CN-224228798-U - Thermo-acoustic power generation system

Abstract

The utility model provides a thermoacoustic power generation system, which can reliably form a temperature gradient in a heat accumulator to improve the stability of thermoacoustic power generation. The thermoacoustic power generation system includes a linear generator having a piston that vibrates in a cylinder to convert acoustic energy into electric energy, an annular pipe connected to the linear generator through a resonance pipe, and a prime mover disposed in the annular pipe and including a cooler, a heat accumulator, and a heater disposed in this order, the cooler being a low-temperature side heat exchanger, the heater being a high-temperature side heat exchanger, the heat accumulator forming a temperature gradient to generate thermoacoustic self-excited vibration, the low-temperature side heat exchanger being heat-exchanged with first cooling water from the engine through a first cooling water circuit, the low-temperature side heat exchanger being heat-exchanged with second cooling water through a second cooling water circuit, the second cooling water circuit being independent of the first cooling water circuit, the thermoacoustic power generation system further including a passage switching valve through which the second cooling water is supplied to the low-temperature side heat exchanger.

Inventors

• KURIYAMA YASUKAZU

Assignees

• 本田技研工业株式会社

Dates

Publication Date

20260512

Application Date

20250704

Claims (3)

1. 1. A thermoacoustic power generation system, comprising: a linear generator having a piston that vibrates back and forth within a cylinder to convert acoustic energy into electrical energy; a ring pipe connected to the linear generator through a resonance pipe, and The prime motor is arranged in the annular pipe and comprises a cooler, a heat accumulator and a heater which are sequentially arranged, wherein the cooler is used as a low-temperature side heat exchanger, the heater is used as a high-temperature side heat exchanger, temperature gradients are formed at two ends of the heat accumulator to generate thermoacoustic self-excitation vibration, The low-temperature side heat exchanger exchanges heat with first cooling water from the engine through a first cooling water circuit, The low temperature side heat exchanger may exchange heat with second cooling water through a second cooling water circuit, which is independent from the first cooling water circuit, The thermoacoustic power generation system further includes a channel switching valve through which the second cooling water is supplied to the low-temperature side heat exchanger.
2. 2. The thermoacoustic power generation system according to claim 1, wherein, Also comprises a radiator, an electric water pump and a temperature sensor, The radiator, the electric water pump, the temperature sensor and the channel switching valve are arranged in series in the second cooling water loop.
3. 3. The thermoacoustic power generation system according to claim 1, wherein, When the temperature of the first cooling water is higher than a predetermined value, the second cooling water is supplied to the low temperature side heat exchanger.

Description

Thermo-acoustic power generation system Technical Field The present utility model relates to a power generation system, and more particularly, to a thermo-acoustic power generation system. Background In recent years, research and development have been conducted to provide energy efficiency in order to ensure reliable, sustainable and advanced energy access affordable to more people. In the prior art, a thermo-acoustic generator is proposed, which is capable of converting thermal energy from a prime mover into mechanical energy in the form of sound waves, driving a piston of a linear generator to reciprocate along its own central axis, thereby causing the linear generator to convert the mechanical energy into electrical energy for output. If the thermoacoustic power generation system of the prior art is applied to a vehicle, the high temperature heat exchanger of the prime mover uses the heat of the exhaust gas of the internal combustion engine of the vehicle as a heat source, the unstable output of the internal combustion engine may cause unstable temperature of the high temperature heat exchanger, and it is difficult to keep the thermoacoustic power generator constantly running. Accordingly, there is a need for improvements in thermoacoustic power generation systems to overcome the above-described problems. Disclosure of utility model The utility model provides a thermoacoustic power generation system, which can reliably form a temperature gradient in a heat accumulator to improve the stability of thermoacoustic power generation. According to an embodiment of the present utility model, a thermoacoustic power generation system includes a linear generator having a piston that vibrates back and forth in a cylinder to convert acoustic energy into electric energy, an annular pipe connected to the linear generator through a resonance pipe, and a prime mover disposed in the annular pipe and including a cooler, a regenerator, and a heater disposed in this order, the cooler serving as a low-temperature side heat exchanger, the heater serving as a high-temperature side heat exchanger, both ends of the regenerator forming a temperature gradient to generate thermoacoustic self-excited vibration, the low-temperature side heat exchanger exchanging heat with first cooling water from an engine through a first cooling water circuit, the low-temperature side heat exchanger exchanging heat with second cooling water through a second cooling water circuit, the second cooling water circuit being independent of the first cooling water circuit, the thermoacoustic power generation system further including a channel switching valve through which the second cooling water is supplied to the low-temperature side heat exchanger. In an embodiment according to the present utility model, the thermo-acoustic power generation system further includes a radiator, an electric water pump, and a temperature sensor, the radiator, the electric water pump, the temperature sensor, and the channel switching valve being disposed in series in the second cooling water circuit. In an embodiment according to the present utility model, the second cooling water is supplied to the low temperature side heat exchanger when the temperature of the first cooling water is higher than a predetermined value. In view of the above, in the thermo-acoustic power generation system of the present utility model, the low-temperature side heat exchanger of the prime mover may exchange heat with the second cooling water separately provided in addition to the first cooling water from the engine. Accordingly, when the temperature of the first cooling water from the engine exceeds a predetermined temperature due to the engine being in a high-load operation state, the low-temperature side heat exchanger of the prime mover can be maintained at a sufficiently low temperature by the second cooling water, ensuring that the heat accumulator of the prime mover maintains a desired temperature gradient to generate thermoacoustic self-excited vibration. Thus, the thermoacoustic power generation system of the present utility model can reliably form a temperature gradient in the heat accumulator to improve the stability of thermoacoustic power generation. In order to make the above features and advantages of the present utility model more comprehensible, embodiments accompanied with figures are described in detail below. Drawings FIG. 1 is a schematic diagram of a thermoacoustic power generation system according to an embodiment of the present utility model; FIG. 2 is a schematic illustration of the thermoacoustic power generation system of FIG. 1 applied to a vehicle; FIG. 3 shows the flow rate of the cooling water of FIG. 2 as a function of the temperature of the cooling water; fig. 4 is a schematic diagram of a portion of the components of the vehicle and thermoacoustic power generation system of fig. 3. Reference numerals illustrate: 10 Linear generator 11 Piston 12 Cylinder body 13 Pre