Student Researchers’ Abstracts College of Business
The Application of the Energy Balance Equation of the TEC Unit and Performance of TEC Refrigerator
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- Topographical Effects in 3D Wind Field Construction
- Wake Structure and Yaw Effect Analysis Based on NREL Phase VI Rotor
- Enhancement of Steel Industry Safety Training through Incident Visualization
- Vertical Edger Longevity Extrapolation Based on Finite Element Analysis
The Application of the Energy Balance Equation of the TEC Unit and Performance of TEC RefrigeratorHuanan Shen Mentor(s): A. G. Agwu Nnanna Graduate Oral Presentation The thermoelectric component (TEC) is designed for the portable refrigeration system and electronic cooling system. In this study, a TEC cooling unit was assembled specifically as a portable refrigerator. This refrigerator system consisted of a TEC cooling unit and a thermal isolated box, with the TEC unit mounted on the cover of the box. Temporal evolution of temperature were measured to evaluate transient and steady-state heat transfer rate. Result showed that the cooling capacity and energy efficiency were associated with the electric current. The Seebeck effect, Joule effect, and Fourier effect influenced the performance of TEC unit. This paper has been presented and published in ASHRAE WINTER conference 2015.
Mentor(s): Xiuling Wang Graduate Oral Presentation Nowadays, the renewable energy is taken a profound issue, as the energy crisis is more and more serious. Wind power as an essential renewable energy is analyzed in depth for wind resource assessment, wind turbine siting and atmosphere evaluation by multiply methods. 3D wind field construction provides an efficient way for wind resource assessment, wind turbine siting and atmosphere evaluation by applying Computational Fluid Dynamics (CFD) techniques. The development of turbulent flow over complex terrain and boundary condition in simulation is fully enough so far. However, present studies still have shortcomings. The 3D wind field construction in suburban environment has not been considered to combine with topographical effect. And method of the terrain construction also requires further advance to increase the accuracy and simplify the process. In this paper, the terrain data in DEM format is transferred and input into CFD software to construct wind field by applying programmed in-hou
Mentor(s): Xiuling Wang Graduate Oral Presentation The rapidly consuming of fossil energy leads to a foreseeing shortage of fossil fuels in the near future. Fossil fuels release respirable particulate and greenhouse gas when they burn. These facts demand mankind to develop renewable energy technology. Computational Fluid Dynamics (CFD) offers the best support or alternative to direct measurements. With the advancements in computer technology, powerful computers with large memory capacity now are available, thus it is now possible to simulate the wind flow around the wind turbine by different turbulent models. Motivated by above reasons, this research is carried out. The simulation of the turbulent and the complex flow around a rotating, and twisted airfoil (Direct Modeling) is a challenging task for CFD simulations. his paper describes CFD simulations of the NREL Phase VI turbine that was experimentally characterized in the NASA Ames wind tunnel. First, computations have been performed on the experimental base configuration of 0o yaw angle and a rotation rate of 72 rpm to validate the accuracy of the simulation. Then the simulated wake structure will be analyzed in detail such as the vortex formed at the tip and root of the blade, and the velocity distribution behind the rotor plane. Finally, yaw angles will be introduced to the model and the yaw effect will be analyzed in the aspect of velocity distribution, power loss and load fluctuation. Enhancement of Steel Industry Safety Training through Incident VisualizationJingsong Zhang and Neftali Arteaga Mentor(s): Chenn Zhou and John Moreland Graduate Oral Presentation Ironmaking and steelmaking are hazardous processes. Some of the most costly factors in industry are injuries and death resulting from workplace accidents. This project sought to develop an animated 3D visualization of a safety incident to be used for safety training. One of the main items being explored in this research is the use of 3D visualization to recreate a real incident, as opposed to some general or fictional incident. Using the virtual space of the 3D environment, it is possible to view the incident from multiple locations to provide additional insights such as what things looked like from the injured worker’s point of view, or from other key locations within the environment. Additionally, once an incident has been recreated, the environment and events can be modified to show how the incident could have been prevented. Leveraging these strengths of 3D visualization has potential to provide a new way of seeing how safety incidents occur, so they can be avoided in the future. Vertical Edger Longevity Extrapolation Based on Finite Element AnalysisYuanbang Sun and Mohammad Islam Mentor(s): Chenn Zhou, Bin Wu, and Guangwu Tang Graduate Oral Presentation A vertical edger is a critical component of the roughing mill, used to reduce the width of steel slabs. When a vertical edger experiences a failure, it directly affects the production of the roughing mill. The housing is designed to withstand significant force, but the maximum threshold for duration and intensity before failure occurring are unknown. In addition to the force, many other factors affect the remaining life of a component, and life prediction is difficult to conduct. Furthermore, new steels seem to be pushing the roughing mills harder than before, and it is crucial to know how far they can be pushed before components break. The purpose of this research is to simulate the edging process using Finite Element Analysis (FEA) model. By performing a numerical analysis of the components in a vertical edger, an improved understanding of the mechanical behavior and potential failures can be identified to improve safety.
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