Definition of Thermal Energy and the BTU

[ramset]

smOky2
been enjoying all your contributions ,and this one is very interesting indeed ,[an association between frequency and heat ??]

Here is something which  is also frequency dependent [resonance too]  fascinating and perhaps has plenty of room for  improvements and "what ifs"

imagine getting one of your furnaces to howl and make power too ??

https://www.youtube.com/watch?v=F2cTgt9WEBE  [contribution from Tinsel at another thread]

respectfully
Chet K

[sm0ky2]

Thanks Chet


That is a 'thermal displacement engine'
Basically an advancement to Sterling Engine technology
Also called acoustic piston, thermo-acoustic resonator, etc.


This definitely opens the door for some more detailed
analysis of this device. Since we already have the math
available for thermo-acoustics, from these and from the
pulse rocket tech.


I need some time to convert my data into a format I can
plug in. I was heading in a whole other direction with this
before your post, thinking along the lines of convection and
thermal expansion of an air mass in an open cylinder.


What you just brought to the table, not only makes more sense
(to me), but is a lot simpler, physics-wise.
Eliminates the need for reiterating redundant equations.


So, if we have a situation like these engines or the pulse rocket,
It stands to reason that their knowledge was acoustic in nature,
From the very beginning, with the advent of fire......


These furnaces could possibly be the early stages of the ancient
acoustic stone art found all over the world??
(maybe that's too much of a stretch)


There is definitely a spacial aspect to the vortex as well as the
time or 'humm' of the furnace jet.
I can easily make it fail by going too far away from the proportional
relationships used by the cavemen.


Still trying to understand the how/why of that mess.
I broke it by making assumptions and trying new things.


So I'm experimentally searching for a hint of the right path
maybe if I play with different proportional dimensions of the
base dimensions (dimensions of the base portion) I can find the
acoustic cavity size(s) coherent with the foundation.
Having the wrong dimensions of a connected cavity disrupts the
process.


If we apply thermo-acoustics to that, we would call it
"Destructive Interference"??
Hmm


Let me set up some equations and see if I can figure out what
would be the situation if this were a giant thermo-acoustic /
thermal displacement engine.


Also, take a look at the old church organ pipes.
There's 2 ways those can be made


Half-wave or full wave
If this were viewed like that, it kind of resembles a full wave organ pipe
If we were to take that and apply it to the queens chamber of the great pyramid
And the smaller ante-chamber, and the similar situation found in Malta
I should be able to raise my second chamber to a half-wave....
I'll make a video of that later, whether or not it "works".
Before I tear it down and start over.


I was trying to hit the 1/4 wave, but either that's NOT the right approach,
or the small dimensions require more accurate construction than my hands
like to perform.... There's something I seem to have missed in the early
stages of schooling, when it comes to sound waves. Some people get this
music stuff, I keep trying to relate it to emf, but there's something I'm missing.


I tell myself it's to do with the mass of air, and moving it around,
but it's probably something more humbling, one of those 'make you feel stupid
when you hear it' kind of things....


Anyways, thanks again for your contribution, it seems like the right approach.

[sm0ky2]

An audio engineer just sent me this


Wavelength =1/(2xFreq)


He said basically if we divide 1 by the dimension
Then double that, then divide 1 by that number
We get the next dimension?


And that all dimensions larger or smaller on that list
Will "work". (I guess that means we take half instead of
double to go downwards)


He said we don't really need to know if it's A,B,C,D,E
Sharp/flat, or all that jazz
He said get a guitar tuner if I really wanted to know.


But he said
Just convert the size to freq. do your math from there,
Then convert it back to size.
(can anyone tell me why I don't just divide the inches??)
this is why I'm not a musician.....


Anyways, looking at the caveman furnace


1/8 = 0.125, x4, divide it back out
I get =4 (32, divided by 8 to reduce)
We already knew that from the caveman proportions


It stands to reason I could just x or / the measurement
But it doesn't work like that for some reason


Maybe that's why every sound isn't resonant to a 1-inch cavity?
or maybe a 1m cavity?
Or a cavity of 1 kos?


Is there a base wavelength for sound?
Like the plank constant?

[sm0ky2]

The math is all stupid on this, I'm coming up with something like
85-92Mhz?


Unless there's some kind of Schumann effect
Which would make this the caveman TPU

[ramset]

Sm0ky2
the beauty is the simplicity [in your caveman furnace] it did however leave me wanting for a smaller version to play with.

and then I noticed Tinsel's contribution [serendipity ??]

would be hard to imagine a simpler device to Fuss with and try all manner of ideas

its like a gift to the community IMO .

and as you so rightly point out.. opens other "easy peasy" places to play ..cavity resonance
for one.

and here is another interesting thought experiment from our friend Johan 1955

https://www.youtube.com/watch?v=FjO3OipwlKc

creating a water hammer effect thru Vacuum resonance [minimal input] to make an entirely different source of heat ......sono/water hammer ?

But who knows ? this huge pressure might manifest in these other experiments too ??

you are very inspiring Sm0ky2
and it is indeed contagious

respectfully
Chet K