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WO2024121809A1 - Amélioration de l'effet thermoacoustique - Google Patents

Amélioration de l'effet thermoacoustique Download PDF

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Publication number
WO2024121809A1
WO2024121809A1 PCT/IB2023/062407 IB2023062407W WO2024121809A1 WO 2024121809 A1 WO2024121809 A1 WO 2024121809A1 IB 2023062407 W IB2023062407 W IB 2023062407W WO 2024121809 A1 WO2024121809 A1 WO 2024121809A1
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WO
WIPO (PCT)
Prior art keywords
stack
fluid
thermoacoustic device
phase changing
zone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2023/062407
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English (en)
Inventor
Yehuda Agnon
Guy Ramon
Avishai MEIR
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technion Research and Development Foundation Ltd
Original Assignee
Technion Research and Development Foundation Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Technion Research and Development Foundation Ltd filed Critical Technion Research and Development Foundation Ltd
Priority to EP23900170.4A priority Critical patent/EP4630741A1/fr
Publication of WO2024121809A1 publication Critical patent/WO2024121809A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00—Hot gas positive-displacement engine plants
    • F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
    • F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G2243/00—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes
    • F02G2243/30—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes having their pistons and displacers each in separate cylinders
    • F02G2243/50—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes having their pistons and displacers each in separate cylinders having resonance tubes
    • F02G2243/54—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes having their pistons and displacers each in separate cylinders having resonance tubes thermo-acoustic
    • 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

  • oscillating gas flows i.e., sound waves
  • acoustic waves can be made to execute the cyclic thermodynamics of a heat engine, a heat pump, or a separation process. This process is controlled by placing a porous solid called a “stack” or “regenerator” under a temperature gradient. If the temperature gradient is high enough, work will be created by converting heat into acoustic oscillation. If acoustic oscillations are introduced by a source external to the stack, heat will be pumped from one side of the stack to the other, where a cold and a hot heat exchangers are placed.
  • a relatively low power density means that the gas within the resonator must be pressurized, typically above 30 bars to reach useful outputs, thus creating a sealing and safety challenge.
  • Stack - in the heart of a thermoacoustic system is a porous solid referred to as “stack” or “regenerator” in some applications (see figure 1), which is usually fabricated from a ceramic material, and contains channels whose dimensions are determined by the characteristic frequency and working materials in the system.
  • the current invention revolves around several aspects of the design of such stack to accommodate phase changes of the working material.
  • thermoacoustic devices and methods for operating the thermoacoustic devices.
  • FIG. 1 illustrates an example of a stack
  • FIG. 2 illustrates an example of a thermoacoustic device and performances of stacks
  • FIG. 3 illustrates an example of experimental results from a thermoacoustic engine with a cellulose stack developed in the lab
  • FIG. 4 illustrates an example of modeled results
  • FIG. 5 illustrates an example of three vapor pressure versus location within the stack curves and of N channels
  • FIG. 6 illustrates two example of channels
  • FIG. 7 illustrates an example of illustrating N channels
  • FIGs. 9-10 illustrate a liquid stream that replaces mass with the oscillating gas by absorbing and releasing a dissolve component
  • FIG. 11 illustrates an example of a stack in a curved shape
  • FIG. 12 illustrates an example of small semi permeable channels
  • FIG. 13 illustrates a method for operating a thermoacoustic device
  • FIG. 14 illustrates a method for operating a thermoacoustic device
  • FIG. 15 illustrates a method for operating a thermoacoustic device
  • FIG. 16 illustrates a method for operating a thermoacoustic device
  • FIG. 17 illustrates a method for operating a thermoacoustic device
  • FIG. 18 illustrates an example of a sidewall of a channel
  • FIG. 19 illustrates an example of a cross sectional view of a channel, taken along a longitudinal axis of the channel
  • FIG. 20 illustrates examples channels having different cross sections.
  • the term fluid refers to, at least one of a phase changing fluid, a sorption inducing fluid, a hydrates formation inducing fluid, or a sublimation inducing fluid.
  • any reference to (i) either one of a fluid, a working fluid, a phase changing fluid, a sorption inducing fluid, a hydrates formation inducing fluid, or a sublimation inducing fluid - should be applied mutatis mutandis to (ii) any other one of a fluid, a working fluid, a phase changing fluid, a sorption inducing fluid, a hydrates formation inducing fluid, or a sublimation inducing fluid.
  • thermoacoustic stack There are provided several methods to realize a completely new process of mixture separation using acoustic streaming based on boiling point differences. [0038] There are provided new geometries and characteristics for a thermoacoustic stack, which are fundamentally different from the current requirements.
  • thermoacoustic devices - mixture separation introduces a completely new area of application for thermoacoustic devices - mixture separation.
  • thermoacoustics In general, thermoacoustics rely on heat conduction between gas and solid. However, it has also been suggested that a mixture containing a condensable vapor may offer potential improvements to the process, undergoing evaporation and condensation. We have taken this concept a step further, to consider any form of phase exchange - adsorption (gas/solid) or absorption (gas/liquid). The cycle is then augmented - with mass transfer. In our conceptualization of this mechanism, when the gas is displaced and compressed, heat is still exchanged in the process - but primarily as the latent heat of the phase change process, which can be far greater.
  • thermoacoustics Herein lies the potential of the mass transfer-based version of thermoacoustics, which has been shown to possess the potential to greatly improve the performance of thermoacoustic devices. Specifically, in an earlier project, the publications originating from the lab have demonstrated this potential, theoretically and experimentally. The phase-exchange process can be carried out at lower temperatures, yet still release large amounts of energy that can trigger and amplify the acoustic oscillations. This constitutes two main advantages over existing thermoacoustic technology:
  • thermoacoustic phase change not only in heat engines, but also as a means for separation processes.
  • thermoacoustic excitation involves introducing multiple phase-changing components to the gas mixture. By doing so, we enable the system to operate at a large range of temperatures, while improving efficiency and energy density. Moreover, these methods also allow realizing a completely new process - mixture separation using acoustic streaming based on boiling point differences. [0047] These new methods and processes were partly tested in the lab and constitute the basis on which future development of the technology will be carried out, including in the framework of collaboration with external partners.
  • thermoacoustic system compared to the classical “dry” mode of excitation.
  • thermoacoustic device 20 that includes a stack 50 that is located between a sealed top 23 and a sealed bottom 21.
  • the stack is a ceramic stack that is compared with a cellulose stack developed in the lab. After one hour of heating to 220 degrees Celsius, the ceramic Cordierite stack loses its water content, as can be seen by the sudden rapid rise in temperature. In comparison, the absorbent cellulose stack maintains its water content by re-absorption, which limits the rise in temperature.
  • FIG. 3 presents a graph 30 that illustrates experimental results from a thermoacoustic engine with a cellulose stack developed in the lab.
  • the temperature difference required to induce acoustic oscillations is significantly lower in the “wet” engine compared with the “dry” one.
  • a “wet” engine produces significantly more acoustic output than the “dry” engine, which means improved energy density.
  • FIG. 4 presents a graph 34 that illustrates modeled results in which, under a similar temperature difference, a thermoacoustic “wet” engine may generate approximately twice the acoustic power under 1 bar of resonator pressure, compared to the same setup using a classical dry stack, where 70 bars of resonator pressure are required to reach onset in similar temperature conditions. In practice this means both enabling utilization of low-grade heat sources, and also a much simpler resonator construction.
  • FIG. 5 illustrates (i) Graph 34 includes three vapor pressure versus location within the stack curves 41, 42 and 43 - of three different components that boil at three different temperatures, and also illustrates (ii) N channels 50(l)-50(2), a low temperature (Tl(low) 61) of a cold zone and a high temperature (T2(high) 62) of a hot zone.
  • thermoacoustic stack To replenish the liquid lost from the stack during the work of the thermoacoustic system, we propose using an open cell absorptive stack , in which liquid that accumulates on one end of the solid, is quickly soaked into the wall, and driven back to the drier section where it reenters the thermoacoustic cycle. Two examples are provided in figure 6.
  • FIG. 6 illustrates two example of channels (having body 74 that surrounds an inner space 75) - that differ from each other by the width of their grooves.
  • the lower example also shows the capillary flow 74.
  • the upper example (with the narrower grooves) exhibits a slower absorption of the phase changing fluid - in comparison to the lower example. In both cases there is a flow (through the wall) of fluid from the cold zone 71 to the hot zone 72.
  • a parallel plate stack is preferable over a rectangular or circular channel stack. Nevertheless, parallel plate stacks have less surface area than the former, channeled ones. To overcome this, a parallel plate stack can be designed as undulating plates, thus avoiding clogging in narrow channels, and still maintaining plenty available surface area.
  • FIG 7 - illustrating N channels 89(1)- 89(N).
  • Figure 8 illustrates an example of replenishing the liquid lost during system operation, is by placing absorptive wicks (wicking elements 83) or sprayers (spraying elements 84) against the stack, which take liquid from a liquid reservoir 81 (where it accumulates), to the beginning of the process. These wicks can also be placed on both sides of the stack, and in contact with a liquid reservoir, where liquid is constantly drawn from one side of the reservoir and condensed and collected at the end of the processed cycle into the same reservoir.
  • wicking elements 83 absorptive wicks
  • sprayers sprayers
  • the working fluid can function also as the heat transfer fluid.
  • the fluid is inserted in the middle of the stack and flows through both sides of the stack in a spatially uniform manner. During flow, the fluid exchanges heat with both sides of the stack, where one stream is heated, and the other one cooled. The two streams can the exchange heat with an external source and sink and return to the starting location and inserted again.
  • Figure 9 illustrates a fluid input 99 that is positioned between the hot zone 97 and the cold zone 97 and is configured to receive a fluid at an intermediate temperature (T1 92), the intermediate temperature is lower than the temperature of the hot zone (T2) and is higher than the temperature of the cold zone (T3); multiple first stack channel portions 91(1)-91(N) and multiple second stack channel portions 95(1)- 95(N) that form multiple stack channels.
  • Figure 9 also illustrates the liquid 92 removed from the multiple second stack channel portions 95(1)- 95(N) and the liquid 93 removed from the multiple first stack channel portions 91(1)- 91(N).
  • Figure 10 illustrates an example of a diluted liquid 102 that is inserted to a stack having stack channels 101(l)-101(N), concentrated liquid 104 being released from the stack, and an accumulation of clear solvent 103.
  • thermoacoustic device There may be provide a method for operating a thermoacoustic device. According to an embodiment, the method includes operating any one of the thermoacoustic devices of the current application.
  • FIG. 13-17 illustrate method 1300-1700, each including various steps executable during working - while making acoustic waves execute the cyclic thermodynamics of a heat engine, a heat pump, or a separation process.
  • the role of the thermoacoustic system (for example - heat engine, a heat pump, or a separation process) defines at least a direction of propagation of the acoustic waves.
  • these examples refer to a reception, by a cold zone of a stack of a resonator of a thermoacoustic device, at least one fluid from a hot zone of the stack.
  • the reception is attributed at least in part to the propagation of acoustic waves from the hot zone to the cold zone.
  • the propagation of acoustic waves can be from the cold zone to the hot zone - and that the al least one fluid can be received by the hot zone and from the cold zone - and any of the methods may include, for example, conveying, by a conveyor, at least some of the at least one fluid from the hot zone of the stack to the cold zone of the stack.
  • FIG. 13 illustrates an method 1300 for operating a thermoacoustic device.
  • method 1300 includes step 1310 of receiving, by a cold zone of a stack of a resonator of a thermoacoustic device, at least one fluid from a hot zone of the stack. A temperature of the hot zone exceeds a temperature of the cold zone.
  • method 1300 also includes step 1320 of conveying, by a conveyor, at least some of the at least one fluid from the cold zone of the stack to the hot zone of the stack.
  • the at least one fluid is at least one sorption inducing fluid.
  • the at least one fluid is at least one hydrates formation inducing fluid.
  • the at least one fluid is at least one sublimation inducing fluid.
  • method 1400 includes step 1410 of receiving, by a cold zone of a stack of a resonator of a thermoacoustic device, from a hot zone of the stack, a mixture of phase changing fluids that have different boiling temperatures.
  • a temperature of the hot zone exceeds a temperature of the cold zone.
  • the temperature of the cold zone is lower than each one of the different boiling temperatures.
  • Figure 15 illustrates an example of method 1500.
  • Step 1510 is executed while operating - while making acoustic waves to execute the cyclic thermodynamics of a heat engine, a heat pump, or a separation process.
  • method 1600 includes step 1610 of receiving, by a cold zone of a stack of a resonator of a thermoacoustic device, from a hot zone of the stack, at least one fluid.
  • method 1600 also includes step 1620 of providing, by an auxiliary fluid supplier, at least a part of the at least one fluid to the hot zone of the stack.
  • the auxiliary fluid supplier is an auxiliary phase changing fluid supplier.
  • Other fluids mentions in the application can be provided by other auxiliary fluid suppliers.
  • method 1700 includes step 1710 of receiving, by a fluid input, fluid at an intermediate temperature.
  • the input is associated with a stack of a resonator of a thermoacoustic device.
  • the stack has a cold zone and a hot zone.
  • the intermediate temperature is between a temperature of the cold zone and a temperature of the hot zone.
  • the fluid input is fed to an intermediate zone that is positioned between the hot zone and the cold zone.
  • the hot zone is hotter than the cold zone.
  • the fluid that passes through the first stack channels passes through a heat exchanging path back to the fluid input.
  • the fluid that passes through the second stack channels passes through a heat exchanging path back to the fluid input.
  • the channels of a stack may be arranged in a linear array or in a two dimensional array.
  • the stack includes multiple stack structural elements that form multiple stack channels.
  • the at least some of the stack structural elements are made from a porous material that includes capillary conduits for conveying the at least some of the at least one phase changing fluid from the cold zone of the stack to the hot zone of the stack.
  • the porous material is cellulose.
  • the at least some of the stack structural elements are shaped to form external capillary conduits for conveying the at least some of the at least one phase changing fluid from the cold zone of the stack to the hot zone of the stack.
  • the at least one phase changing fluid is a mixture of phase changing fluids that have different boiling temperatures.
  • the temperature of the cold zone is lower than each one of the different boiling temperatures.
  • the temperature of the hot zone is higher than each one of the different boiling temperatures.
  • the temperature of the hot zone is lower than at least one of the different boiling temperatures.
  • thermoacoustic device that includes a resonator that includes a stack.
  • a cold zone of the stack is configured to receive, from a hot zone of the stack, a mixture of phase changing fluids that have different boiling temperatures; wherein a temperature of the hot zone exceeds a temperature of the cold zone, and (ii) the temperature of the cold zone is lower than each one of the different boiling temperatures.
  • the temperature of the hot zone is higher than each one of the different boiling temperatures.
  • the stack includes multiple stack structural elements that form multiple stack channels.
  • thermoacoustic device that includes a resonator that includes a stack.
  • the stack includes multiple stack structural elements that form multiple stack channels.
  • a cold zone of the stack is configured to receive a phase changing fluid from a hot zone of the stack; wherein a temperature of the hot zone exceeds a temperature of the cold zone; and
  • the multiple stack structural elements are undulating along a traverse direction that is oriented to a longitudinal axis of the stack.
  • thermoacoustic device that includes a resonator that includes a stack. During operation a cold zone of the stack is configured to receive a phase changing fluid from a hot zone of the stack; wherein a temperature of the hot zone exceeds a temperature of the cold zone.
  • the thermoacoustic device further includes an auxiliary phase changing fluid supplier that is configured to provide a phase changing fluid to the hot zone of the stack.
  • the auxiliary phase changing fluid supplier is configured to convey at least some of the phase changing fluid from the cold zone of the stack to the hot zone of the stack.
  • thermoacoustic device that includes a resonator that includes a stack.
  • the stack includes (i) a hot zone and a cold zone, wherein a temperature of the hot zone exceeds a temperature of the cold zone; (ii) a phase changing fluid input that is positioned between the hot zone and the cold zone and is configured to receive a phase changing fluid at an intermediate temperature, the intermediate temperature is lower than the temperature of the hot zone and is higher than the temperature of the cold zone; and (iii) multiple first stack channel portions and multiple second stack channel portions that form multiple stack channels.
  • the first stack channel portions are formed between the hot zone and an intermediate zone, the intermediate zone is fed by the phase changing fluid input.
  • the second stack channel portions are formed between the intermediate zone and the cold zone.
  • thermoacoustic device includes a first heat exchange unit that is configured to (i) receive, from the hot zone, the phase changing fluid, (ii) exchange heat, and (iii) output the phase changing fluid at the intermediate temperature.
  • thermoacoustic device includes a second heat exchange unit that is configured to (i) receive, from the cold zone, the phase changing fluid, (ii) exchange heat, and (iii) output the phase changing fluid at the intermediate temperature.
  • the phase changing fluid input is configured to receive the phase changing fluid from each one of the first heat exchange unit and the second heat exchange unit.
  • a thermoacoustic device that includes a resonator that includes a stack, the stack includes multiple stack structural elements that form multiple stack channels that are curved. During operation during operation a cold zone of the stack is configured to receive a phase changing fluid from a hot zone of the stack. A temperature of the hot zone exceeds a temperature of the cold zone.
  • the multiple stack channels are curved long a longitudinal axis of the stack.
  • thermoacoustic device that includes a resonator that includes a stack.
  • the stack includes multiple stack structural elements that form multiple stack channels.
  • a cold zone of the stack is configured to receive a phase changing fluid from a hot zone of the stack, wherein a temperature of the hot zone exceeds a temperature of the cold zone.
  • At least one of the multiple stack structural element is semi-permeable.
  • thermoacoustic device that includes (i) a resonator that includes a stack; wherein during operation, a cold zone of the stack is configured to receive at least one fluid from a hot zone of the stack; wherein a temperature of the hot zone exceeds a temperature of the cold zone; and (ii) a conveyor for conveying at least some of the at least one fluid from the cold zone of the stack to the hot zone of the stack.
  • the at least one fluid is an at least one phase changing fluid.
  • the conveyor is the stack.
  • the stack includes multiple stack structural elements that form multiple stack channels.
  • the at least some of the stack structural elements are made from a porous material that includes capillary conduits for conveying the at least some of the at least one phase changing fluid from the cold zone of the stack to the hot zone of the stack.
  • the porous material is cellulose.
  • Other porous materials can be used.
  • the at least some of the stack structural elements are shaped to form external capillary conduits for conveying the at least some of the at least one phase changing fluid from the cold zone of the stack to the hot zone of the stack.
  • the at least one phase changing fluid is a mixture of phase changing fluids that have different boiling temperatures.
  • the temperature of the cold zone is lower than each one of the different boiling temperatures.
  • the temperature of the hot zone is higher than each one of the different boiling temperatures.
  • the temperature of the hot zone is lower than at least one of the different boiling temperatures.
  • the stack includes multiple stack structural elements that form multiple stack channels.
  • the stack includes multiple stack structural elements that form multiple stack channels wherein the multiple stack structural elements are undulating along a traverse direction that is oriented to a longitudinal axis of the stack.
  • the conveyor is an auxiliary phase changing fluid supplier.
  • the auxiliary phase changing fluid supplier includes a collector for collecting phase changing fluid from the cold zone, a fluid conduit for conveying the phase changing fluid, and a wicking element for providing the phase changing fluid to the hot zone.
  • the fluid conduit is located outside the stack channels.
  • the auxiliary phase changing fluid supplier is a spraying element.
  • the stack includes multiple stack structural elements that form multiple stack channels that are curved.
  • the stack includes multiple stack structural elements wherein at least one of the multiple stack structural element is semi-permeable.
  • the stack includes multiple stack structural elements wherein at least one of the multiple stack structural element is semi-permeable.
  • the at least one fluid is at least one sorption inducing fluid.
  • the at least one fluid is at least one hydrates formation inducing fluid.
  • the at least one fluid is at least one sublimation inducing fluid.
  • a method of operating a thermoacoustic device Examples of thermoacoustic devices being operated by the method are illustrated above and/or in any of the figures.
  • thermoacoustic device includes receiving, by a cold zone of a stack of a resonator of a thermoacoustic device, at least one fluid from a hot zone of the stack; wherein a temperature of the hot zone exceeds a temperature of the cold zone; and conveying, by a conveyor of the stack, at least some of the at least one fluid from the cold zone of the stack to the hot zone of the stack.
  • the at least one fluid is at least one sorption inducing fluid.
  • the at least one fluid is at least one hydrates formation inducing fluid.
  • the at least one fluid is an at least one phase changing fluid.
  • the at least one phase changing fluid is a mixture of phase changing fluids that have different boiling temperatures.
  • the conveyor is the stack.
  • the conveyor is an auxiliary phase changing fluid supplier.
  • thermoacoustic device that includes a resonator that includes wherein the resonator includes a stack, wherein the stack includes (a) a hot zone and a cold zone; wherein a temperature of the hot zone exceeds a temperature of the cold zone; (ii) a fluid input that is positioned between the hot zone and the cold zone and is configured to receive a fluid at an intermediate temperature, the intermediate temperature is lower than the temperature of the hot zone and is higher than the temperature of the cold zone; and (iii) multiple first stack channel portions and multiple second stack channel portions that form multiple stack channels.
  • the first stack channel portions are formed between the hot zone and an intermediate zone, the intermediate zone is fed by the fluid input.
  • the second stack channel portions are formed between the intermediate zone and the cold zone.
  • the at least one fluid is an at least one phase changing fluid.
  • the thermoacoustic device includes a first heat exchange unit that is configured to (i) receive, from the hot zone, the phase changing fluid, (ii) exchange heat, and (iii) output the phase changing fluid at the intermediate temperature.
  • thermoacoustic device includes a second heat exchange unit that is configured to (i) receive, from the cold zone, the phase changing fluid, (ii) exchange heat, and (iii) output the phase changing fluid at the intermediate temperature.
  • the phase changing fluid input is configured to receive the phase changing fluid from each one of the first heat exchange unit and the second heat exchange unit.
  • any arrangement of components to achieve the same functionality is effectively “associated” such that the desired functionality is achieved.
  • any two components herein combined to achieve a particular functionality may be seen as “associated with” each other such that the desired functionality is achieved, irrespective of architectures or intermedial components.
  • any two components so associated can also be viewed as being “operably connected,” or “operably coupled,” to each other to achieve the desired functionality.
  • any reference signs placed between parentheses shall not be construed as limiting the claim.
  • the word ‘comprising’ does not exclude the presence of other elements or steps then those listed in a claim.
  • the terms “a” or “an,” as used herein, are defined as one or more than one.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention concerne un dispositif thermoacoustique qui comprend un résonateur, le résonateur comprenant un empilement. Pendant le fonctionnement, une zone froide de l'empilement est configurée pour recevoir au moins un fluide à partir d'une zone chaude de l'empilement ; une température de la zone chaude dépassant une température de la zone froide. Le dispositif thermoacoustique comprend également un transporteur pour transporter au moins une partie dudit au moins un fluide de la zone froide de l'empilement à la zone chaude de l'empilement.
PCT/IB2023/062407 2022-12-08 2023-12-08 Amélioration de l'effet thermoacoustique Ceased WO2024121809A1 (fr)

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US202263386665P 2022-12-08 2022-12-08
US63/386,665 2022-12-08

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090282838A1 (en) * 2008-05-13 2009-11-19 Edwin Thurnau Method, apparatus, and system for cooling an object
US20110252812A1 (en) * 2010-04-20 2011-10-20 King Abdul Aziz City For Science And Technology Travelling wave thermoacoustic piezoelectric refrigerator
US20140050293A1 (en) * 2012-08-16 2014-02-20 The Penn State Research Foundation Thermoacoustic enhancements for nuclear fuel rods and other high temperature applications

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090282838A1 (en) * 2008-05-13 2009-11-19 Edwin Thurnau Method, apparatus, and system for cooling an object
US20110252812A1 (en) * 2010-04-20 2011-10-20 King Abdul Aziz City For Science And Technology Travelling wave thermoacoustic piezoelectric refrigerator
US20140050293A1 (en) * 2012-08-16 2014-02-20 The Penn State Research Foundation Thermoacoustic enhancements for nuclear fuel rods and other high temperature applications

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