2014. november 26., szerda

1300 Subscribers on YT! THANKS!!! :)

Thanks very much to everyone, who subscribed my channel
watched and shared my videos
or followed my blog.

Only one word:

Special thanks to Didier Desbordes who
supported my work on pay-pal!!!

I ordered some staff for my next project:

2014. november 18., kedd

Thermoacoustic refrigeration part 1.

New project first video.

Simple construction, without resonator tube.
Not any wavelength calculation for length of tube, or buffer volume.
This is an ALPHA type free piston (!) heat pump with Stirling cycle in the stack!
That is all what I need to write to you actually.

2014. november 10., hétfő

Standing wave thermoacoustic engine with mechanical resonator

What is the mechanical resonator?

This is a simple solid piston with adjustable spring, or back buffer volume.
The mechanical resonator can replace the acoustic resonator easily.
"Simulation calculations show that the mechanical resonator dissipates 40 % less 
acoustic power than the acoustic one." 

Wouw! :)

How we can make one?
So simple but
some basic information first.

As you can see on this picture (FIG. 1), if you need to close a thermoacoustic standing wave engine, then the closed resonator part (right side) should be same length as left side, the sound generator base.
The whole system is a half wavelenght thermoacoustic engine.
The stack's center on the λ/8 exactly.

But what we can do with a mechanical resonator?
We can replace the whole resonator tube length( λ/4=4/8 of whole tube length) +  the volume between the cold heat exchanger to the resonator tube ( λ/16= 1/8 length).
So what we can do?
We can replace the whole length 5/8th part.
That is nearly 2/3 of full length!
After we get a short engine like this:

Where the 104 is a buffer volume. This volume help for the gas flow going trough the 112 stack
 also the 108-110 heat exchangers.
114 is the piston and the back side is a generator also "gas spring volume", or solid spring of course.


We know "everything" to make a simple TAMR.

I made a short DIY video for you how do you make your first model from ordinary materials.

After I made another model from a big diameter test tube and accordion piston.
That was so speedy, strong and simple of course.

The engines frequency was lower than original because the weight/spring tension was different.
Not optimal, but the engines are works with an enough frequency for me.
I hope you enjoyed!
Please share and vote my videos and subscribe my Youtube channel.
See you soon!