Machine tool

A machine tool comprising:

• a tool to be supplied with a first fluid to cool the tool;
• a thermoacoustic apparatus comprising
• a loop tube that is filled with a working gas;
• a first stack provided in the loop tube and sandwiched between a first high-temperature heat exchanger and a first low-temperature heat exchanger, the first stack having a plurality of conducting channels in a heat transfer direction;
• and
• a second stack provided in the loop tube and sandwiched between a second high-temperature heat exchanger and a second low-temperature heat exchanger, the second stack having a plurality of conducting channels in the heat transfer direction;
• wherein the thermoacoustic apparatus heats the first high-temperature heat exchanger to generate a temperature gradient between opposite ends of the first stack and causes spontaneous excitation, and thereby generates a standing wave and a traveling wave that allows the second low-temperature heat exchanger to be cooled;
• and
• the first low-temperature heat exchanger is cooled using a first fluid to be supplied to the tool,
• the first high-temperature heat exchanger is heated using a second fluid with a temperature of the second fluid elevated by absorbing exhaust heat from the constituent apparatus of the tool when the second fluid cools the constituent apparatus,
• the second low-temperature heat exchanger is cooled by a thermoacoustic effect produced by the temperature gradient generated between the first low-temperature heat exchanger and the first high-temperature heat exchanger, and
• a third fluid is cooled by the second low-temperature heat exchanger.