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Thermoacoustic Heat Engine

post #1 of 6
Thread Starter 
EDIT:-177C in seconds... (very end of video)
HERE: http://www.youtube.com/watch?v=HbXJcRJNVcM

http://en.wikipedia.org/wiki/Thermoacoustic_heat_engine

http://www.aster-thermoacoustics.com/?cat=13

Has anyone heard of these? I am very interested as to how they work. Not sure if I understand correctly.


The standing wave in the entire tube, pressurizes the working fluid in the stack, creating adiabatic process, moving heat?



More info: http://www.coolsound.us/work.html

".The resulting pressure fluctuations can be designed to occur hundreds or even thousands of times per second and can generate temperature differences well in excess of 100 degrees Fahrenheit."
Edited by SkeeterSkeeter - 3/14/13 at 6:34pm
    
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post #2 of 6
I don't understand this...but I think I'd like to....could be very promising.although they don't seem to have had huge success from what limited stuff I've seen on the web.

So the temp difference is being caused by the compression/decompression of gas.....wonder if they were to use a refrigerant type liquid instead of gas so that the compression/decompression caused phase change rather than just volume change in the gas...could have the potential to exchange much more energy and so produce higher temp differentials.
Edited by technogiant - 3/16/13 at 2:55pm
post #3 of 6
Thread Starter 
Quote:
Originally Posted by technogiant View Post

I don't understand this...but I think I'd like to....could be very promising.although they don't seem to have had huge success from what limited stuff I've seen on the web.

So the temp difference is being caused by the compression/decompression of gas.....wonder if they were to use a refrigerant type liquid instead of gas so that the compression/decompression caused phase change rather than just volume change in the gas...could have the potential to exchange much more energy and so produce higher temp differentials.

So use a phase chane evap the same manner but have another loop, the secon loop happens after the working lfuid enter the evap, the second loop draws a huge vacuum in the evap after so much liqud has entered to gasify the fluid instantly?
    
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post #4 of 6
I was thinking the acoustic tube could be filled with refrigerant fluid, you'd have to have a vapor/gas space at the opposite end to the vibrating diaphragm as liquid is not compressible, so when the diaphragm vibrated it would move the fluid back and fore through the central constrictor by compressing the gas at the far end in the vapor space.

Movement of the fluid back and fore through the restrictor would cause it to phase change and build the temp difference......but then again I know nothing of this and may be talking balderdash....lol biggrin.gif
post #5 of 6
Skeeter this post has just given me an idea for a powered heat pipe........I've stared a new post here http://www.overclock.net/t/1375413/powered-heat-pipe
post #6 of 6
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Quote:
Originally Posted by technogiant View Post

Skeeter this post has just given me an idea for a powered heat pipe........I've stared a new post here http://www.overclock.net/t/1375413/powered-heat-pipe

Replied, lets do it.
    
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