Dissertation > Excellent graduate degree dissertation topics show

Research on Anode Two-phase Flow for Fluid of Micro Direct Methanol Fuel Cell

Author: LengJiaXing
Tutor: LiuXiaoWei
School: Harbin Institute of Technology
Course: Microelectronics and Solid State Electronics
Keywords: μDMFC Lattice Boltzmann Method gas-liquid two-phase model the COMSOL visualization
CLC: TM911.4
Type: Master's thesis
Year: 2012
Downloads: 7
Quote: 0
Read: Download Dissertation

Abstract


Micro direct methanol fuel cell (Micro Direct Methanol Fuel Cell, μDMFC) have a lotof great advantages,For example, methanol sources are clean, abundant and convenient storage, the processof Chemical reaction always has the low temperature. The fuel cells can be integtated intobattery pack,and can be made into micro-batteries in order to take along. They have alonger working time than conventional batteries and less pollution. μDMFC is most likelyto replace conventional batteries to become one of the new power supply for portableelectronic devices.In this thesis, we use the Lattice Boltzmann Method(LBM), and we investigative themovement of the bubbles generated inside the battery in the electrochemical reactiontheoretically. Thus, a theoretical guidance for the optimization of cell structures as well asadjusting the reaction conditions are provided. So we can reduce the design cycle time andcost of the battery effectively. Therefore, the internal two-phase flow in micro directmethanol fuel cell research is particularly important.In this thesis, COMSOL software is applied to simulate gas-liquid two-phase flow andmass transfer in detail, and visualization experiments are used to verify the correctness ofthe simulation results. The visualization experiments also Analysis a variety of effectsunder the microscale which is different from the normal scale and large-scale conditions.The results showed that, in terms of the structure, the pore size and hydrophili of flowchannel as well as the cross-section shape have a great influence on the bubble dynamics.Secondly, the effect of imports and exports display that the structure of import and exporthave a great impact on the bubble removal. In the terms of reaction conditions, we usevisualization experiments to research the flow rate and concentration of methanol have agreat impact on the effective exclusion of carbon dioxide bubbles. And the gas remain timein the flow channel, and the detailed relationship between the bubble radius and structuralparameters as well as working conditions have been explored. The simulation method hasidentified optimized structures and the experimental conditions which have the mosteffective way of bubble excluded. The experiments results are expected.This thesis provides a theoretical basis for the optimized design and application ofmicro fuel cells effectively and can save the cost and time during the process of design.

Related Dissertations

  1. 3D Visualization Research of Medicial Ultrasound Image,TP391.41
  2. Design and Implementation of the Growing Visualization System for Wheat Population,S512.1
  3. The Airborne LiDAR and LiDAR Points-cloud’s Quick Processing Method,TN959.73
  4. Using Drill Data Achieve Orebody 3D Visualization,TP391.41
  5. Minging Design on the Guard Coal Pillars and Deformation Monitoring and Data Processing of the Shaft,TD822.3
  6. Study of 3D Stratum Modelling and Visualization Method Based on MPI,TP391.41
  7. Research on Layer Rock 3D-Modeling and Visualization Method,TP391.41
  8. Research on Visualization of Mining Subsidence and Application in Stability Evaluation of Construction Land,TD325
  9. Numerical Simulation of Coal-Gas Coupling in Coal Road Heading Face of Driving by Blasting,TD712
  10. Visual Simulation System of Mine Ventilation Based on OpenGL,TP391.41
  11. Study on Similarity Scale-up Model for Mixing Section of Two-Rotor Continuous Mixer,TQ330.43
  12. Research on the Application of 3D-GIS to Flood Route Visualization Based on ArcGIS and SketchUp,TV123
  13. The Lattice Boltzmann Simulation of Gas-solid Flow in a Driven Cavity,O359
  14. Study of Visualized Data Processing System for Computerized Flat Kniting Machine Based on ARM9,TS183
  15. Experiment Research and Numerical Simulation of An Under-low Specific Speed Centrifugal Blower,TH442
  16. Design and Development of Three Dimensional Modeling and Simulation System for Digital City,N945.12
  17. Research and Implementation on Visualized Monitor Technology for Indoor Real Time Location Systems,TP277
  18. Based on the international view of inter-domain routing monitoring and trend visualization,TP393.02
  19. Map of Network Security Situation Based on Parallel Coordinates,TP393.08
  20. Study on Deposit Simulation and Mining Visualization Design Technology of Sedimentary Bauxite,TD862.5
  21. The Research of Three-dimensional Laser Scanning Techniques in 3DGIS Modeling and Visualization,P208

CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Chemical power sources,batteries, fuel cells > Fuel cell
© 2012 www.DissertationTopic.Net  Mobile