to the Coal Mine Safety Regulation in China.

Study on Improving Thermal Environment of College Dormitory in Chongqing

2012 ◽  
Vol 610-613 ◽  
pp. 2849-2853
Author(s):  
Hong Yin Ou ◽  
Fang Liu ◽  
Qing Long Song ◽  
Long Xing Yu
Keyword(s):  
Field Test ◽  
Indoor Environment ◽  
Thermal Environment ◽  
Air Velocity ◽  
Thermal Discomfort ◽  
Indoor Thermal Environment ◽  
Simulation Results

To improve the low air velocity above the bed areas during the night in hot summer, the reformed plan for the college dormitory fan was presented.The indoor environment was simulated by the software Airpak3.0 to compaire the fan with both no diversion deflector and diversion deflector (the deflector angles are 60°, 120° and 160°) respectively. And a field test was conducted to confirm the simulation results. The results show that the indoor thermal environment above the bed areas has been improved inordinately if adding a deflector with different angles. The air velocity can be increased by 0.15m/s at most when the deflector angle is 160°, yet the airflow displays most evenly with the 120° deflector angle. Meanwhile, the temperature and thermal discomfort have been decreased. The variation of the simulation and measurement values tends to be consistent, so it suggests the fan installing the diversion deflector may improve the thermal environment of college dormitory.

The Research on Influence of Different Forms of Window on Indoor Natural Ventilation in Residential Building

2013 ◽  
Vol 353-356 ◽  
pp. 3109-3113
Author(s):  
Xiao Ping Huo ◽  
Jia Yu Hu ◽  
Dan Li
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Temperature Field ◽  
Natural Ventilation ◽  
Residential Building ◽  
Measured Data ◽  
Air Velocity ◽  
Indoor Temperature ◽  
Simulation Results ◽  
Maximum Limit

The indoor temperature can be reduced by rationally using natural ventilation in summer. Based on the computational fluid dynamics software of AIRPAK, its convenient to simulate the air velocity field and temperature field of a house. Comparing software numerical simulation results with measured data, we conclude that under the maximum limit of window-wall ratio, the bigger the windows are, the greater the airflow effect is, the better the indoor ventilation effect is.

Empirical Study of Coal Mine Safety Regulation in China

2010 ◽  
Vol 43 (4) ◽  
pp. 73-92
Author(s):  
Xiao Xingzhi ◽  
Qi Yingfei ◽  
Li Hongjuan
Keyword(s):  
Empirical Study ◽  
Coal Mine ◽  
Mine Safety ◽  
Safety Regulation ◽  
Coal Mine Safety

The Effect of Orifice Plate on Flow Field and Thermal Environment in Oven Box

2015 ◽  
Vol 713-715 ◽  
pp. 47-50
Author(s):  
Hao Li ◽  
Zhi Jun Zou ◽  
Fei Wang
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Thermal Environment ◽  
Air Flow ◽  
Orifice Plate ◽  
Air Velocity ◽  
Change Rate ◽  
Air Volume

Air velocity in oven box is an important factor. The value of air velocity will affect the result of drying. This paper use the method of numerical simulation to research the effect of orifice plate on flow field and thermal environment in oven box. The results show the change rate of thermal environment & air flow field in oven box is depend on supply air volume, and the use of orifice plate will affect the flow field obviously.

The Numerical Simulation of Thermal Environment of Strawberry Greenhouse in Natural Ventilation

2014 ◽  
Vol 501-504 ◽  
pp. 2276-2281 ◽  
Author(s):  
Wei Hong Fu ◽  
Shi Jun You
Keyword(s):  
Numerical Simulation ◽  
Wind Speed ◽  
Air Temperature ◽  
Natural Ventilation ◽  
Thermal Environment ◽  
Environmental Parameters ◽  
Outdoor Air ◽  
Air Velocity ◽  
Indoor Thermal Environment ◽  
Average Temperature

The method of numerical simulation was adopted in this study to explore the size of the natural ventilation inlet opening, outdoor temperature and ambient wind speed and other environmental parameters to effect of the varied rules of thermal environment of the strawberry solar greenhouse. The variation of outdoor air temperature effected greatly to the indoor thermal environment, the average air velocity in the strawberry growing zoon within the greenhouse was rose initially and dropped tend to the steady with increasing outdoor air temperature. The average temperature in the strawberry growing zoon was decreased with increasing the outside wind speed. The average air velocity was increased gradually in the strawberry growing zoon within the greenhouse with increasing outdoor wind speed. The average velocity was reduced gradually toward to constant.

Numerical Simulation Studies on Surface Erosion of Transmission Line in Sand and Dust Conditions

2012 ◽  
Vol 249-250 ◽  
pp. 82-87
Author(s):  
Guang Ru Hua ◽  
Xin Lu ◽  
Qiang Xiao ◽  
Hai Yang Wang
Keyword(s):  
Numerical Simulation ◽  
Transmission Line ◽  
Surface Erosion ◽  
Phase Flow ◽  
Simulation Studies ◽  
Air Velocity ◽  
Two Phase ◽  
Simulation Results ◽  
Maximum Sustained Wind Speed ◽  
Maximum Stresses

In order to reveal the characteristics of surface erosion of transmission line in sand and dust conditions in the northwest of China, an approach of simulating sandstorm flow field and impact on transmission line is proposed. Based on FLUENT model of two phase flow, the velocity flowing around the line and impacting direction between sand and line are analyzed. Simulation results show that the maximum sustained wind speed amounts to 20.9m/s at up and down side of line when the air velocity keeps at 15m/s. The simulation of impacting process based on LS-DYNA shows that the maximum displacements are 0.45×10-3mm, 4×10-3mm and 10×10-3mm and maximum stresses are 0.25Mpa, 7MPa and 16MPa in the three processes which sand size is 0.25mm, 0.50mm and 0.75mm respectively.

Avalanche Features in Silicon Schottky-FETs in Accordance with Numerical Simulation Results

2006 ◽  
Vol 65 (16) ◽  
pp. 1533-1546
Author(s):  
Yu. Ye. Gordienko ◽  
S. A. Zuev ◽  
V. V. Starostenko ◽  
V. Yu. Tereshchenko ◽  
A. A. Shadrin
Keyword(s):  
Numerical Simulation ◽  
Simulation Results
Sign in / Sign up

Export Citation Format

Share Document