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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 39128 (06)
- University: Sharif University of Technology
- Department: Chemical and Petroleum Engineering
- Advisor(s): Pishvaie, Mahmoud Reza
- Abstract:
- The advent of maturing fuel cell technologies presents an opportunity to achieve significant improvements in energy conversion efficiencies at different scales and environmental conservation simultaneously. This work deals with modeling, simulation and control of planar solid oxide fuel cell with internal reformer. The presented model is based on conservation laws (mass, energy, and momentum), besides an electrochemical model with all sorts of voltage losses (ohmic losses, activation overpotentials, and concentration overpotentials). Methane steam reforming, water-gas shift reaction, and hydrogen oxidation are the main reactions in this modeling scheme. The obtained governing equations lead to a set of differential-algebraic equations (DAEs) and obviously the solution will be challenging due to non-homogeneous phenomena acting in the solid oxide fuel cells. The system of equations was solved by the method of lines, where the finite difference method has been used as the spatial discretization method. It was done in MATLAB®/Simulink® environment using the ode23tb solver. In this work different control structures were examined and justified. Results represent that inlet fuel flow is capable of controlling either temperature or voltage in solid oxide fuel cell but inlet air flow cannot do the process alone. Although control results were not verified by experimental data, but static and dynamic simulation results have a good agreement with other published results
- Keywords:
- Fuel Cell ; Simulation ; Control ; Line Method ; Solid Oxide Fuel Cell (SOFC)
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