Energy conversion device

An energy conversion device comprising:

• a pipe member including a working gas and a transmission path for an acoustic wave of the working gas;
• a first acoustic wave generator disposed in the pipe member, the first acoustic wave generator including a thermal energy generator configured to generate a first thermal energy from electric energy supplied from an electric power source, the first acoustic wave generator converting the first thermal energy generated by the thermal energy generator to an acoustic energy to generate the acoustic wave of the working gas by a self-excited thermo acoustic vibration;
• a second acoustic wave generator disposed in the pipe member, the second acoustic wave generator converting a second thermal energy supplied from a heat supply source to an acoustic energy to generate the acoustic wave of the working gas by a self-excited thermo acoustic vibration;
• and
• an output unit disposed in the pipe member, the output unit converting an acoustic energy of the acoustic waves from the first acoustic wave generator and the second acoustic wave generator to other energy other than the acoustic energy and outputting the other energy;
• and a power conversion device that converts power input and output relative to the electric power source;
• and
• a cooling medium circuit in which a liquid phase cooling medium circulates for cooling the power conversion device, the cooling medium circuit capable of discarding heat exhausted from the power conversion device to an outside of the cooling medium circuit, wherein
• the first acoustic wave generator and the second acoustic wave generator are configured to emit waste heat, which is not converted into the acoustic energy while emitted from the working gas, to the cooling medium circulating through the cooling medium circuit.