Fuel Cell Level 0

Modeling a simple Fuel Cell.

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This simple fuel cell model is especially usefull when you quickly want to implement a fuel cell in your application without knowing the exact physical details of the fuel cell. Only the nominal voltage and current have to specified, as well as the open circuit voltage and the series resistance.

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The figure above shows the level 0 fuel cell model characteristic. Along the X-axis the current drawn from the fuel cell is displayed. The y-axis is the voltage per cell. By defining the number N of cells in series, the total voltage produced by the fuel cell is defined. The voltage of the fuel cell is depending on the current drawn form the fuel cell as indicated by the graph above.

The Fuel Cell library block is selected from the library at Components/Library/GreenEnergy/FuelCell

The Fuel Cell block has six parameters, which can be taken from the data sheet of hte fuel cel directly.

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Parameters of the level 0 Fuel Cell model:

The simulation below shows the characteristic of th level 0 fuel cell when loaded with a time varying load current. The fuel cell is connected to a load resistance and a controlled current. The load current controlled by multiplying the output form the block with 2m. The total simulation time is 1000 seconds and therefore the current increases form 0 to 2m*1000=2 amperes.
The time delay of the fuel cell is 1 second and the simulation time step dt is equal to 100ms. Therefore when starting the simulation, the maximum voltage of Eoc is nearly reached.

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The fuel cell electric terminals are on the right side of the block. The top connection is a measurement node and gives the value of the current drawn from the fuel cell. You can use the top connection for reading the value of the current that is flowing out of the fuel cell.

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