1741Views4Replies

Author Options:

How can I build an efficient thermoacoustic device with household materials? Answered

For a while now, I have been trying to build a thermoacoustic device with the following specs:
-Can run with a temperature difference at around 100 degrees Celsius (ice on one end, boiling water on the other end, but it won't actually work with water)
-uses normal air for the working fluid
-constructed out of available household materials (or anything I can find at a hardware, office, or similar store)
I have tried jamming coffee stirrers in a PVC pipe with copper wire serving as the heat sink, alternating layers of foil and two-sided tape, and for the third & recent attempt, newspaper jammed between two peg-boards (untested, but unlikely to work).

Discussions

The forums are retiring in 2021 and are now closed for new topics and comments.
0
Michael_Everett_Feder
Michael_Everett_Feder

Answer 11 years ago

I want to use it to produce sound at a very low frequency.

0
cyberpageman
cyberpageman

11 years ago

I don't know if 100 deg C is enough of a temperature differential.  The reference http://www.osd.rutgers.edu/gs/06papers/Thermoacoustic.pdf  talks about the "critical temperature."  I haven't tried to solve the equation, but if you want to take a look at it, it might give you some useful numbers. It also has some good references.  With care, it should be possible to build a device out of household materials--there is nothing exotic in the manufacture, but the spacing seems fairly critical.

If you get one to work, please make an Instructable on it.

0
killerjackalope
killerjackalope

11 years ago

What exactly do you want this device to do? Because it sounds like a project I have sitting here, just waiting for me to get it to go, except I'm not even sure if it's the same thing, both are malevolently simple but clearly witchcraft...