02-03-2012, 05:00 PM
Thermoacoustic Refrigeration
[attachment=17911]
How it works
Moving coil Loudspeaker
Inside 2 magnets with metal coil between them, current is induced causing coil to move
Creates sound waves up to 200 dB!
Resonator—where gas cooling and compression take place
Uses inert gas, commonly Helium
Stack
Series of small parallel channels through which pressure and velocity of waves change
In between the heat exchangers
Heat Exchangers
Hot heat exchanger to remove excess heat
Cold heat exchanger for refrigeration
Applications
Ben & Jerry’s
Ice cream storage containers
200 L at 18 degrees Fahrenheit
U.S. Navy
Wants acoustic refrigerators for submarines
Refrigerant leaks on subs are a deadly problem
With acoustic refrigerators, no harmful fluids
