CN109458315A - With the enclosed traveling wave thermoacoustic prime mover of gas-liquid phase transition - Google Patents
With the enclosed traveling wave thermoacoustic prime mover of gas-liquid phase transition Download PDFInfo
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- CN109458315A CN109458315A CN201811598778.1A CN201811598778A CN109458315A CN 109458315 A CN109458315 A CN 109458315A CN 201811598778 A CN201811598778 A CN 201811598778A CN 109458315 A CN109458315 A CN 109458315A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sorption Type Refrigeration Machines (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a kind of enclosed traveling wave thermoacoustic prime movers of adjoint gas-liquid phase transition.It includes a loop traveling wave thermo-acoustic unit and a phase modulation unit；The loop traveling wave thermo-acoustic unit includes hot end heat exchanger, regenerator, cool end heat exchanger, U-tube, feedback pipe and acoustic capacitance pipe, and hot end heat exchanger, regenerator, cool end heat exchanger, U-tube, feedback pipe and acoustic capacitance pipe are circumferentially sequentially connected with and constitute circuit；The phase modulation unit includes load pipe and air reservoir, and the U-tube of load pipe one end linkloop traveling wave thermo-acoustic unit, the other end are connected with air reservoir；Wherein, in loop traveling wave thermo-acoustic unit and phase modulation unit filled with can phase-change working substance, and can the liquid level of phase-change working substance in the operating condition be located among regenerator.It is characteristic of the invention that using can phase change fluid as working medium, can realize starting of oscillation under the lesser hot and cold side temperature difference, at the same improve unit volume working medium acting ability, be advantageously implemented the miniaturization of thermoacoustic system.
Description
Technical field
The present invention relates to thermo-acoustic engine more particularly to a kind of enclosed traveling wave thermoacoustic prime movers of adjoint gas-liquid phase transition.
Background technique
Thermoacoustic engine realizes conversion of the thermal energy to mechanical energy based on thermoacoustic effect, is distributed energy resource system and energy ladder
Grade utilizes the cutting edge technology in field.Thermoacoustic engine is usually only made of heat exchanger, regenerator and resonatron, has structure letter
Single, high reliability.It can use the low-grade energies such as solar energy, industrial waste heat as driving heat source.
In past three ten years, thermoacoustic engine research has obtained remarkable break-throughs.Especially U.S.'s Loews-I not
The thermoacoustic machine engine of Backhaus and Swift of this National Laboratory et al. invention, the pressure wave based on traveling-wave phase
Work, highest can obtain 30% or more transfer efficiency, can and Diesel of the transfer efficiency between 25%~40% send out
Motivation compares favourably.However, traditional traveling wave thermoacoustic prime mover mostly uses single phase gas as working medium, required driving heat source temperature
Higher (being usually above 300 DEG C)；In addition, also being limited by the hot physical property such as the gas working medium velocity of sound, specific heat and density, the axial direction of system
Size is generally large (about 4-10m).
The conversion process between thermal energy-mechanical energy can be enhanced introducing gas-liquid phase transition process in thermoacoustic engine, and then dropped
Driving heat source temperature needed for low, to expand its applicability to low-grade heat source.The middle promulgated by the State Council of Publication No. CN102734099A
Bright patent document discloses a kind of standing wave type gas-liquid phase transition thermoacoustic engine of low-grade heat source driving.It includes sequentially connected
Primary heater, the first thermal buffer tube, the first cooler, U-tube, the second cooler, the second thermal buffer tube, secondary heater.
The invention is based on gas-liquid phase transition thermoacoustic effect and realizes Sonic heat changing, can small temperature difference high pressure ratio operation.However, the standing wave type heat
There are insufficient heat exchanging process during Sonic heat changing for phonomotor, and thermodynamic cycle is intrinsic irreversible, limits its turn
Change the raising of efficiency.
The Chinese invention patent document of Publication No. CN104079142A discloses a kind of thermoacoustic of dual temperature position heat source driving
Three phase AC power generating system, the Sonic heat changing device including hydromagnetic generating device and composition loop.The liquid phase heating
Sound switching mechanism includes room temperature heat exchanger, fluid cushion pipe and mid temperature heat exchanger.Can phase-change working substance gas-liquid phase transition generate high temperature
Evaporation expansion and the effect of cryogenic condensation compression make thermoacoustic engine that self-oscillation occur.Its main feature is that can be in lesser hot and cold side
Thermoacoustic engine starting of oscillation is realized under the temperature difference.
The Chinese invention patent document of Publication No. CN105871172A discloses a kind of gas-liquid phase transition thermoacoustic engine drive
Dynamic magnetic fluid electricity generation system, including loop thermoacoustic launch device, magnetic fluid, power generator.The loop thermoacoustic is started
Device is substantially gas-liquid phase transition thermoacoustic engine, is worked using the gas-liquid phase transition of working medium, it can be achieved that the operation of the small temperature difference, is improved
The utilization rate of low-grade energy.
The Chinese invention patent document of Publication No. CN105865080A discloses a kind of low grade heat energy of Thermoacoustic engine
Converter.It includes the gas-liquid phase transition thermoacoustic engine and thermoacoustic heat pump for constituting loop, in the loop filled with can phase-change working substance,
Can phase-change working substance occur in gas-liquid phase transition thermoacoustic engine gas-liquid conversion.The working medium of the gas-liquid phase transition thermoacoustic engine is
Low boiling working fluid can realize the starting of oscillation of thermoacoustic engine and stable operation under the lesser hot and cold side temperature difference, realize to low-grade
The recycling of the energy.
Although structure described in document above effectively reduces thermoacoustic engine using with the thermoacoustic process of gas-liquid phase transition
Oscillating temperature, but all have the defects that certain.Thermoacoustic engine described in patent CN102734099A is based on standing wave phase
Pressure wave work, Sonic heat changing must rely on insufficient heat exchange, and leading to its thermodynamic cycle, there are irreversible procedures, limit
The raising of its thermal efficiency.Thermoacoustic described in patent CN104079142A, patent CN105871172A and patent CN105865080A
Although engine is loop structure, the pressure wave work substantially based on traveling-wave phase, but is the absence of efficient phase modulation structure,
It not can guarantee the sound field that thermoacoustic core is in suitable, be unfavorable for the raising of Sonic heat changing efficiency.In addition, occurring with gas-liquid phase transition
Sonic heat changing the not set regenerator of loop thermo-acoustic unit, not can guarantee fluid working substance and regenerator wire mesh wall surface it
Between realize good thermo-contact, increase non-isothermal exchange heat brought by irreversible loss.
Summary of the invention
The purpose of the present invention is in view of the deficienciess of the prior art, proposing a kind of enclosed travelling-wave type of adjoint gas-liquid phase transition
Thermoacoustic engine.
The present invention it is specific the technical solution adopted is as follows:
A kind of enclosed traveling wave thermoacoustic prime mover of adjoint gas-liquid phase transition, including a loop traveling wave thermo-acoustic unit and one
Phase modulation unit；The loop traveling wave thermo-acoustic unit includes hot end heat exchanger, regenerator, cool end heat exchanger, U-tube, feedback pipe
With acoustic capacitance pipe, and hot end heat exchanger, regenerator, cool end heat exchanger, U-tube, feedback pipe and acoustic capacitance pipe be circumferentially sequentially connected with simultaneously
Constitute circuit；The phase modulation unit includes load pipe and air reservoir, and the U-shaped of load pipe one end linkloop traveling wave thermo-acoustic unit
Pipe, the other end are connected with air reservoir；Wherein, in loop traveling wave thermo-acoustic unit and phase modulation unit filled with can phase-change working substance, and can
The liquid level of phase-change working substance in the operating condition is located among regenerator.
In the present invention, loop traveling wave thermo-acoustic unit and phase modulation unit be filled with can phase-change working substance, can phase-change working substance exist
The Sonic heat changing under Traveling wave with gas-liquid phase transition is realized at regenerator.Load pipe and air reservoir guarantee back as phase modulation unit
It is traveling-wave phase at hot device.
Preferably, being equipped with wire mesh in the regenerator.
Further, the material of the wire mesh is stainless steel, copper or other hard Heat Conduction Materials.
Preferably, the hydraulic radius of the regenerator is much smaller than the heat penetration of working medium.
Further, the ratio between heat penetration of hydraulic radius and working medium of the regenerator is 0.11~0.46.
The present invention can be directly driven using low-grade heat source, and energy stable operation, connect refrigeration machine or generator is defeated
It speaks function.In order to obtain lower oscillating temperature, can the property that should have of phase-change working substance be: boiling point is lower, saturation pressure compared with
It is high, the coefficient of viscosity is smaller, Prandtl number is lower and chemical property is stablized etc..
Preferably, it is described can phase-change working substance be water, ammonia, a chloropentafluoroethane, pentafluoroethane, 1,1,1,2- tetrafluoro second
Alkane, two chlorofluoroethanes, 1,1,1- trifluoroethane, difluoromethane, 1,1- Difluoroethane, normal butane, iso-butane, n-hexane, just oneself
Alkane, propane, heptane, octane, nonane, decane or propylene.
Further, it is described can phase-change working substance be difluoromethane.Boiling point is -51.6 DEG C to difluoromethane under normal pressure,
At a temperature of 25 DEG C, saturation pressure 1.6896MPa, latent heat of vaporization 270.91kJ/mol, liquid phase dynamic viscosity is
0.1137mPas, liquid phase Prandtl number are 1.6647, and gas phase dynamic viscosity is 0.0126mPas, and gas phase Prandtl number is
1.3492.Chemical property is stablized under normal temperature and pressure.
Further, the hot end heat exchanger is connected with heat source.
Further, the cool end heat exchanger is connected with cold source.
Further, the length ratio of the load pipe and air reservoir is 17~31, and diameter ratio is 0.08~0.15.
It is characteristic of the invention that using can phase change fluid as working medium, can be realized under the lesser hot and cold side temperature difference
Vibration, while unit volume working medium acting ability is improved, it is advantageously implemented the miniaturization of thermoacoustic system；Using load pipe and air reservoir
As phase modulation unit, guarantee that system is worked based on the pressure wave of traveling-wave phase, Sonic heat changing thermodynamic cycle is intrinsic reversible；Setting
The sufficiently small regenerator of hydraulic radius guarantees that fluid working substance and regenerator wire mesh wall surface are in good heat always and connect
Touching reduces irreversible loss brought by non-isothermal heat exchange, is expected to realize more efficient operation.
Detailed description of the invention
Fig. 1 is the enclosed traveling wave thermoacoustic prime mover structural schematic diagram with gas-liquid phase transition；
Fig. 2 be under Traveling wave at regenerator can phase-change working substance infinitesimal displacement, speed and pressure oscillation figure；
Fig. 3 be under Traveling wave at regenerator can phase-change working substance infinitesimal experience thermodynamic cycle figure.
In figure: hot end heat exchanger 1, regenerator 2, cool end heat exchanger 3, U-tube 4, feedback pipe 5, acoustic capacitance pipe 6, load pipe 7,
Air reservoir 8.
Specific embodiment
The present invention will be further described combined with specific embodiments below.
As shown in Figure 1, a kind of enclosed traveling wave thermoacoustic prime mover of adjoint gas-liquid phase transition of the invention, including a loop
Traveling wave thermo-acoustic unit and a phase modulation unit.Loop traveling wave thermo-acoustic unit includes hot end heat exchanger 1, regenerator 2, cool end heat exchanger
3, U-tube 4, feedback pipe 5 and acoustic capacitance pipe 6, and hot end heat exchanger 1, regenerator 2, cool end heat exchanger 3, U-tube 4, feedback 5 and of pipe
Acoustic capacitance pipe 6 is circumferentially sequentially connected with and constitutes circuit.Phase modulation unit includes load pipe 7 and air reservoir 8, and 7 one end of load pipe connects
The U-tube 4 of loop traveling wave thermo-acoustic unit, the other end are connected with air reservoir 8.Wherein, in loop traveling wave thermo-acoustic unit and phase modulation unit
Being filled with can phase-change working substance.The present invention use can phase-change working substance can for water, ammonia, a chloropentafluoroethane, pentafluoroethane, 1,
1,1,2- tetrafluoroethane, two chlorofluoroethanes, 1,1,1- trifluoroethane, difluoromethane, 1,1- Difluoroethane, normal butane, iso-butane,
N-hexane, n-hexane, propane, heptane, octane, nonane, decane or propylene.
In the operating condition, loop traveling wave thermo-acoustic unit and phase modulation unit are placed vertically, in loop traveling wave thermo-acoustic unit
U-tube 4 be located at bottom, acoustic capacitance pipe 6 is located at top, and hot end heat exchanger 1, regenerator 2, cool end heat exchanger 3, feedback pipe 5 are located at
Side；The main body of load pipe 7 and air reservoir 8 in phase modulation unit is vertically arranged, and 7 bottom of load pipe is connected to the bottom end of U-tube 4.
Hot end heat exchanger 1 is connected with heat source, and cool end heat exchanger 3 is connected with cold source, the concrete type of heat source and cold source can according to reality into
Row selection.Can phase-change working substance in the operating condition, be filled in U-tube 4 and load pipe 7, and the left side of U-tube 4 can phase transformation
Medium level height should be located among regenerator 2, so that can phase-change working substance adjoint gas under realization Traveling wave at regenerator 2
The Sonic heat changing that liquid phase becomes, and load pipe 7 and air reservoir 8 are used as phase modulation unit, guarantee to be traveling-wave phase at regenerator 2.
Wherein, it can be further provided with wire mesh in regenerator 2, to guarantee fluid working substance and regenerator wire mesh wall
Good thermo-contact is realized between face.Can the property that should have of phase-change working substance be: boiling point is lower, saturation pressure is higher, viscous
Coefficient is smaller, Prandtl number is lower and chemical property is stablized etc., optional water, ammonia, a chloropentafluoroethane, pentafluoroethane, 1, and 1,
1,2- tetrafluoroethane, two chlorofluoroethanes, 1,1,1- trifluoroethane, difluoromethane, 1,1- Difluoroethane, normal butane, iso-butane, just
Hexane, n-hexane, propane, heptane, octane, nonane, decane or propylene.
Below based on the enclosed traveling wave thermoacoustic prime mover with gas-liquid phase transition, illustrate this further combined with embodiment
The working principle and technical effect of engine.
Embodiment:
The enclosed traveling wave thermoacoustic prime mover specific structure of adjoint gas-liquid phase transition of the invention is as shown in Figure 1, repeat no more.
Working medium used in it is difluoromethane.
When being run with the enclosed traveling wave thermoacoustic prime mover of gas-liquid phase transition, needed first by entire closed type hot phonomotor
System is connected to vacuum pump, is at least vacuumized three times, and the air in removing system is replaced；It is backward vacuumize after thermoacoustic
Engine system injection can phase-change working substance.Due to need to make in system can phase-change working substance be in the original state of gas-liquid two-phase
Under, the gas-phase working medium in system is cooled down using the low-temperature circulating water that constant temperature water tank supplies, is allowed to be condensed into liquid, and protect
Card liquid level is between regenerator 2.Completing can be after the filling of phase-change working substance, and driving heat source is by hot end heat exchanger 1 to system
Heating.Meanwhile low-temperature circulating water is cooling to system by cool end heat exchanger 3.When between hot end heat exchanger 1 and cool end heat exchanger 3
Temperature difference when being more than certain threshold value, since the Sonic heat changing with gas-liquid phase transition having occurred at regenerator 2, can phase-change working substance in heat
Self-oscillation is generated in phonomotor, and thermoacoustic engine is gradually made to reach the state of stable oscillation stationary vibration.At this point, can phase-change working substance it is micro-
Member back and forth movement at regenerator 2 periodically undergoes the heating power of isothermal expansion, isobaric heat release, isotherm compression and isobaric heat absorption
Cyclic process (see Fig. 3), to convert heat energy into sound function.
For the enclosed traveling wave thermoacoustic prime mover system with gas-liquid phase transition, wire mesh, metal are equipped in regenerator 2
The material of silk screen is stainless steel, copper or other hard Heat Conduction Materials.The hydraulic radius of regenerator 2 is much smaller than the heat leak of working medium
Depth, ensure that at regenerator 2 can phase-change working substance infinitesimal and regenerator wire mesh wall surface be in good thermo-contact always, from
And make can the regenerator wire mesh wall surface of phase-change working substance infinitesimal and its position keep isothermal.The hydraulic radius of regenerator with
The ratio between heat penetration of working medium is 0.11~0.46.
For the enclosed traveling wave thermoacoustic prime mover system with gas-liquid phase transition, load pipe 7 and air reservoir 8 are used as phase modulation unit
Side is connected in loop traveling wave thermo-acoustic unit, constitutes closed system.The phonoreception of 7 analogy of load pipe is that (ρ is liquid phase to L=ρ l/A
The density of working medium, l are the length of load pipe, and A is the circulation area of load pipe), by adjusting the length of load pipe 7 or straight
Diameter can effectively adjust phonoreception, and then the phase of regulating system；The acoustic capacitance of 8 analogy of air reservoir is C=V/ γ Pm(V is air reservoir
Volume, γ are the specific heat ratio of gas-phase working medium, PmFor the average pressure of air reservoir), it, can by adjusting the length or diameter of air reservoir 8
Effectively to adjust acoustic capacitance, and then the phase of regulating system.To make regenerator 2 be in traveling-wave phase, load pipe 7 and air reservoir 8
Length ratio is 17~31, and diameter ratio is 0.08~0.15.
Below using under Lagrangian method analysis Traveling wave at regenerator can phase-change working substance infinitesimal experience thermodynamic cycle
Process, and then disclose the working principle of the enclosed traveling wave thermoacoustic prime mover with gas-liquid phase transition.Fig. 2 gives under Traveling wave
At regenerator can phase-change working substance infinitesimal displacement, speed and pressure oscillation figure, wherein pressure with displacement differ 90 degree of phases, pressure
With the same phase of speed.Be expert at wave sound off field, can phase-change working substance infinitesimal reciprocating vibration between regenerator 2, thermodynamic cycle (see Fig. 3)
Specifically include: 1-2 isothermal expansion process, saturation liquid phase working fluid infinitesimal (see Fig. 3 state point 1) are in direct limit position, that is, lean on
Nearly hot end heat exchanger 1, since it is equal with regenerator wire mesh wall surface temperature at this, while pressure reduction causes its vaporization to be gone forward side by side
One step is expanded to overheated gas state (see Fig. 3 state point 2)；2-3 equipressure exothermic process, working medium infinitesimal are moved by direct limit position
It moves to negative sense extreme position, i.e., it is mobile to cool end heat exchanger 3 by regenerator 2 from hot end heat exchanger 1.Because with regenerator metal
The good thermo-contact of silk screen wall surface, superheated vapor phase working medium infinitesimal is under the conditions of equipressure to regenerator wire mesh wall surface heat release, quilt
It is cooled to saturated gas (see Fig. 3 state point 3)；3-4 isotherm compression process, saturation gas-phase working medium infinitesimal are in negative sense limit position
It sets, i.e., close to cool end heat exchanger 3, due to equal with regenerator wire mesh wall surface temperature at this, while pressure rise leads to it
It liquefies and is further compressed to subcooled liquid state (see Fig. 3 state point 4)；4-1 isobaric heat absorption process, working medium infinitesimal is by negative sense pole
Extreme position is moved to direct limit position, i.e., mobile to hot end heat exchanger 1 by regenerator 2 from cool end heat exchanger 3.Also due to
With regenerator wire mesh wall surface is good thermally contacts, supercooled liquid phase working medium infinitesimal is under the conditions of equipressure from regenerator wire mesh
Wall surface heat absorption, is heated to be saturated liquid, returns to state point 1, completes circulation.The circulation is realized absorbs heat from high temperature heat source, to
Low temperature cold source heat release, and then convert heat energy into sound function.
By taking difluoromethane working medium as an example, can calculate under Traveling wave at regenerator 2 can phase-change working substance infinitesimal experience heating power
The performance of circulation.Assuming that it is 50 DEG C that heat source temperature is constant, constant sink temperature is 20 DEG C, it may be determined that the temperature of state point 1 and 3 point
Wei not be 50 DEG C and 20 DEG C, it can determine that the pressure of state point 1 and 3 is respectively 3.1412MPa according to the saturated vapour pressure of difluoromethane
And 1.4746MPa, pressure ratio 2.13.On this basis, in conjunction with equal mild isobaric condition, it may be determined that the parameter of state point 2 and 4.
According to for the energy conservation relation formula for being is closed, the performance of thermodynamic cycle can be calculated.Calculated result shows, unit volume working medium
Acting ability is 937.77kJ/m3(gas density for taking state point 2), the thermal efficiency 8.02%, relative carnot efficiency are
86.37%.
Finally it should be noted that the above-mentioned description to embodiment is for convenient for those skilled in the art's energy
It understands and applies the invention.Person skilled in the art obviously easily can make various modifications to above-described embodiment,
And it applies the general principles described here to other examples without having to go through creative labor.Therefore, the present invention is not
It is limited to above-described embodiment, those skilled in the art's announcement according to the present invention, the improvement made for the present invention and modification are all answered
This is within protection scope of the present invention.
Claims (10)
1. a kind of enclosed traveling wave thermoacoustic prime mover of adjoint gas-liquid phase transition, it is characterised in that: including a loop traveling wave thermoacoustic
Unit and a phase modulation unit；The loop traveling wave thermo-acoustic unit includes hot end heat exchanger (1), regenerator (2), cold end heat exchange
Device (3), U-tube (4), feedback pipe (5) and acoustic capacitance pipe (6), and hot end heat exchanger (1), regenerator (2), cool end heat exchanger (3), U
Shape pipe (4), feedback pipe (5) and acoustic capacitance pipe (6) are circumferentially sequentially connected with and constitute circuit；The phase modulation unit includes load pipe
, and the U-tube (4) of load pipe (7) one end linkloop traveling wave thermo-acoustic unit, the other end and air reservoir (8) phase (7) and air reservoir (8)
Even；Wherein, in loop traveling wave thermo-acoustic unit and phase modulation unit filled with can phase-change working substance, and can phase-change working substance in working condition
Under liquid level be located among regenerator (2).
2. the enclosed traveling wave thermoacoustic prime mover as described in claim 1 with gas-liquid phase transition, it is characterised in that: described returns
Wire mesh is equipped in hot device (2).
3. the enclosed traveling wave thermoacoustic prime mover as claimed in claim 2 with gas-liquid phase transition, it is characterised in that: the gold
The material for belonging to silk screen is stainless steel, copper or other hard Heat Conduction Materials.
4. the enclosed traveling wave thermoacoustic prime mover as described in claim 1 with gas-liquid phase transition, it is characterised in that: described returns
The hydraulic radius of hot device (2) is less than the heat penetration of working medium.
5. the enclosed traveling wave thermoacoustic prime mover as claimed in claim 4 with gas-liquid phase transition, it is characterised in that: described returns
The ratio between the hydraulic radius of hot device (2) and the heat penetration of working medium are 0.11~0.46.
6. the enclosed traveling wave thermoacoustic prime mover as described in claim 1 with gas-liquid phase transition, it is characterised in that: described can
Phase-change working substance is water, ammonia, a chloropentafluoroethane, pentafluoroethane, 1,1,1,2- tetrafluoroethane, two chlorofluoroethanes, 1,1,1- trifluoro
Ethane, difluoromethane, 1,1- Difluoroethane, normal butane, iso-butane, n-hexane, n-hexane, propane, heptane, octane, nonane, the last of the ten Heavenly stems
Alkane or propylene.
7. the enclosed traveling wave thermoacoustic prime mover as claimed in claim 6 with gas-liquid phase transition, it is characterised in that: described can
Phase-change working substance is difluoromethane.
8. the enclosed traveling wave thermoacoustic prime mover as described in claim 1 with gas-liquid phase transition, it is characterised in that: the heat
End heat exchanger (1) is connected with heat source.
9. the enclosed traveling wave thermoacoustic prime mover as described in claim 1 with gas-liquid phase transition, it is characterised in that: described is cold
End heat exchanger (3) is connected with cold source.
10. the enclosed traveling wave thermoacoustic prime mover as described in claim 1 with gas-liquid phase transition, it is characterised in that: described
The length ratio of load pipe (7) and air reservoir (8) is 17~31, and diameter ratio is 0.08~0.15.
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| CN109458315B (en) | 2024-06-11 |
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