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!

2014. július 15., kedd

Manson engine's modified as "Metronome"

Hi guys!

I start to make a new engine from my old Manson fan engine on the last weekend.
It was really rusty and it looks like something scrap there.
But the engine base was pretty good condition!
I was lucky!

I took off the fan, also the crank and rod.
Cutted off the tube where was the valve originally.

After I connected to the pipe a 62 cm long
ID: 7 mm tube.
It was the load for the "Metronome" effect.
Do you remember for my earlier post?
There is the working method.

Anyway...the engine works well.
The torque is pretty good 
and if I can change the tube with a spiral silicone tube 
then it will be much more compact. 

I need to make a cold side ventillation version
because then the engine could cooling down himself.
And later I can pressurise it!

2014. július 4., péntek

A weird hot air engine: "Metronome"

My new working office is so busy...sorry!
But the next post will be very interesting for you! :)

My friend Simi112's developed an engine what I called "Metronome".
The engine had a good torque, and the frequency was so stable.

He modified a water piston Ringbom engine.
The water piston is the power piston in a basic Ringbom constructions as you know.

Simi112 changed the pistons, and created a big diameter piston to move the displacer, 
and a smaller one with water in a tube for phase changing.
The engine works well!
(check below the video)

In March of 2014 I've seen an interesting engine on Dreisotech's youtube channel.
He called it Very Simple High Frequency Engine (VSHFE).
This engine is same as Metronome the only different is the phase changer piston,
 because the piston is air here.
This construction is faster than the water piston version.
When I showed the video to Simi112, we start to develope this construction
and we found a little suprise there.
The tube could be tune the engine's frequency
also we can tune up the whole engine to a resonant frequency,
where the amplitude is maximised, and the torque is great!
So this engine is a moving displacer thermoacustic engine too!
Is this possible?

But the cycle is really changed!
Not Stirling as in a Ringbom!

The tube has a greater resistance than the power piston and the engine works closely as a Manson engine.
The tube works like a gas-diode valve.
It looks like a fully open engine, but when the pressure increase in the cylinder, then the gas push out the power piston first, and after can „wide open” the gas-diode.

When the "valve" is "opened", the gas piston  start to move out with a great momentum and created a vacuumised cylinder after start to cool down the gas in the cylinder.
When the inward phase coming and the gas diode "open" again 
then the gas piston create a pressurised section in the cylinder before the gas start to heat up!

It is really interesting and strange.
Because the power piston has an increased power under the whole strokes as like Manson!!!
But when the "valve" is "open" 
then the gas piston pre-vacuumise, also pre-pressurise the cylinder in the working method.

The Manson has only pressure relief sections!

So...we have an engine with Manson cycle (more or less) with a bigger working pressure intervall.

I'll try to show you what I mean about the p-V diagram

Is it real?
What do you mean?

I created a video what's happening in the engine:

My friend Simi112/ Metronome Heat Engine
made videos from his experiments.

Please share this informations!
I hope somebody can help me about the engines p-V diagram,
because I'm not pretty shure in.
It looks like a new thermodinamical cycle
and a NEW hot air engine construction.

See you soon!


2014. április 15., kedd

1000!!! Thanks very much! :)

1000 subscribers on my youtube channel after 6 and half years! 
:) Thanks everyone for sharing! Special thanks to Didier Desbordes for supporting my work!!!

2014. április 11., péntek

Rhombic drive VS. My 105° "L" yoke drive system

Hello guys!

It has long been thinking about a solution what modelling the rhombic-drive movement, 
without any complicated manufacturing.

I was sure it's possible!

First I changed the Ross yoke mechanism.
"T" to "L"
Such an interesting alphabetical magic!

After I calculated the shafts positions, and the angles.
Next step was I made a rhombic drive in Solid Works 3D
and saved 90 frames/sec pictures.
I created my mechanism in same frame rated.
Here is the solution how I can see the similar thing also the different things
about this two methods.

If you interested my work click on my youtube channel.

Here is the latest movie, where I can show you this two drive mechanism in a video.
I changed the angle of my "L" shaped yoke last time 90 to 105 degrees,
because the phase angles was better.

What do you think about it?

2014. március 6., csütörtök

Thermoacoustic traveling wave engine

I know you are really need to see my new designed Manson or KCE engines, but my life is so complicate actually, so I'm sorry about delay it will coming later a little bit.

But, my friend simi112 (YT nickname) started a series of thermoacoustic engines.
I followed his work and after we discussed the engines, working methods.
Anyway...here is my first designed traveling wave engine nearly Fellow's TAC generator.

Not perfect yet, but it was the second test run.
The design is so simple!

I made some pictures of assembly

As you can see I used first an aluminium tube for the hot side, 
but the first test run finished with a big hole on this tube...:(
After I changed it for a stainless steel hotdog maker's tube.

I'll show you How it's works?! on my next video!
See you soon!

2014. január 8., szerda

Teeter, table seesaw Stirling engines

Simple engines for home design, or relax time.

Self-balanced water piston design

Solid piston design with adjustable balance weight

2014. január 2., csütörtök

Rotary Manson ( my old ideas)

Hi all,
here is my new post from my old ideas about rotary type Manson engine.
All engines are on my photobucket profile few years ago, but I share these ideas here now.

Closed cycle regenerative rota-Manson with hot side ventillation:
V 2.0 with tube in tube rotary valve:

Tandem type hot side ventillation rota-Manson engine:
Original cycle rota-Manson engine with inside crankshaft (water pump):