WO2005093341A1 - 熱音響装置 - Google Patents
熱音響装置 Download PDFInfo
- Publication number
- WO2005093341A1 WO2005093341A1 PCT/JP2005/005221 JP2005005221W WO2005093341A1 WO 2005093341 A1 WO2005093341 A1 WO 2005093341A1 JP 2005005221 W JP2005005221 W JP 2005005221W WO 2005093341 A1 WO2005093341 A1 WO 2005093341A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- working fluid
- heat exchanger
- side heat
- temperature side
- sound
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
- F25B9/145—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle pulse-tube cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/10—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point with several cooling stages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1403—Pulse-tube cycles with heat input into acoustic driver
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1405—Pulse-tube cycles with travelling waves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1411—Pulse-tube cycles characterised by control details, e.g. tuning, phase shifting or general control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1416—Pulse-tube cycles characterised by regenerator stack details
Definitions
- the present invention relates to a thermoacoustic apparatus that can cool or heat an object using a thermoacoustic effect.
- Patent Document 1 With regard to a conventional technology of a heat exchange device using an acoustic effect, there are those described in Patent Document 1 and Non-Patent Document 1 below.
- the device described in Patent Document 1 relates to a device that performs cooling using the thermoacoustic effect, and a high-temperature side heat is placed inside a loop tube in which helium, argon, or a mixed gas thereof is sealed.
- the first stack sandwiched between the heat exchanger and the low-temperature heat exchanger and the regenerator sandwiched between the high-temperature heat exchange and the low-temperature heat exchange ⁇ are provided, and the high-temperature heat exchanger on the first stack side is provided.
- the low-temperature heat exchange on the regenerator side is cooled by the self-excited standing wave and traveling wave generated by heating the heat exchanger.
- Non-Patent Document 1 similarly discloses an experimental study of a cooling device using the thermoacoustic effect.
- the cooling device used in this experiment also consisted of a loop tube filled with helium, argon, or a mixture of these gases, and a heater (first and second heat exchangers between the high-temperature heat exchange and the low-temperature heat exchange ⁇ ). And a second stack provided at a position opposite to the first stack, and a heater provided on the first stack side (for heating the high-temperature side heat exchange).
- a temperature gradient is generated in the first stack by circulating tap water through the low-temperature heat exchange ⁇ , and self-excited sound waves are generated in the direction opposite to this temperature gradient, and the sound energy is looped.
- the heat is transferred to the regenerator through the pipe, and the heat energy is transferred in the opposite direction to the sound energy on the second stack side according to the law of conservation of energy. Neighborhood It is obtained so as to cool. According to this document, under a predetermined condition, a temperature drop of about 16 ° C at a portion where the thermometer is provided has been confirmed.
- Patent Document 1 JP-A-2000-88378
- Non-Patent Document 1 Shinichi Sakamoto, Kazuhiro Murakami, Yoshiaki Watanabe, ⁇ Experimental Study on Acoustic Cooling Phenomena Using Thermoacoustic Effect, '' IEICE Technical Report Technical Report, US2002-118 (2003 -02)
- thermoacoustic effect energy conversion efficiency is required as in a general heat exchange apparatus or the like.
- it is necessary to shorten the time required for generating a heating power standing wave and a traveling wave. It is necessary to improve the efficiency of energy conversion later.
- helium having a small Prandtl number, argon having a large Prandtl number, or a mixed gas thereof is sealed in the loop tube to reduce the time until the standing wave and the traveling wave are generated. The aim is to improve the conversion efficiency of sound energy and heat energy.
- the present invention has been made in view of the above problem, and has been made to provide a thermoacoustic device or the like that can shorten the time until generation of a sound wave and that can exchange heat well in a stack.
- the purpose is to provide.
- the present invention provides, inside a loop tube, a first stack sandwiched between a first high-temperature side heat exchanger and a first low-temperature side heat exchange ⁇ Heat exchange ⁇ and a second stack sandwiched between the second low temperature side heat exchange ⁇ , and the self-excited standing wave and traveling wave are generated by heating the first high temperature side heat exchange.
- the second low-temperature side heat exchanger is cooled by the standing wave and the traveling wave, or the self-excited standing wave and the traveling wave are generated by cooling Z and the first low-temperature side heat exchange.
- thermoacoustic device that heats the second high-temperature side heat exchanger with the standing wave and the traveling wave, wherein a first working fluid is sealed in a loop tube, and then the first working fluid is mixed with the first working fluid.
- a mixing means for injecting and mixing different working fluids is provided.
- the first working fluid is sealed, and, for example, immediately before the sound is generated, after the sound is generated, or after the sound is suddenly increased, the first working fluid is sealed. Since a working fluid different from the fluid is injected, the working fluid in the loop tube can be made uniform during use, and the gas can be optimally placed in consideration of the balance between sound generation and heat output. It becomes possible to mix.
- the working fluid is first injected into the loop pipe with the sonic velocity V and the working fluid is later injected into the loop fluid.
- a working fluid having a small specific gravity is sealed first, and a working fluid having a large specific gravity is injected later.
- a working fluid having a large Prandtle number and a working fluid having a small Prandtle number are injected into a working fluid having a small Prandtle number previously sealed in a loop pipe.
- a sound wave is quickly generated by using a working fluid having a small Prandtl number (ie, a working fluid having a small kinematic viscosity coefficient with respect to a thermal diffusion coefficient).
- the working fluid ie, the working fluid with a small thermal diffusivity relative to the kinematic viscosity coefficient
- the mixing means is used. Is provided above the center of the loop pipe.
- the working fluid when working fluids having relatively different weights are mixed, the working fluid can be uniformly mixed in the loop pipe by injecting the working fluid from above when the working fluid has a relatively different weight. I can do it.
- such a loop pipe is provided with a plurality of straight pipe sections that stand on the ground and a connecting pipe section that connects the plurality of straight pipe sections, and is configured to have a symmetrical shape.
- Mixing means should be provided at the center of the upper connecting pipe section for a suitable loop pipe.
- a sound detecting means for detecting the generation of a sound is provided, and when the sound detecting means detects a sound generated in the loop pipe or a state change of the sound, the injection of the working fluid is performed. To start.
- the working fluid is injected after the sound is generated or when the sound suddenly increases, so that the heat exchange is quickly performed after the sound is generated or after the loud noise is generated. It will be possible to achieve an efficient state.
- pressure measuring means for measuring the pressure in the loop pipe is provided, and when a constant pressure is measured by the pressure measuring means, the injection of the working fluid is stopped.
- the pressure in the loop pipe can be constantly maintained at a constant pressure value, and problems such as a change in heat conversion efficiency due to a difference in pressure occurring each time use is prevented. Will be able to
- the injection of the working fluid is stopped based on a temporal change of the heat output from the second high-temperature side heat exchanger or the second low-temperature side heat exchanger.
- the first stack sandwiched between the first high-temperature side heat exchanger and the first low-temperature side heat exchanger, the second high-temperature side heat exchanger, and the second low-temperature side A second stack sandwiched between heat exchangers, and generates a self-excited standing wave and a traveling wave by heating the first high-temperature side heat exchange. Cooling the second low-temperature side heat exchanger, or cooling the Z and the first low-temperature side heat exchanger to generate a self-excited standing wave and a traveling wave.
- thermoacoustic device 1 According to the present invention, a first embodiment of the thermoacoustic device 1 according to the present invention will be described with reference to the drawings.
- the thermoacoustic apparatus 1 includes a first high-temperature side heat exchanger 4 and a first low-temperature side inside a loop tube 2 formed in a substantially rectangular shape as a whole.
- a self-excited standing wave and a traveling wave are generated by heating the first high-temperature side heat exchange 4 on the first stack 3a side, and the standing wave and the traveling wave are propagated to the second stack 3b side.
- the second low-temperature side heat exchange 7 provided on the second stack 3b side is cooled.
- the time from the start of heating of the first high-temperature side heat exchanger 4 to the generation of the standing wave and the traveling wave is shortened, and the time generated by the generated standing wave and the traveling wave is reduced.
- the first working fluid with a low Prandtl number and a low specific gravity is sealed in the loop pipe 2 and then the standing wave and the traveling wave are filled. Generated force The speed of sound is slower than the first working fluid, the Prandtl number is larger, the specific gravity is larger, and the second working fluid is injected.
- this Prandtl number Pr is expressed as follows.
- thermoacoustic device 1 first, a working fluid with a high sound speed, such as helium, and a working fluid with a small specific gravity are sealed in the loop pipe 2 so that the standing wave and the traveling wave After a rapid generation of heat, a working fluid having a low sound speed, a large Prandtl number and a large specific gravity, such as argon, is appropriately injected to improve the efficiency of heat conversion.
- a working fluid with a high sound speed such as helium
- a working fluid with a small specific gravity are sealed in the loop pipe 2 so that the standing wave and the traveling wave
- a working fluid having a low sound speed, a large Prandtl number and a large specific gravity, such as argon is appropriately injected to improve the efficiency of heat conversion.
- the loop tube 2 constituting the thermoacoustic apparatus 1 includes a pair of opposed straight tube portions 2a provided vertically to the ground and a connecting tube portion 2b connecting the straight tube portions 2a. It is composed of metal pipes.
- the material of the loop tube 2a is not limited to metal, but may be made of transparent glass or resin. It is possible to confirm the positions of the first stack 3a and the second stack 3b and easily observe the state in the pipe. [0034]
- the lengths of the straight tube portion 2a and the connecting tube portion 2b provided as described above are as follows, assuming that the length of the straight tube portion 2a is La and the length of the connecting tube portion 2b is Lb.
- Is preferably set in the range.
- the wavefront of the sound wave generated from the first stack 3a can be stabilized as soon as possible.
- the first stack 3a sandwiched between the first high-temperature side heat exchanger 4 and the first low-temperature side heat exchange 5 and the second high-temperature side heat exchanger 4 are provided inside the loop tube 2 configured as described above.
- a second stack 3b sandwiched between the side heat exchange 6 and the second low temperature side heat exchange 7 is provided inside the loop tube 2 configured as described above.
- the first stack 3a is formed in a columnar shape so as to be in contact with the inner wall of the loop tube 2, and is made of a material having a large heat capacity such as ceramics, sintered metal, wire mesh, or metal nonwoven fabric.
- the pipe 2 is configured to have a porosity penetrating in the axial direction.
- this first stack 3a has a stack 3c having a large number of conducting paths 30 whose inner diameters gradually increase toward the outside with a central force, or a center force with an outward force.
- a stack 3d having a conducting path 30 with a smaller inner diameter may be used. Further, as shown in FIGS.
- a stack 3e having a conductive path 30 (a conductive path 30 indicated by a thick line) and a meandering path formed by laying a large number of minute spherical ceramics, etc.
- a stack 3f in which the flow path length of the conduction path 30 on the side close to the inner peripheral surface of the stack 3f may be used.
- the first high-temperature side heat exchanger 4 and the first low-temperature side heat exchanger 5 are both thin and made of metal, and provided with through holes for conducting standing waves and traveling waves inside. Is done. Among these heat exchanges, the first high-temperature heat exchange 4 is configured to be heated by electric power supplied from an external source, or by waste heat or unused energy.
- the first low-temperature side heat exchanger 5 is set so that water is circulated around the first low-temperature side heat exchanger 5 to be relatively lower in temperature than the first high-temperature side heat exchanger 4.
- the first stack 3a thus sandwiched between the first high-temperature side heat exchanger 4 and the first low-temperature side heat exchanger 5 has a state in which the first high-temperature side heat exchanger 4 is provided on the upper side.
- straight tube section 2 It is provided below the center of a.
- the first stack 3a is provided below the center of the straight tube portion 2a because sound waves are quickly generated by using an ascending airflow generated when the first high-temperature side heat exchanger 4 is heated. This is to prevent the warm working fluid generated when heating the first high-temperature side heat exchanger 4 from entering the first stack 3a. By preventing the warm working fluid from entering the first stack 3a in this way, a large temperature gradient can be formed in the first stack 3a.
- the center of the first stack 3a is set to 00 and the center of the first stack 3a is set at 0.28 ⁇ 0.05 in the circuit length counterclockwise from the starting point X, the self-excited sound waves can be generated more quickly and efficiently. Can occur.
- the second stack 3b is formed in a columnar shape so as to be in contact with the inner wall of the loop tube 2, and is made of ceramics, sintered metal, wire mesh, metal nonwoven fabric, or the like. It is made of a material having a large heat capacity and has many holes penetrating in the axial direction of the loop tube 2.
- This second stack 3b has a pressure fluctuation force of the working fluid along the loop pipe 2.
- the first peak exists in the vicinity of the first stack 3a, and the second peak is located at a position advanced about 1/2 of the entire circuit length. When there is a peak, the stack 3b is placed so that the center of the stack 3b is located at a position past the second peak.
- the structure of the second stack 3b is similar to that of the first stack 3a, as shown in FIGS. It is also possible to use a stack 3c or a stack 3d having a conduction path 30 whose inner diameter is gradually reduced toward the outside with a central force. Also, as shown in FIGS. 4 and 5, for example, a stack 3e having a conductive path 30 (a conductive path 30 indicated by a thick line) and a meandering path formed by laying a large number of minute spherical ceramics or the like, or the inside of the loop tube 2 is formed. Near the circumference V, a stack 3f in which the flow path length of the conduction path 30 on the side is shortened may be used.
- the second high-temperature side heat exchange 6 and the second low-temperature side heat exchanger 7 provided on the second stack 3b side are similarly made of thin metal, and have standing waves and It has a through-hole for conducting traveling waves. Then, water is circulated around the second high-temperature side heat exchange 6, and the second low-temperature side heat exchange 7 is connected to an object to be cooled.
- the object to be cooled may be outside air, home electric appliances that generate heat, the CPU of a personal computer, or the like, but other objects may be cooled.
- helium as a first working fluid having a small Prandtl number and a second working fluid having a larger Prandtle number than the first working fluid are provided.
- argon As argon.
- a helium gas injection device 9a filled with helium and an argon gas injection device 9b filled with argon are provided above the loop tube 2, and these gas injection devices 9a and 9b are installed. Connected to common inlet 9d.
- This inlet 9d is provided at the center of the upper connecting pipe section 2b, and is opened from the common inlet 9d by opening the valve 9c of the helium gas injector 9a and the valve 9c of the argon gas injector 9b. Allow the fluid to be injected into the loop tube 2.
- the valve 9c of the helium gas injection device 9a is opened, and helium is sealed in the loop tube 2.
- the valve 9c of the argon gas injection device 9b is opened, and argon having a low sound speed, a large Prandtl number, and a large specific gravity is injected from above the loop pipe 2. I will do it. Then, the argon having a relatively large specific gravity moves downward in the loop tube 2 and, at that time, is uniformly mixed with the helium having a small specific gravity. The sound energy, which also generates the force of the first stack 3a in the mixed state, is transferred in the direction of the transfer of the heat energy in the first stack 3a (the first high-temperature side heat exchanger) based on the law of conservation of energy.
- the second low-temperature heat exchanger 7 is transferred in the direction opposite to the first low-temperature heat exchanger 5), that is, from the first low-temperature heat exchange 5 to the first high-temperature heat exchange 4 and is transferred through the loop pipe 2. It is transferred to the second stack 3b side. Then, on the second stack 3b side, the working fluid expands and contracts due to the pressure change and volume change of the working fluid based on the standing wave and the traveling wave, and the heat energy generated at that time is transferred to the sound energy in the transfer direction. The heat is transferred from the second low-temperature heat exchange 7 in the opposite direction to the second high-temperature heat exchange 6. In this way, the second low-temperature side heat exchanger 7 is cooled, and the target object is cooled.
- a sound detecting means 8a for detecting generation of a sound as shown in FIG. 6 is provided in or on an outer peripheral portion of the loop pipe 2, and an output signal from the sound detecting means 8a receives an argon gas injection device 9b.
- pressure measuring means 90 such as a pressure gauge for measuring the pressure in the loop pipe 2 is provided.
- the pressure measuring means 90 measures a certain pressure value
- the valve 9c of the argon gas injector 9b is closed.
- This pressure is set, for example, in the range of 0. OlMPa-5MPa.
- a small pressure value is set to reduce the influence of viscosity.
- the heat change control means 91 may be provided.
- the heat change control means 91 when used, for example, when the temporal change of the heat output from the second low-temperature side heat exchange 7 falls below a certain value, the valve 9c of the argon gas injection device 9b is closed and injected. Control to stop the entry. With such a configuration, unnecessary injection of argon is prevented, and gas can be saved.
- the opening / closing control of the valve 9c When the opening / closing control of the valve 9c is performed on the basis of the temporal change of heat as described above, the opening / closing control of the knob 9c by the above-described pressure may be used together. With this configuration, it is possible to prevent the device 1 from being pressurized indefinitely and prevent the device 1 from being damaged.
- the loop pipe 2 is provided with a closeable opening 2c so that a new mixing can be performed by degassing each time the device 1 is used.
- the opening 2c is preferably provided at the lower end of the loop pipe 2.
- the opening 2c is opened to discharge the working fluid into the air with a relatively large specific gravity.
- a self-excited standing wave and a traveling wave are generated in a state in which one working fluid is sealed in the loop pipe 2, and thereafter, the working fluid differs from the working fluid. Since the gas injection device 9b for injecting the working fluid is provided, the most balanced state can be set in consideration of the efficiency of sound wave generation and energy conversion.
- helium having a small specific gravity and a small Prandtl number with a high sound speed is sealed first, and then argon having a large specific gravity and a large Prandtl number with a low sound speed is preliminarily enclosed. Since helium is injected, a sound wave can be quickly generated by such helium, and after the sound wave is generated, argon can be brought into a state most suitable for heat exchange efficiency.
- the loop pipe 2 a pipe having a plurality of straight pipe sections 2a provided vertically to the ground and a connecting pipe section 2b connecting the straight pipe sections 2a is used. Since the argon gas injector 9b is provided above the center of the loop pipe 2, the working fluid can be uniformly mixed by injecting argon, which is heavier than helium, upward.
- the loop tube 2 is formed in a symmetrical shape, and the inlet 9d of the gas injection device 9b is provided in the upper central portion of the loop tube 2, so that the gas injected from the inlet 9d is formed.
- the working fluid can be evenly injected into the loop pipe by separating the left and right sides, whereby unevenness of sound wave generation and unevenness of heat exchange can be eliminated.
- a sound detecting means 8a for detecting the generation of sound is provided, and when the sound generated in the loop pipe is detected by the sound detecting means 8a, a working fluid having a large Prandtle number is injected. As a result, it is possible to shorten the time required to generate sound waves and to improve the efficiency of heat exchange.
- the pressure measurement means 90 is provided to stop the injection of the working fluid when the pressure in the loop pipe 2 reaches a constant value, so that the pressure in the loop pipe is always kept constant. It can be maintained, and problems can be prevented when the efficiency of heat conversion changes due to different pressures each time it is used.
- the injection of the working fluid is stopped based on the temporal change of the heat output from the second high-temperature side heat exchanger 6. Therefore, if the working fluid is continuously injected in vain, it is possible to prevent trash.
- an opening 2 c for extracting argon is provided at the lower end of the loop tube 2.
- thermoacoustic apparatus 1 for example, in the thermoacoustic apparatus 1 as described above, self-excited sound waves are generated by the temperature gradient provided in the first stack 3a.
- a sound wave generator 8b may be provided on the outer peripheral portion or inside the loop tube 2.
- the sound wave generator 8b is composed of a speaker, a piezoelectric element, and other devices that forcibly vibrate the working fluid from the outside.
- the intervals between the 1Z2 wavelength and 1Z4 wavelength of the generated standing wave and traveling wave are set.
- thermoacoustic system 100 in which a plurality of thermoacoustic devices 1 are connected is used as shown in FIG. You may make it.
- la and lb '"In indicate the thermoacoustic apparatus 1 configured as described above.
- These first thermoacoustic apparatus la, second thermoacoustic apparatus lb ... nth thermoacoustic apparatus In is provided adjacently in series, and the gas injection devices 9a and 9b are provided in common for all or a plurality of thermoacoustic devices la, lb... Ln.
- the high-temperature side heat exchange 4 is all heated by a heater or the like, while the second low-temperature side heat exchange 7 of the thermoacoustic device la... in each of them is the first low-temperature side heat exchange of the adjacent thermoacoustic device lb.... 5, whereby the temperature gradient in the second thermoacoustic device 1 can be made larger than the temperature gradient in the first stack 3a in the first thermoacoustic device la, and The temperature gradient of the thermoacoustic device In can be increased toward the downstream side, and the thermoacoustic device at the end can be increased.
- thermoacoustic devices la... When the thermoacoustic devices la... are connected in this way, if each of the thermoacoustic devices la... tries to excite the sound wave by itself, the heat at the end will be reduced. Until the standing wave and traveling wave are generated by the acoustic device In It will take a very long time. For this reason, in particular, a sound wave generator 8b is provided on the outer peripheral surface or inside of the loop tube 2 so as to shorten the time until the standing wave and the traveling wave are generated in each thermoacoustic device la. Good. Also, in such a system 100, when sound waves are generated in each loop tube 2, the valve 9c of the gas injection device 9b provided in common is controlled, and each time a sound wave is generated in each loop tube 2, the loop is generated. It is good to open the knob 9c corresponding to the pipe 2 and inject the working fluid. Also, when the injection is stopped, similarly, the pressure measurement means 90 and the heat change control means provided in each loop pipe 2 are provided. It is good to stop the
- thermoacoustic apparatus 1 that heats the first stack 3a side and cools the second stack 3b side has been described as an example.
- the first stack 3a may be cooled and the second stack 3b may be heated.
- FIG. 8 shows an example of the thermoacoustic apparatus 1.
- components having the same reference numerals as those in FIGS. 1 to 6 indicate components having the same structure as that described above.
- the first stack 3a is provided above the center of the straight tube portion 2a, and the second stack 3b is provided at an appropriate position of the straight tube portion 2a opposed thereto. It is preferable that the first stack 3a and the second stack 3b are installed at positions where the same conditions as the installation conditions in the above embodiment are satisfied. Then, while inputting cold heat of minus several tens of degrees or less to the first low-temperature heat exchanger 5, an antifreeze liquid is supplied to the first high-temperature heat exchanger 4 and the second low-temperature heat exchanger 7. Circulate.
- thermoacoustic effect a self-excited sound wave is generated by the temperature gradient formed in the first stack 3a, and the wavefront is stabilized by the relatively long straight tube portion 2a.
- a standing wave and a traveling wave The traveling direction of the sound energy of the standing wave and the traveling wave is opposite to the transfer direction of the heat energy in the first stack 3a (the direction of the first high-temperature heat exchange 4 force and the first low-temperature heat exchange 5). Occurs in the direction of the head.
- the sound energy due to the standing wave and the traveling wave is propagated to the second stack 3b side, and the second stack 3b side receives the working fluid due to a pressure change and a volume change of the working fluid based on the standing wave and the traveling wave. Repeatedly expands and contracts, and transfers the generated heat energy to the second low-temperature side heat exchange, which is in the opposite direction to the sound energy transfer direction. From the heat exchanger 7 to the second high-temperature heat exchanger 6 side. Thus, the second high-temperature side heat exchanger 6 is heated.
- a sound wave generator 8b may be provided on the outer peripheral surface or inside the loop tube 2 in order to promote the generation of standing waves and traveling waves.
- thermoacoustic devices 1 may be connected as shown in FIG. 7 to output higher V ⁇ heat from the thermoacoustic device 1 on the terminal side.
- FIG. 1 is a schematic diagram of a thermoacoustic apparatus showing one embodiment of the present invention.
- FIG. 2 is a diagram showing a shape of a stack according to another embodiment.
- FIG. 3 is a diagram showing a shape of a stack according to another embodiment.
- FIG. 4 is a diagram showing a shape of a stack according to another embodiment.
- FIG. 5 is a diagram showing a shape of a stack according to another embodiment.
- FIG. 6 is a schematic diagram of a thermoacoustic apparatus provided with a sound detection unit, a pressure measurement unit, and a heat change control unit.
- FIG. 7 is a schematic diagram of an acoustic heating system in which an acoustic heating unit is connected.
- FIG. 8 is a schematic diagram of a thermoacoustic apparatus according to another embodiment.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/594,275 US7603866B2 (en) | 2004-03-26 | 2005-03-23 | Thermoacoustic apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-091686 | 2004-03-26 | ||
JP2004091686A JP4364032B2 (ja) | 2004-03-26 | 2004-03-26 | 熱音響装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005093341A1 true WO2005093341A1 (ja) | 2005-10-06 |
Family
ID=35056281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/005221 WO2005093341A1 (ja) | 2004-03-26 | 2005-03-23 | 熱音響装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7603866B2 (ja) |
JP (1) | JP4364032B2 (ja) |
WO (1) | WO2005093341A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007263541A (ja) * | 2006-03-30 | 2007-10-11 | Nissan Motor Co Ltd | 高温発生装置 |
CN102331109A (zh) * | 2011-10-08 | 2012-01-25 | 中科力函(深圳)热声技术有限公司 | 低温热声制冷机 |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008101910A (ja) * | 2008-01-16 | 2008-05-01 | Doshisha | 熱音響装置 |
JP5548513B2 (ja) * | 2010-04-23 | 2014-07-16 | 本田技研工業株式会社 | 熱音響機関 |
US8584471B2 (en) * | 2010-04-30 | 2013-11-19 | Palo Alto Research | Thermoacoustic apparatus with series-connected stages |
WO2013084830A1 (ja) * | 2011-12-05 | 2013-06-13 | 学校法人 東海大学 | 熱音響機関 |
JP6284794B2 (ja) * | 2014-03-19 | 2018-02-28 | 住友重機械工業株式会社 | 蓄冷器 |
JP6313106B2 (ja) * | 2014-04-22 | 2018-04-18 | 京セラ株式会社 | ハイブリッドシステム |
JP2017015313A (ja) * | 2015-06-30 | 2017-01-19 | 新潟県 | 熱音響冷却装置 |
JP6717460B2 (ja) * | 2016-08-09 | 2020-07-01 | 株式会社ジェイテクト | 熱音響冷却装置 |
SE543318C2 (en) * | 2018-06-21 | 2020-11-24 | Mats Olsson | Method and system for cooling hot objects |
WO2020045600A1 (ja) * | 2018-08-31 | 2020-03-05 | 京セラ株式会社 | 熱音響装置 |
US20210204072A1 (en) * | 2018-08-31 | 2021-07-01 | Kyocera Corporation | Thermoacoustic device |
US10605488B1 (en) * | 2019-04-01 | 2020-03-31 | John Howard Luck | Heat transfer device for solar heating |
JP7288486B2 (ja) * | 2021-09-17 | 2023-06-07 | 株式会社Kokusai Electric | 基板処理方法、基板処理装置、半導体装置の製造方法、及びプログラム |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000088378A (ja) * | 1998-07-17 | 2000-03-31 | Idotai Tsushin Sentan Gijutsu Kenkyusho:Kk | ループ管気柱音響波動冷凍機 |
JP2002031423A (ja) * | 2000-07-17 | 2002-01-31 | Iwatani Internatl Corp | 熱音響エンジン |
JP2002535597A (ja) * | 1999-01-20 | 2002-10-22 | ザ リージェンツ オブ ザ ユニバーシティ オブ カリフォルニア | 質量流束を抑制した進行波装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5647216A (en) * | 1995-07-31 | 1997-07-15 | The United States Of America As Represented By The Secretary Of The Navy | High-power thermoacoustic refrigerator |
US5953921A (en) * | 1997-01-17 | 1999-09-21 | The United States Of America As Represented By The Secretary Of The Navy | Torsionally resonant toroidal thermoacoustic refrigerator |
US6164073A (en) * | 1998-05-18 | 2000-12-26 | The Regents Of The University Of California | Method and apparatus for adapting steady flow with cyclic thermodynamics |
CN100366991C (zh) * | 2003-03-26 | 2008-02-06 | 学校法人同志社 | 冷却装置 |
JP2005180294A (ja) | 2003-12-18 | 2005-07-07 | Toyota Motor Corp | 熱音響エンジン |
-
2004
- 2004-03-26 JP JP2004091686A patent/JP4364032B2/ja not_active Expired - Fee Related
-
2005
- 2005-03-23 WO PCT/JP2005/005221 patent/WO2005093341A1/ja active Application Filing
- 2005-03-23 US US10/594,275 patent/US7603866B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000088378A (ja) * | 1998-07-17 | 2000-03-31 | Idotai Tsushin Sentan Gijutsu Kenkyusho:Kk | ループ管気柱音響波動冷凍機 |
JP2002535597A (ja) * | 1999-01-20 | 2002-10-22 | ザ リージェンツ オブ ザ ユニバーシティ オブ カリフォルニア | 質量流束を抑制した進行波装置 |
JP2002031423A (ja) * | 2000-07-17 | 2002-01-31 | Iwatani Internatl Corp | 熱音響エンジン |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007263541A (ja) * | 2006-03-30 | 2007-10-11 | Nissan Motor Co Ltd | 高温発生装置 |
CN102331109A (zh) * | 2011-10-08 | 2012-01-25 | 中科力函(深圳)热声技术有限公司 | 低温热声制冷机 |
Also Published As
Publication number | Publication date |
---|---|
US7603866B2 (en) | 2009-10-20 |
JP4364032B2 (ja) | 2009-11-11 |
US20070220903A1 (en) | 2007-09-27 |
JP2005274101A (ja) | 2005-10-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2005093341A1 (ja) | 熱音響装置 | |
WO2005093340A1 (ja) | 熱音響装置及び熱音響システム | |
Swift | Analysis and performance of a large thermoacoustic engine | |
Deng et al. | Experimental study on thermal performance of an anti-gravity pulsating heat pipe and its application on heat recovery utilization | |
US7804046B2 (en) | Acoustic heater and acoustic heating system | |
WO2006073007A1 (ja) | 熱音響装置 | |
JP2008101910A (ja) | 熱音響装置 | |
JP2006189217A (ja) | 熱交換器、及び、その熱交換器を用いた熱音響装置 | |
Hariharan et al. | Experimental investigation of a thermoacoustic refrigerator driven by a standing wave twin thermoacoustic prime mover | |
Skaria et al. | Simulation studies on the performance of thermoacoustic prime movers and refrigerator | |
Ramesh Nayak et al. | Influence of stack geometry on the performance of thermoacoustic refrigerator | |
Swift et al. | Quarter-wave pulse tube | |
Hamood et al. | Synthetic jet flow driven by a standing-wave thermoacoustic heat engine | |
Jung et al. | Study of a small-scale standing-wave thermoacoustic engine | |
Abduljalil et al. | Design and experimental validation of looped-tube thermoacoustic engine | |
JP6158926B2 (ja) | 熱・音波変換部品及び熱・音波変換器 | |
Tillery et al. | Boiling heat transfer enhancement using a submerged, vibration-induced jet | |
Gonzalez et al. | Experimental study of a pulsating heat pipe using nanofluid as a working fluid | |
Kamble et al. | Experimental and simulation studies on the performance of standing wave thermoacoustic prime mover for pulse tube refrigerator | |
Martinez | Experimental study of a low-frequency thermoacoustic device | |
Backhaus et al. | High-temperature self-circulating thermoacoustic heat exchanger | |
JP5279027B2 (ja) | 熱音響冷風器 | |
JP2007147193A (ja) | 熱音響冷凍機 | |
Petculescu | Fundamental measurements in standing-wave and traveling-wave thermoacoustics | |
JP4522191B2 (ja) | 熱音響装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 10594275 Country of ref document: US Ref document number: 2007220903 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase | ||
WWP | Wipo information: published in national office |
Ref document number: 10594275 Country of ref document: US |