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fan powered by any heat source

by:Mingfa Tech     2020-01-07
How to build your own portable thermoelectric device with a quad rotor motor.
This project may not have an exciting impact on the world, but it is my first little brother to explain (
Hot electric fan)
It just has to be built.
It is much smaller than most similar projects, and the power unit at the top can be separated from the lower heat source base and used as an experiment in other areas.
What does it do?
It turns thermal energy into kinetic energy, looks good and sounds great!
Concept: it uses a thermoelectric generator module (TEG)
Power the motor with a fan.
Heat source (candle)
Heated aluminum plate => temperature difference generated on the module => power generation for the motor => increase the air flow in the radiator => increase the temperature difference => increase the power.
Without a fan, it will eventually stop generating electricity because the temperature of the radiator is almost the same as that of the flat panel.
Experimental Area: almost any heat source with sufficient temperature can be used to power the motor, which makes the experiment of this small device simple and interesting.
It is very sensitive to temperature difference.
I can run it in water with only 20 C differences (
23 C air temperature and 43C water temperature).
As can be seen from the video, it is powered by fire, hot water, food, and even used to cool the computer processor.
The latter was my idea when I created the first building in 2013 and people said to me it was impossible.
It can be used normally and stable, but it may be better with further optimization.
I don\'t think it can replace the normal CPU cooler, but it\'s a bit eco-friendly since it doesn\'t use the electricity on the computer.
More information on the last page.
Specifications: structure it only needs very few parts, easy to manufacture, you don\'t need any electronic knowledge.
All you need is some mechanical tools to cut, drill and polish aluminum.
Please read further if you would like to build it.
I think you can find everything on Ebay.
Estimated price.
Aluminum and bolts are not included in the price because it is basically scrap metal. Tools:Wire (
For fixing radiators)
If you use a 8mm motor, you need to have a 8mm center hole on the radiator.
Bottom aluminum sheet top aluminum sheet for design purpose if you have a printer and transparent filament like T-glase.
I used the Marriott copier 4 X printer to simplify the 3D software.
If you want it to be lower or higher, you can simply scale it along Z.
Link to model: printer settings: This module can be used in the computer to replace the traditional CPU cooler.
It only uses the heat of the CPU to power the fan, which in turn transfers hot air from the CPU.
It may not be efficient enough for a modern CPU, but it is more or less a proof of concept.
Since the fan speed is its own, it does not require sensors, electronic devices or motor controllers
Adjusted by CPU temperature.
Currently tested on AMD Athlon 64 3800, 2400 MHz single core, 89 watts.
Normal computer use is stable, but compared to the inventory cooler, I also did a 5 minute stress analysis with or without a motor fan.
Obviously, the fan helps to cool the CPU.
80x70x70mm radiator for inventory cooler (402g)
Add a big fan compared to my small device (
85g with motor and fan).
The last thing I tried was to use only small radiators without any TEG, but the result was exactly the same.
Surprisingly, TEG has a very good thermal conductivity and I can finally conclude that using TEG has a better cooling effect than not using TEG (
With equal build volume).
After the test, the CPU returned to the stable 37C and the fan speed was normal.
Note that I have not applied any downward force to the device, it is just placed at the top of the CPU, and if you are a computer builder you know it is not working very well.
The device is also much smaller than the inventory cooler, and the larger TEG and radiator may do better.
It would be great to see others do experiments with this!
Still, I won\'t be held accountable for any CPU damage.
The rated maximum temperature for this particular CPU is 69C, so I will not recommend this version as I do now. Update 1 (Second picture)
: Also added small radiator on the bottom plate for testing to get better cooling effect from left sideover air.
I did this to show that the parameters can be easily optimized further.
To be sure, during the test I removed the excess aluminum and the temperature increased to 75C as before.
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