Preparing the fan module:
Remove the fan module from its box and
insert the fan blade onto the motor axis.
Ensure the connection is tight.
Note: At this moment, the temperature difference between the two sides should be more than 70
℃.
The temperature difference is proportional to the generated power. A 70
℃
difference of temperature is
enough to power the fan for a long time. The power is generated due to Seebeck’s effect which turns
heat into electricity. There is a heat exchange between the two heat sources due to temperature
difference. The hot water will progressively cool down and the cold one ill be heat up. After a long
time, both sides will reach the same temperature.
Power the LED module with two heat sources
Connect the wires into the LED module plugs and into
the thermoelectric system sockets. Ensure to respect
the color code. You will see that the LED starts to flash
immediately.
Experiment 2:
Do the same as in experiment 1, but this time connect the renewable energy monitor in order to be able to
see the generated power. After connecting the wire and the fan, write every 2 minutes the temperature of
each heat sources and the corresponding value of power which is generated.
Experiment 3:
a. Do the same as in experiment 1 but connect the wires on the fan basis on the opposite sense than
the one showed by the color code. You will see the fan start to rotate on the opposite sense. It is due to
the motor ability to run when it is crossed by a current, no matter which direction it came from.
b. Disconnect the fan and connect the LED module to the thermoelectrical generator. Ensure to respect
the color code. You will see the LED light on then disconnect wires and plug them in the other sense.
The LED will not light on because the current generated by the Peltier’s module (central component of
the thermal generator) goes only in one direction and LED only allow the current to pass in the other
sense.
Experiment 4:
a. Connect one thermocouple on each side of the Peltiers module, on the middle of the walls inside the
tanks.
b. Connect the electrical generator into the plugs of the thermoelectrical system. Input different current
and write the value of the wall temperature. Wait 5 minutes between the time you increase the current
and the moment when you write the temperatures.
Power the fan with two heat sources:
Connect the wires into the fan plugs and into the
thermoelectric system sockets. Ensure to respect the color
code. You will see that the fan start to rotate immediately. It
is due to the Seebeck’s effect which turns heat into
electricity.
Time [minutes]
T
hot
[°C]
T
cold
[°C]
Temperature difference [°C]
Generated power
[W]
0
90
10
80
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
Note: The temperature difference between the two water tanks will be narrowed with the time going, the
electricity produced will also be reduced. The fan or LED light will operate in a weak way gradually until it
stops.
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