Thermoacoustic Device

Abstract

A thermoacoustic device 1 for reliably generating standing and traveling waves, which have a large sound pressure, in a loop tube, has a loop tube 2 in which a working fluid is sealed; first stacks 3 a , each of which has a plurality of communication paths 30 along a heat transportation direction and is provided between a first high-temperature side heat exchanger 4 and a first low-temperature side heat exchanger 5, which are provided in this loop tube 2; and a second stack 3 b which has a plurality of communication paths 30 along a heat transportation direction and which is provided between a second high-temperature side heat exchanger 6 and a second low-temperature side heat exchanger 7, which are provided in the loop tube 2, and in the thermoacoustic device 1, self-excited standing and traveling waves are generated by heating the first high-temperature side heat exchanger 4, so that the second low-temperature side heat exchanger 7 is cooled by the standing and traveling waves. The first stacks 3 a each provided between the first high-temperature side heat exchanger 4 and the first low-temperature side heat exchanger 5 are provided at a plurality of positions which are in the vicinities at which the phase of change in acoustic particle velocity is the same as the phase of change in sound pressure.

1 . A thermoacoustic device comprising: a tube in which a working fluid is sealed; first stacks which each have a plurality of communication paths along a heat transportation direction and which are each provided between a first high-temperature side heat exchanger and a first low-temperature side heat exchanger, which are provided in the tube; and a second stack which has a plurality of communication paths along a heat transportation direction and which is provided between a second high-temperature side heat exchanger and a second low-temperature side heat exchanger, which are provided in the tube, in which self-excited standing and traveling waves are generated by heating the first high-temperature side heat exchanger, and the second low-temperature side heat exchanger is cooled by the standing and traveling waves, or in which self-excited standing and traveling waves are generated by cooling the first low-temperature side heat exchanger, and the second high-temperature side heat exchanger is heated by the standing and traveling waves, wherein the first stacks each provided between the first high-temperature side heat exchanger and the first low-temperature side heat exchanger are provided at a plurality of positions in the tube. 
   
   
       2 . The thermoacoustic device according to  claim 1 , wherein the first stacks each provided between the first high-temperature side heat exchanger and the first low-temperature side heat exchanger are provided in the vicinities of positions at which the phase of change in acoustic particle velocity is the same as the phase of change in sound pressure. 
   
   
       3 . A thermoacoustic device comprising: a tube in which a working fluid is sealed; an acoustic wave generator generating an acoustic wave provided in the tube; and second stacks which each have a plurality of communication paths along a heat transportation direction and which are each provided between a second high-temperature side heat exchanger and a second low-temperature side heat exchanger, which are provided in the tube, in which standing and traveling waves are generated in the tube by the acoustic wave generator so that the second low-temperature side heat exchanger is cooled or the second high-temperature side heat exchanger is heated by the standing and traveling waves, and heat obtained by the cooling or the heating is output outside, wherein the second stacks each provided between the second high-temperature side heat exchanger and the second low-temperature side heat exchanger are provided at a plurality of positions in the tube. 
   
   
       4 . The thermoacoustic device according to  claim 3 , wherein the second stacks each provided between the second high-temperature side heat exchanger and the second low-temperature side heat exchanger are provided in the vicinities of positions at which the phase of change in acoustic particle velocity is the same as the phase of change in sound pressure. 
   
   
       5 . A thermoacoustic device comprising: a tube in which a working fluid is sealed; first stacks which each have a plurality of communication paths along a heat transportation direction and which are each provided between a first high-temperature side heat exchanger and a first low-temperature side heat exchanger, which are provided in the tube; and second stacks which each have a plurality of communication paths along a heat transportation direction and which are each provided between a second high-temperature side heat exchanger and a second low-temperature side heat exchanger, which are provided in the tube, in which self-excited standing and traveling waves are generated by heating the first high-temperature side heat exchanger, and the second low-temperature side heat exchanger is cooled by the standing and traveling waves, or in which self-excited standing and traveling waves are generated by cooling the first low-temperature side heat exchanger, and the second high-temperature side heat exchanger is heated by the standing and traveling waves, wherein the first stacks each provided between the first high-temperature side heat exchanger and the first low-temperature side heat exchanger have the same structure as the structure of the second stacks each provided between the second high-temperature side heat exchanger and the second low-temperature side heat exchanger, and the first stacks and the second stacks, which have the same structure, are provided at a plurality of positions in the tube.