Numerical Simulation Analysis of the Groundwater’ Temperature Field in the Concentration Area of the Water Source Heat Pump Engineering

2012 ◽  
Vol 174-177 ◽  
pp. 3027-3030
Author(s):  
Wei Wei ◽  
Ming Zhong Wang ◽  
Jun Pan
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Temperature Field ◽  
Numerical Model ◽  
Heat Pump ◽  
Simulation Analysis ◽  
Water Source ◽  
Groundwater Temperature ◽  
Change Trend

In order to avoid the heat transfixion among users in the concentration area of the water source heat pump, a suitable layout of pumps for drawing and recharging wells is required. Finite element method is adopted to establish the numerical model of groundwater temperature to predict the change trend of water temperature. The results of the simulation indicate that the groundwater temperature change from 6.3 to 14.2 °C in winter, and from 11.5 to 21.2 °C in summer. These results meet the requirements of the drawing and recharging water in the water source heat pump engineering and are able to avoid the heat transfixion among users. The effect of drawing and recharging water in the water source heat pump engineering to the changes of the groundwater’s temperature field can be analyzed quantitatively through establishing the proper numerical simulation which provides a reference to scientifically design the layout of pumps for drawing and recharging water.

Numerical Simulation on Hydrogen Dispersion in Automobiles due to Storage Cylinder Failure

2011 ◽  
Author(s):  
Yan-Lei Liu ◽  
Jin-Yang Zheng ◽  
Shu-Xin Han ◽  
Yong-Zhi Zhao
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Numerical Model ◽  
Hydrogen Sensor ◽  
High Concentration ◽  
Concentration Region ◽  
Species Transport ◽  
Safety Design ◽  
Simulation Results

A numerical model for dispersion of hydrogen in hydrogen powered automobiles was established basing on finite element method with species transport and reaction module of FLUENT. And corresponding numerical simulations were done in order to analysis the dispersion of hydrogen due to leakage from different position of the storage cylinder on the automobiles. Also, the distribution of the hazard region due to hydrogen dispersion was obtained. The simulation results show that the baffle above the cylinder can accumulate the hydrogen. Therefore, the high concentration region of hydrogen exists near the baffle. The study can provide reference for hydrogen sensor placement and safety design of hydrogen powered automobiles.

Numerical Simulation Analysis on the Temperature Field in Indirect Selective Laser Sintering of 316L

2013 ◽  
Vol 711 ◽  
pp. 209-213 ◽  
Author(s):  
Nai Fei Ren ◽  
Lei Jia ◽  
Dian Wang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Temperature Field ◽  
Heat Source ◽  
Simulation Analysis ◽  
Selective Laser Sintering ◽  
Element Model ◽  
Cyclic Loads ◽  
Physical Experiments ◽  
Key Points

Using APDL programming language, an appropriate finite element model is created and the moving cyclic loads of Gauss heat source are realized. From the detailed qualitative analysis of the results, the variety laws of temperature field in indirect SLS are obtained. Plot results at different moments, temperature cyclic curves of key points and the curves of depth of fusion and width of fusion on the set paths, are of important guiding significance for subsequent physical experiments.

Numerical Simulation for Groundwater-Source Heat Pump Engineering Disposing Wells Scheme in the Coastal Region

2011 ◽  
Vol 148-149 ◽  
pp. 1408-1412
Author(s):  
Jun Pan ◽  
Chang Liu ◽  
Yang Li
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Groundwater Flow ◽  
Ground Water ◽  
Heat Pump ◽  
Coastal Region ◽  
Water Source ◽  
Simulation Results ◽  
Groundwater Source ◽  
Change Tendency

For analysis the MOMA FengHui residential of BaYuquan area ground- water source heat pump engineering on the influence of seawater invasion，Established the groundwater flow and solute transport and temperature coupling numerical model，Simulated forecast the change tendency of the groundwater flow and solute and temperature of two different disposing Wells scheme. Simulation results show that the two kinds of disposing Wells solutions are not cause seawater invasion, the second disposing Wells scheme help to prevent the occurrence of seawater invasion.

The effect of construction designs on temperature field of a roller compacted concrete dam — a simulation analysis by a finite element method

2003 ◽  
Vol 30 (6) ◽  
pp. 1153-1156 ◽  
Author(s):  
Y L Chen ◽  
C J Wang ◽  
S Y Li ◽  
L J Chen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Temperature Field ◽  
Simulation Analysis ◽  
Thermal Simulation ◽  
Maximum Temperature ◽  
Mass Concrete ◽  
Roller Compacted Concrete ◽  
Rcc Dam ◽  
Element Method

In this paper a numerical simulation of the construction process of roller compacted concrete (RCC) dams is presented. The following features of construction of mass concrete have been considered: hydration heat, age, placing temperature, starting placement date, and placing speed. A 3-D finite element model of the Long-Tan RCC dam, which is to be built in the Guangxi Autonomous Region in China, was analyzed. Temperature distribution and evolution inside the RCC dam were calculated during and after the completion of the dam. Using FortranTM code, a 3-D thermal simulation analysis of a high RCC dam can be realized on a computer at the construction site. Based on the real factors during the construction period, engineers can predict the distribution of temperature in the RCC dam. Therefore, engineers can take appropriate measures to control concrete temperature to reduce thermal stress within the dam. The effects of the concrete placing temperature, construction speed, and starting date on the temperature are discussed. It has been found that the maximum temperature in a dam can be reduced by 20% through temperature control measures.Key words: RCC dam, thermal simulation analysis, finite element method, temperature field, construction schedule.

Numerical Simulation Analysis on Repairing Hole of UAV Wing

2013 ◽  
Vol 690-693 ◽  
pp. 2891-2895
Author(s):  
Guo Dong Jin ◽  
Li Bin Lu ◽  
Liang Xian Gu ◽  
Juan Liang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Service Life ◽  
Simulation Analysis ◽  
High Stress ◽  
Reference Value ◽  
Safety Standards ◽  
Aerial Vehicle ◽  
Element Method

Parachute recovery of UAV is often caused of holes and other injuries on wings, that are required repair and maintenance. The surface of the patch will form the high stress area, that affects UAV using life and safety .But repair method is good or bad directly affects size of the high stress area. Based on finite element method, the broken hole repairing method was formulated and validated by ANSYS. The method could minimize the high stress area as far as possible, and economically repair broken hole of wing in certain precision and safety standards condition. It has a certain reference value for UAV repair and management, and has reference significance for extending the service life of the UAV. Key words: Finite element method; Unmanned Aerial Vehicle (UAV); Simulation; Hole of wings

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