Hydrogen-oxygen fuel cell#

The Hydrogen-oxygen fuel cell block simulates the fuel cell operationthat converts the chemical hydrogen energy into electrical energy.The block is described by the following equations: (1) :

(1)#\[\begin{split} E_{\mathrm{c}\mathrm{e}\mathrm{l}\mathrm{l}}=E_{\mathrm{o}\mathrm{c}}-N_{\mathrm{c}\mathrm{e}\mathrm{l}\mathrm{l}\mathrm{s}}A_{\mathrm{t}\mathrm{a}\mathrm{f}\mathrm{f}}\cdot \mathrm{l}\mathrm{n}\left(\frac{i_{\mathrm{f}\mathrm{c}}}{i_{o}}\right)\\T\frac{\mathrm{d}\mathrm{V}_{d}}{d_{t}}+V_{d}=R_{d}i_{\mathrm{f}\mathrm{c}}\\U=N_{\mathrm{u}\mathrm{n}\mathrm{i}\mathrm{t}\mathrm{s}}\cdot E_{\mathrm{c}\mathrm{e}\mathrm{l}\mathrm{l}}-R_{i}i_{\mathrm{f}\mathrm{c}}-V_{d} \end{split}\]

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;

$i_o$ – 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 measurement
No-load voltage	65.0	-	V
Tafel coefficient	0.23	-	V
Internal resistance	0.05	-	Ohm
Rated exchange current	80	-	A
Number of cells in the module	65	-	-
The number of modules connected in series	10	-	-
Has delay	On	-	-
The sum of activation resistance and concentration resistance	0.005	Available, when `Has delay` - `On`	Ohm
Time constant	10.0	Available, when `Has delay` - `On`	s

2. Inputs and outputs#

Parameters	Input/Output	Description	Units of measurement	Port type
Output	Output	–	–	Voltage

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