A thermoacoustic refrigerator having a relatively small size which utilizes one or more piezoelectric drivers to generate high frequency sound within a resonator at a frequency of between about 4000 Hz and ultrasonic frequencies. The interaction of the high frequency sound with one or more stacks create a temperature gradient across the stack which is conducted through a pair of heat exchangers located on opposite sides of each stack. The stack is comprised of an open-celled material that allows axial, radial, and azimuthal resonance modes of the resonat...
1. A thermoacoustic refrigerator, comprising:a first resonator defining an interior chamber;a first high frequency driver disposed in communication with said first resonator for generating at least a portion of a first standing wave within said interior chamber;a first stack disposed within said interior chamber having a first side and a second side, said first stack formed from a fibrous material; andfirst and second heat exchangers, said first heat exchanger positioned adjacent said first side of said first stack and said second heat exchanger position...
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