High power soon with the membrane Stirling engine !
My engines 3:39
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I show the development of the membrane power extraction unit for the thermoacoustic Stirling engine and its self-starting ability to simplify the generation of cheap electricity for everyone !
If you want to support me you get access to exclusive content: https://www.patreon.com/c/Stirlingengines https://www.youtube.com/channel/UCie-_1q_BTL_cpPN_6f0gHw/join
For regular updates and a discussion forum visit: https://ownenergy.org/
Thanks to Baptiste (alias Olympio) we now have a Discord server: https://discord.com/invite/TDABS5z2mT
It would be very nice if we could discuss there everything about Stirling engines, 3D printing and more, thank you very much Baptiste.
The thermoacoustic Stirling engine is getting better and better thanks to the efforts of many developers.
It is now possible to print the entire power extraction unit with a 3D printer.
The goal of an easy-to-build, open-source engine for cheap electricity generation for everyone is getting closer and closer.
The latest test runs produced an interesting surprise, offering hope of a huge improvement in performance in the near future.
The new membrane-based design is easy to print, very lightweight, and can be tuned to the thermoacoustic frequency.
Unfortunately, my Arduino test bench has a loose connection that I couldn't find right away.
That's why I use a laser measuring device and an oscilloscope to measure the frequency.
To do this, I quickly wound a very simple coil through which a magnet attached to the membrane can induce a voltage.
As expected, the frequency is higher for smaller moving masses.
At the lowest weights, the membrane oscillated at over 2,600 vibrations per minute—faster than ever before.
I really need to connect the pressure sensor to the oscilloscope now and compare it with the voltage waveform.
These are all excellent results, but it gets even better!
During the test runs with the lightest masses, with the burner turned off and only a warm heater, the engine started on its own.
Even with heavier weights, the oscillation started on its own once the heater was hot.
This greatly simplifies the process of pressurization, which is essential for improving performance.
With the housing then closed, there is no need to develop a complex starting device.
First, the entire engine must be made completely airtight.
To do that, I have to rebuild the entire feedback loop.
This time, it will be entirely 3D-printed using clamping flange connections, which are highly practical and completely leak-proof.
They can also be printed very easily.
A compact linear generator for power measurement must be designed and integrated into the closed back of the membrane.
I'm really curious to see if the boost pressure will actually deliver the expected performance increase.
The holder and the membrane itself still have a lot of potential for improvement.
Experiments with stiffeners in the center have not worked so far because the membrane is stretched too tightly.
I'd also like to experiment with different types of membranes and cast or form them myself.
Do you have any ideas about what an effective membrane might be like?
Please post it in the comments, on Discord, or on the forum at www.ownenergy.org.
As always, I'd like to hear your feedback, suggestions, and ideas.
If you'd like to support the project, help us with the development and become a member on Patreon or YouTube.
Thank you very much for your interest!
Thanks for the background music:
Song: Jim Yosef - Eclipse [NCS Release]
Music provided by NoCopyrightSounds
Free Download/Stream: http://ncs.io/eclispe
Watch: • Jim Yosef - Eclipse | House | NCS
If you want to support me you get access to exclusive content: https://www.patreon.com/c/Stirlingengines https://www.youtube.com/channel/UCie-_1q_BTL_cpPN_6f0gHw/join
For regular updates and a discussion forum visit: https://ownenergy.org/
Thanks to Baptiste (alias Olympio) we now have a Discord server: https://discord.com/invite/TDABS5z2mT
It would be very nice if we could discuss there everything about Stirling engines, 3D printing and more, thank you very much Baptiste.
The thermoacoustic Stirling engine is getting better and better thanks to the efforts of many developers.
It is now possible to print the entire power extraction unit with a 3D printer.
The goal of an easy-to-build, open-source engine for cheap electricity generation for everyone is getting closer and closer.
The latest test runs produced an interesting surprise, offering hope of a huge improvement in performance in the near future.
The new membrane-based design is easy to print, very lightweight, and can be tuned to the thermoacoustic frequency.
Unfortunately, my Arduino test bench has a loose connection that I couldn't find right away.
That's why I use a laser measuring device and an oscilloscope to measure the frequency.
To do this, I quickly wound a very simple coil through which a magnet attached to the membrane can induce a voltage.
As expected, the frequency is higher for smaller moving masses.
At the lowest weights, the membrane oscillated at over 2,600 vibrations per minute—faster than ever before.
I really need to connect the pressure sensor to the oscilloscope now and compare it with the voltage waveform.
These are all excellent results, but it gets even better!
During the test runs with the lightest masses, with the burner turned off and only a warm heater, the engine started on its own.
Even with heavier weights, the oscillation started on its own once the heater was hot.
This greatly simplifies the process of pressurization, which is essential for improving performance.
With the housing then closed, there is no need to develop a complex starting device.
First, the entire engine must be made completely airtight.
To do that, I have to rebuild the entire feedback loop.
This time, it will be entirely 3D-printed using clamping flange connections, which are highly practical and completely leak-proof.
They can also be printed very easily.
A compact linear generator for power measurement must be designed and integrated into the closed back of the membrane.
I'm really curious to see if the boost pressure will actually deliver the expected performance increase.
The holder and the membrane itself still have a lot of potential for improvement.
Experiments with stiffeners in the center have not worked so far because the membrane is stretched too tightly.
I'd also like to experiment with different types of membranes and cast or form them myself.
Do you have any ideas about what an effective membrane might be like?
Please post it in the comments, on Discord, or on the forum at www.ownenergy.org.
As always, I'd like to hear your feedback, suggestions, and ideas.
If you'd like to support the project, help us with the development and become a member on Patreon or YouTube.
Thank you very much for your interest!
Thanks for the background music:
Song: Jim Yosef - Eclipse [NCS Release]
Music provided by NoCopyrightSounds
Free Download/Stream: http://ncs.io/eclispe
Watch: • Jim Yosef - Eclipse | House | NCS
Playback is via YouTube's official embedded player. Data from YouTube; Exumo is not affiliated with YouTube.