Fuel Cell#

The Fuel Cell block simulates the fuel celloperation that converts the chemical hydrogen energy into electrical energy. The block is described by the following equations (1) :

\[E_{\mathrm{c}\mathrm{e}\mathrm{l}\mathrm{l}} =\mathrm{ }\mathrm{E}_{\mathrm{o}\mathrm{c}}-N_{\mathrm{c}\mathrm{e}\mathrm{l}\mathrm{l}\mathrm{s}}\mathrm{ }\mathrm{A}_{\mathrm{t}\mathrm{a}\mathrm{f}\mathrm{f}}\cdot \mathrm{l}\mathrm{n}\left(\frac{i_{\mathrm{f}\mathrm{c}}}{i_{0}}\right) \]

\[ \mathrm{T}\mathrm{ }\frac{\mathrm{d}\mathrm{V}_{d}}{d_{t}} +\mathrm{ }\mathrm{V}_{d} =R_{d}i_{\mathrm{f}\mathrm{c}} \]

(1)#\[ \mathrm{U}\mathrm{ }=N_{\mathrm{u}\mathrm{n}\mathrm{i}\mathrm{t}\mathrm{s}} \cdot \mathrm{ }\mathrm{E}_{\mathrm{c}\mathrm{e}\mathrm{l}\mathrm{l}} -R_{i}\mathrm{ }\mathrm{i}_{\mathrm{f}\mathrm{c}} -\mathrm{ }\mathrm{V}_{d} \]

Where:

\(E_{cell}\) - Nernst’s tension;

\(E_{oc}\) - idle voltage;

\(N_{cells}\) - Number of cells in the module;

\(A_{taff}\) - Tafel’s coefficient;

\(i_{fc}\) - current through the fuel cell;

\(i_0\) - rated exchange current of the fuel cell;

\(V_d\) - fuel cell capacitive voltage;

\(R_d\) - the sum of activation resistance and concentration;

\(R_i\) - internal resistance;

\(T\) - time constant;

\(N_{units}\) - number of modules activated sequentially;

\(U\) - voltage at the fuel cell output.

1. Properties#

Property	Default value	Description	Units of measurements
Open-circuit voltage	65.0	–	V
Tafel slope	0.23	–	V
Internal resistance	0.05	–	Ohm
Nominal exchange current	80	–	A
Number of cells per module	65	–	–
Number of series-connected modules	10	–	–
Activation delay	On	–	–
Activation resistance	0.005	–	Ohm
Time constant	10.0	–	s

2. Inputs and outputs#

Parameters	Input/Output	Description	Units of measurements	Port type
-	Input	–	V	Electronics
+	Output	–	V	Electronics

In order to see the connection capabilities of the block, you need to go to page Description of block ports