WO2005093339A1 - 音響暖房装置、及び、音響暖房システム - Google Patents
音響暖房装置、及び、音響暖房システム Download PDFInfo
- Publication number
- WO2005093339A1 WO2005093339A1 PCT/JP2005/005219 JP2005005219W WO2005093339A1 WO 2005093339 A1 WO2005093339 A1 WO 2005093339A1 JP 2005005219 W JP2005005219 W JP 2005005219W WO 2005093339 A1 WO2005093339 A1 WO 2005093339A1
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- Prior art keywords
- stack
- temperature
- heating device
- acoustic heating
- acoustic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
Definitions
- the present invention relates to a heat exchange device using a thermoacoustic effect and a system therefor.
- 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 cooling device utilizing the thermoacoustic effect, and includes a high-temperature side heat exchanger and a low-temperature side heat exchanger inside a gas-filled loop tube.
- a sandwiched stack and a regenerator formed by a stack sandwiched between a high-temperature side heat exchanger and a low-temperature side heat exchanger are provided.
- a temperature gradient is generated in the stack by heating the high-temperature heat exchange on the stack side, and heat energy is transferred from the high-temperature heat exchanger to the low-temperature heat exchanger in the stack.
- a self-excited sound wave is generated so as to transfer the sound energy in the direction opposite to the transfer direction of the heat energy, and the sound energy by the sound wave is transmitted to the regenerator. Then, heat energy is transferred in the direction opposite to the propagation direction of the sound energy on the regenerator side to cool the low-temperature side heat exchange.
- Non-Patent Document 1 similarly discloses a cooling device using the thermoacoustic effect, and discloses an experimental study using the cooling device.
- the cooling device used in this experiment also includes a first stack sandwiched between a heater (high-temperature side heat exchanger) and a low-temperature side heat exchanger in a metal loop tube, and the opposing surface of the loop tube. And a second stack having a low-temperature side heat exchange. Then, while heating the heater (high-temperature side heat exchanger) provided on the first stack side, and circulating tap water through the low-temperature side heat exchanger, a large temperature gradient is generated in the first stack, A self-excited sound wave is generated in the direction opposite to this temperature gradient.
- thermometer provided on the other end of the second stack. According to this document, under a predetermined condition, a temperature drop of about 16 ° C. is confirmed in a portion where a thermometer is provided.
- thermoacoustic cools indoor space or generates heat such as home appliances, notebook computers, communication devices, game machines, automobiles, and office equipment. It is desired to be used as a device for cooling accompanying equipment.
- 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)
- cooling While cooling, such a cooling device cools the indoor space and a target object, and in a very cold environment, for example, the outside air temperature becomes 20 ° C to 60 ° C. In cold climates, it is desirable to warm indoor spaces rather than cool indoor spaces.
- all of the heat exchange devices utilizing acoustic effects which have been proposed in the past, are not suitable for use in cold regions and the like because they all cool indoor spaces and target objects.
- an object of the present invention is to provide an apparatus and a system thereof that can warm an object while utilizing the thermoacoustic effect that solves the above-mentioned problems.
- the present invention provides a first stack sandwiched between a high-temperature-side heat exchanger and a low-temperature input-side heat exchanger in a first pipe section, and a low-temperature stack in a second pipe section.
- a second stack sandwiched between the side heat exchanger and the high-temperature output side heat exchange ⁇ , and the standing wave and traveling wave generated in the loop tube are subjected to a first stacking force. Then, a temperature gradient is generated in the second stack by transmitting the heat to the second stack, and heat is output from the high-temperature output heat exchange provided in the second stack.
- the indoor air is cooled by using cold external heat (hereinafter, referred to as "cold heat"). It is possible to warm a space or a target object, and to obtain a useful heat exchange device in a cold region or the like.
- a device can be used as a thermostat for overcooling.
- thermoacoustic effect it is relatively simple without using a medium, such as chlorofluorocarbon, which poses a problem in environmental measures, or a power source such as a compressor. Heating can be performed with a simple configuration.
- loop pipe a first pipe section and a second pipe section provided upright with respect to the ground, and a connecting pipe connecting the first pipe section and the second pipe section.
- a part having a part is used.
- the position of the first stack provided in the first tube portion is provided higher than the position of the second stack provided in the second tube portion.
- the first stack Set so that the center of is the position of 0.28 ⁇ 0.05 of the total circuit length.
- the pressure fluctuation of the sealed working fluid along the circuit has a first peak near the first stack, and a position further advanced by about 1Z2 of the total circuit length.
- the second stack is provided such that the center of the second stack is located at a position past the second peak.
- the first pipe section and the second pipe section are set to be longer than the connecting pipe section.
- the shape of the corner at the boundary between the first pipe section and the second pipe section and the connecting pipe section is a shape that totally reflects the standing wave and the traveling wave between the connecting pipe section and the connecting pipe section.
- a sound wave generator for generating a standing wave and a traveling wave is provided on an outer peripheral portion or inside the loop tube.
- first stack or Z and a second stack those having meandering conductive paths are used.
- the material of the first stack and / or the second stack is at least one kind of ceramic, sinter metal, wire mesh, and metal non-woven fabric.
- the fluid is configured so that its angular frequency ( ⁇ : temperature relaxation time) is in the range of 0.2-20.
- a plurality of such acoustic heating devices are provided, and the high-temperature output-side heat exchanger of one acoustic heating device is connected to the high-temperature heat exchanger of the adjacent acoustic heating device.
- the temperature gradient in the first stack increases sequentially for each adjacent acoustic heating device, and higher heat can be output from the acoustic heating device on the terminal side.
- the first stack sandwiched between the high-temperature side heat exchanger and the low-temperature input side heat exchanger in the first tube section, and the low-temperature side heat exchange ⁇ A second stack sandwiched between the output side heat exchange and the second stack by propagating the standing wave and the traveling wave generated in the loop tube to the first stack force.
- a temperature gradient is generated in the stack, and the high-temperature output heat exchange heat provided on the second stack side is output, so the indoor space and the target object can be Can be warmed.
- a useful heat exchange device can be obtained in a cold region or the like.
- thermoacoustic effect is used, heating can be performed with a relatively simple structure without using a power source such as a compressor or a medium that poses a problem in environmental measures such as Freon. Become like
- the acoustic heating device 1 is formed in a substantially rectangular shape as a whole. Inside the loop pipe 2, the first stack 3a sandwiched between the high-temperature heat exchanger 4 and the low-temperature input heat exchanger 5, and sandwiched between the low-temperature heat exchanger 6 and the high-temperature output heat exchanger 7. And a self-excited standing wave and a traveling wave by cooling the low-temperature input-side heat exchange 5 on the first stack 3a side. By transmitting the traveling wave to the second stack 3b side, high heat can be output from the high-temperature output-side heat exchange 7 provided on the second stack 3b side.
- the loop pipe 2 includes a first pipe section 2a and a second pipe section 2b provided in an upright (preferably vertical) state with a ground force, and the first pipe section 2a and the second pipe section 2b. And a connecting pipe 2d for connecting these via corners 2c at both ends of the connecting pipe.
- the first pipe section 2a, the second pipe section 2b, the corner section 2c, and the connecting pipe section 2d are made of metal pipes, but are not limited to such as transparent glass or resin. Can also be configured. When it is made of a transparent glass resin or the like, the position of the first stack 3a or the second stack 3b in an experiment or the like can be confirmed and the state in the tube can be easily observed.
- the length La of the first pipe 2a and the second pipe 2b is set longer than the length Lb of the connecting pipe 2d.
- the shape of the corners 2c provided at both ends of the first tube portion 2a and the second tube portion 2b is such that the sound wave propagating in the tubes can be completely reflected to the connecting tube portion 2d and the like. For example, it is configured in an arc shape or the like.
- FIG. 2 shows a specific configuration of the corner 2c.
- the corner portion 2c has an inner diameter substantially equal to the inner diameter of the first tube portion 2a, and has a diameter substantially equal to the inner diameter of the loop around the inner corner portion of the loop tube 2. It is configured. As a result, all the sound energy transmitted from the first tube portion 2a is reflected at the corner portion 2c, and is transferred to the connecting tube portion 2d side without returning to the first tube portion 2a.
- the shape of the corner 2c is not limited to an arc shape, but may be a linear shape as shown in FIG.
- FIG. 3 is an enlarged view of a straight corner 20c provided between the first pipe 2a and the connecting pipe 2d.
- the outer corner portion of the corner portion 20c is set to a linear shape of 45 degrees which is an intermediate angle of 90 degrees which is a connection angle between the first pipe portion 2a and the connection pipe portion 2d. Then, all the sound waves propagating in the first tube portion 2a are reflected to the connecting tube portion 2d side by the straight corner portion.
- An inert gas such as helium, argon, a mixed gas of helium and argon is sealed inside the loop tube 2, and helium having a relatively small Prandtl number is used to prevent loss due to viscosity.
- helium having a relatively small Prandtl number is used to prevent loss due to viscosity.
- the working fluid is not limited to such an inert gas, but may be a gas such as nitrogen or air.
- the pressure of these working fluids is set to 0. OlMPa-5. OMPa. To reduce the effect of viscosity, set to a relatively small pressure.
- the first stack 3a and the second stack 3b provided in the loop tube 2 are formed in a columnar shape so as to be in contact with the inner wall of the loop tube 2, and are made of ceramitas, sintered metal, wire mesh, metal It is made of a material having a large heat capacity, such as a nonwoven fabric, and has a porosity penetrating in the axial direction of the loop tube.
- these stacks 3a and 3b are provided with a large number of thin linear conductive paths.
- a small number of spherical ceramics are spread and meandered. It is also possible to use a stack 3c provided with conducting paths 30 (conducting paths indicated by thick lines).
- the meandering conduction path 30 By providing the meandering conduction path 30 in this way, it is possible to secure a large contact area between the working fluid and the stack 3c, and to increase the heat exchange, so that high heat from the high-temperature output-side heat exchange 7 can be increased. You can output it.
- the first stack 3a side is a stack having a thin, straight conductive path that promotes the generation of self-excited sound waves
- the second stack 3b As for the stack 3c, a stack 3c having a meandering passage 30 that allows higher heat output may be used.
- a laminate of a large number of mesh stainless steels may be used.
- the mounting position of the first stack 3a is set above the first pipe portion 2a, and is fixed at that position while being sandwiched between the high-temperature heat exchange 4 and the low-temperature input heat exchange 5.
- This low-temperature side heat input device is formed by forming a conduction path for vertically conducting a working fluid inside a thin metal plate, and is provided in contact with a lower portion of the first stack 3a. Then, it is cooled to a temperature of, for example, ⁇ 20 ° C. to 60 ° C. or lower by strong cold heat such as outdoors in a cold region.
- the high-temperature side heat exchange 4 is similarly formed by forming a conduction path for vertically conducting the working fluid inside the thin metal plate, and is provided in contact with the upper part of the first stack 3a.
- the temperature is set to + 20 ° C-+ 30 ° C or higher.
- a temperature gradient is generated in the first stack 3a by the temperature difference between the high-temperature side heat exchanger 4 and the low-temperature input side heat exchanger 5 as described above, thereby generating a self-excited sound wave.
- the first stack 3a has a force that can be provided below the first pipe portion 2a. If the first stack 3a is provided at such a position, a space for escaping cool air from the low-temperature input side heat exchanger 5 is provided. Then, cold air enters the first stack 3a. For this reason, a large temperature gradient cannot be generated in the first stack 3a, and there is a possibility that self-excited sound waves will not be generated. For this reason, in the present embodiment, in order to secure a place where cold air escapes and to easily generate a self-excited sound wave, it is preferable that the upper part of the first pipe part 2a, preferably the center of the first pipe part 2a, Also, the first stack 3a is provided on the upper side.
- the mounting position of the second stack 3b depends on the pressure change of the working fluid along the loop pipe 2. Power When the first peak exists near the first stack 3a and the second peak exists at a position further advanced by about half the circuit length, the center of the stack 3b is moved to the second peak. It is provided so that it may be located in a place past the hoop.
- the low-temperature side heat exchanger 6 provided below the second stack 3b is formed by forming a conduction path for vertically conducting a working fluid inside a thin metal plate, Similar to the high-temperature output heat exchange 7 provided in the stack 3a, the temperature is set to + 20 ° C- + 30 ° C or higher by circulating an antifreeze liquid around the surroundings.
- the high-temperature output-side heat exchanger 7 similarly has a conduction path for vertically conducting the working fluid inside the thin metal plate, and heats the object to be heated. Is output.
- the object to be heated is, for example, air in an indoor space, or a vehicle engine at the time of start-up.
- an antifreeze liquid is circulated through the high-temperature side heat exchange ⁇ 4 in the first stack 3 a and the low-temperature side heat exchange 6 in the second stack 3 b with the inert gas sealed in the loop tube 2.
- the low temperature input heat exchange ⁇ 5 of the first stack 3a is cooled to 20 ° C--60 ° C or the like.
- a temperature gradient is generated in the first stack 3a due to the temperature difference between the low-temperature input-side heat exchange 5 and the high-temperature-side heat exchange 4, and the working fluid first starts to fluctuate when it is very small. Then, the working fluid starts to vibrate greatly and circulates in the loop pipe 2.
- a standing wave and a traveling wave are generated in the loop tube 2, and the heat energy is transferred from the high-temperature heat exchanger 4 to the low-temperature heat exchanger 6 according to the law of energy conservation. Sound energy propagates in the opposite direction. This sound energy is efficiently reflected at the corners 2c, 20c, etc. of the loop tube 2 and propagated to the second stack 3b side. On the second stack 3b, this sound energy is transmitted to the high-temperature output heat exchange 7 side and the low-temperature heat exchange 6 side. Then, the working fluid contracts due to the pressure change and the volume change of the working fluid based on the standing wave and the traveling wave, and at that time, the heat released is output to the high-temperature output side heat exchanger 7. Thereby, heating using the effect of thermoacoustic becomes possible.
- sound waves are self-excited by a temperature gradient between the high-temperature heat exchange 4 and the low-temperature input heat exchange 5 provided on the first stack 3a side.
- a sound wave generator 8 is provided in order to shorten the generation time of the standing wave and the traveling wave.
- the sound wave generator 8 is constituted by a speaker, a piezoelectric element, and other devices for forcibly vibrating the working fluid from the outside, and is provided along the outer peripheral surface of the loop tube 2, or Provided inside tube 2.
- the sound wave generator 8 is preferably installed with an interval of 1Z2 wavelength and 1Z4 wavelength of the generated standing wave and traveling wave, and the loop tube 2 is arranged in accordance with the traveling direction of the standing wave and the traveling wave. It is preferable to provide such that the working fluid is forcedly vibrated in the axial direction.
- an acoustic heating system 100 in which a plurality of acoustic heating devices 1 are connected. Can be used.
- la and lb- "In indicate the acoustic heating devices 1 configured as described above, and the first acoustic heating device la and the second acoustic heating device lb-the n-th acoustic heating device.
- the low temperature input side heat exchangers 5 in these acoustic heaters 1 ⁇ are all placed in a cold environment such as outdoors, and have a temperature of 20 ° C and 60 ° C.
- the high-temperature output heat exchange 7 of each of the acoustic heating devices la... Is connected to the high-temperature heat exchanger 4 of the adjacent acoustic heating devices lb.
- a temperature gradient greater than the temperature gradient of the first stack 3a in the first acoustic heating device la can be generated in the first stack 3a of the adjacent acoustic heating device lb, thereby sequentially moving downstream.
- the temperature gradient of the acoustic heating device In increases, In this way, it is possible to output higher heat from the device In.
- the first stack 3a sandwiched between the high-temperature side heat exchanger 4 and the low-temperature input side heat exchange 5 is provided inside the first pipe portion 2a
- a second stack 3b sandwiched between the low-temperature heat exchange 6 and the high-temperature output heat exchange 7 is provided inside the second pipe portion 2b
- the second heat exchange 5 is cooled by cooling the low-temperature input heat exchange 5.
- a standing wave and a traveling wave are generated in one tube section 2a, and the standing wave and the traveling wave are propagated from the first tube section 2a to the second tube section 2b, so that the temperature gradient is generated in the second stack 3b.
- thermoacoustic effect is used, heating can be performed without using an environment-friendly medium such as chlorofluorocarbon or a compressor. Further, such a device 1 can be used as a thermostat for overcooling.
- the loop pipe 2 having the first pipe section 2a and the second pipe section 2b that also raises the ground force is used, the cool air based on the cold heat input to the low-temperature input-side heat exchanger 5 is used. Can be released below the first tube portion 2a, and a large temperature gradient can be generated in the first stack 2a, so that quick self-excited sound waves can be generated.
- the first stack 3a is provided at a higher position than the second stack 3b, it is possible to secure a large space under the low temperature input side heat exchanger 5 for allowing cool air to escape. This makes it possible to generate a large temperature gradient in the first stack 3a and quickly generate self-excited sound waves.
- the low-temperature input-side heat exchange 5 is provided below the first stack 3a, and the high-temperature-side heat exchanger 4 is provided above the first stack 3a.
- the cool air from the vessel 5 will no longer flow into the first stack 3a, and a large temperature gradient will be generated in the first stack 3a, thereby facilitating the generation of self-excited sound waves.
- the center of the first stack 3a is set at 0.28 ⁇ 0.05 of the total circuit length.
- the temperatures of the high-temperature side heat exchanger 4 and the low-temperature input side heat exchanger 5 in one stack 3a are appropriate, self-excited sound waves can be generated more quickly.
- the pressure fluctuation of the sealed working fluid along the circuit has a first peak near the first stack 3a and further advances by about 1Z2 of the total circuit length.
- the second stack 3b is provided so that the center of the second stack is located at a position beyond the second peak. Cooling efficiency and heating efficiency can be improved.
- first pipe section 2a and the second pipe section 2b are configured to be longer than the connecting pipe section 2d, so that a large space for releasing cool air or warm air can be secured, thereby increasing the size. It is possible to promote the generation of self-excited sound waves based on the generation of a large temperature gradient.
- first tube portion is lengthened, the disturbance of the wave front of the sound wave can be reduced, and the standing wave and the traveling wave can be efficiently generated.
- the arc shape or 45-degree linear shape makes the standing wave and traveling wave propagating in the loop tube 2 not return to the original direction, and the connecting tube portion 2d Sound energy can be propagated to such places.
- the sound wave generator 8 for generating a standing wave and a traveling wave is provided on the outer peripheral portion or inside the loop tube 2, not only self-excited sound waves but also the sound wave generator 8 Due to the forced vibration, a standing wave and a traveling wave can be more quickly generated in the loop tube 2.
- the material of the first stack and / or the second stack is at least one kind of ceramics, sintered metal, wire mesh, and metal non-woven fabric. Since the angular frequency ( ⁇ : temperature relaxation time) of the fluid is in the range of 0.2 to 20, self-excited sound waves can be generated more quickly and efficiently.
- a plurality of such acoustic heating devices 1 are provided, and the high-temperature output heat exchange 7 of one acoustic heating device la ... and the high-temperature heat exchange 4 of the adjacent acoustic heating device lb ... Because of the connection, the temperature gradient of the first stack 2a can be gradually increased for each of the adjacent acoustic heating devices la, and a larger amount of heat can be output at the terminal acoustic heating device In. Become like
- the loop pipe 2 having a substantially rectangular shape has been described as an example.
- the loop pipe 2 that is partially meandered depending on the installation environment or the like is used. Is also good.
- the corners have an arc shape as in the present embodiment.
- the inner diameter of the pipe may be appropriately changed in consideration of energy loss and installation environment.
- FIG. 1 is a schematic cross-sectional view of an acoustic heating device according to a first embodiment.
- FIG. 2 is an enlarged view showing a corner of a loop tube in the same embodiment.
- FIG. 3 is an enlarged view showing a corner of a loop tube according to another embodiment.
- FIG. 4 is a schematic sectional view of a stack according to the first embodiment.
- FIG. 5 is a schematic cross-sectional view of an acoustic heating device according to another embodiment.
- FIG. 6 is a schematic diagram of an acoustic heating system in which acoustic heating devices are connected. Explanation of reference numerals
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/594,277 US7804046B2 (en) | 2004-03-26 | 2005-03-23 | Acoustic heater and acoustic heating system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004091683A JP4443971B2 (ja) | 2004-03-26 | 2004-03-26 | 音響暖房装置、及び音響暖房システム |
| JP2004-091683 | 2004-03-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005093339A1 true WO2005093339A1 (ja) | 2005-10-06 |
Family
ID=35056279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/005219 Ceased WO2005093339A1 (ja) | 2004-03-26 | 2005-03-23 | 音響暖房装置、及び、音響暖房システム |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7804046B2 (ja) |
| JP (1) | JP4443971B2 (ja) |
| WO (1) | WO2005093339A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011149670A (ja) * | 2010-01-25 | 2011-08-04 | Isuzu Motors Ltd | 熱音響機関 |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005274100A (ja) * | 2004-03-26 | 2005-10-06 | Doshisha | 熱音響装置及び熱音響システム |
| JP4901283B2 (ja) * | 2006-04-21 | 2012-03-21 | 学校法人同志社 | スタック及びその製造方法 |
| JP2008249223A (ja) * | 2007-03-30 | 2008-10-16 | Doshisha | スタック及びその製造方法 |
| US8584471B2 (en) * | 2010-04-30 | 2013-11-19 | Palo Alto Research | Thermoacoustic apparatus with series-connected stages |
| JP2012112621A (ja) * | 2010-11-26 | 2012-06-14 | Tokai Univ | 熱音響機関 |
| US9163581B2 (en) * | 2012-02-23 | 2015-10-20 | The United States Of America As Represented By The Administrator Of National Aeronautics And Space Administration | Alpha-stream convertor |
| JP6179341B2 (ja) | 2013-10-23 | 2017-08-16 | いすゞ自動車株式会社 | 熱音響昇温機 |
| 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 |
| JP2022007676A (ja) | 2020-06-26 | 2022-01-13 | 新東工業株式会社 | 熱音響冷却器 |
| CN116951815A (zh) * | 2022-04-15 | 2023-10-27 | 中国科学院理化技术研究所 | 热驱动热声转换系统及制冷机 |
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 (3)
| 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 |
| 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 |
| US6368482B1 (en) * | 2000-09-19 | 2002-04-09 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration, Washington, Dc (Us) | Plating processes utilizing high intensity acoustic beams |
-
2004
- 2004-03-26 JP JP2004091683A patent/JP4443971B2/ja not_active Expired - Fee Related
-
2005
- 2005-03-23 WO PCT/JP2005/005219 patent/WO2005093339A1/ja not_active Ceased
- 2005-03-23 US US10/594,277 patent/US7804046B2/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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011149670A (ja) * | 2010-01-25 | 2011-08-04 | Isuzu Motors Ltd | 熱音響機関 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005274099A (ja) | 2005-10-06 |
| JP4443971B2 (ja) | 2010-03-31 |
| US7804046B2 (en) | 2010-09-28 |
| US20070221367A1 (en) | 2007-09-27 |
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