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Connect the wires to the fuel cell:
a. Place the fuel cell in front of you so three plugs are facing you.
b. Connect the one of the red wires to the lefthand red plug in the front. Connect the other end to the
lefthand plug on the other side of the cell.
c. Connect the black wire to the central plug and remaining red wire to the righthand plug in the front.
Prepare the fan module:
Insert the adapter into the fan's motor axis. Push the fan blade onto the adapter and ensure the connec-
tion is tight.
Power the fan with the salt water fuel cell:
a. Connect the loose end of the long black to the black socket on the fan module, and the loose end of the
long red wire to the red socket on the fan module.
b. You will notice that the fan will start to rotate as soon as the wires are connected to the fan module. The
salt water fuel cell provides a minimum of 4 hours of power.
3
Experiment 2: Using different salt concentrations
Follow the "preparing the fuel cell" instructions for Experiment 1 but this time connect a multimeter
rather than the fan. Measure the output, current and voltage of the fuel cell for the different salt
concentrations as in the table below. Remember to clean the fuel tank every time you change the salt
water. Record your results.
mass [g]
Salt concentration [%]
2
4%
5
9%
10
19%
15
28%
20
38%
Experiment 3: Using different water temperatures
Follow the directions for Experiment 2 but this time, add 15g of salt to hot water (90°C) and allow the
mixture to dissolve. Once that's done, heat the water in order to reach the different temperatures shown
below and then measure the output current with a voltmeter. Remember to clean the fuel tank each time
you change the saltwater. Record your results.
Solution temperature [°C]
Current [A] / Voltage [V]
25
45
65
80
90
Experiment 4: Using different fuel volume
Prepare the saltwater as in experiment 1 but this time connect a chronometer to measure the running
time with different concentrations. Record your results.
Volume poured in the fuel tank [mL] % of fuel tank volume Current [A] / Voltage [V]
5
7
10
12
15
Current [A] / Voltage [V]
25%
35%
50%
60%
75%
4
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