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Modeling and Simulation of Semi Fuel Cells

Amiri, Morteza | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43961 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical & Petroleum Engineering
  6. Advisor(s): Pishvaei, Mahmoud Reza
  7. Abstract:
  8. The usages of Autonomous Underwater Vehicles (AUV) are limited due to the lack of suitable portable energy sources. Researches show that chargeable batteries and fuel cells are the most appropriate energy source for AUVs in near future. The main purpose of thesis is the modeling and obtaining the governing equations for Aluminum/Air batteries containing seawater, the so-called semi fuel cell. The steady state governing equations include Navier-Stocks equations (Hydraulic-Boundary layer), chemical ionic species mass balance at boundary layer velocity field, electrochemical equations in the electrolyte and the electrode surface, equations of motion of the hydrogen bubbles and equations for the electric current density distribution. After discretizing of very complicated partial deferential equations of the process, computer simulation model has been implemented for a prototypical battery. Finally cell operation are predicted and effective parameters have been determined (sensitivity analysis survey) through simulation runs. For instance, most appropriate electrolyte solution for use in seawater batteries is a solution containing 12% NaCl (Saline). However, conductivity of seawater is less than its alkali electrolyte, hence KOH is added to modify the ionic conductivity (decreasing the ohmic resistance). The results show that the important effective parameters in operation are electrolyte composition (seawater), Aluminum anodic dissolving, structure and arrangement of electrodes and electrolyte inlet velocity (flow rate). Thus, some advises are given for modifying the electrolyte to reach cell optimum operation and repel anodic dissolving
  9. Keywords:
  10. Sensitivity Analysis ; Semi Fuel Cell ; Aluminum/Air Batteries ; Aluminum Anodic Dissolving ; Semi Fuel Cell Simulation ; Alluminium Batteries with Seawater

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