CN205753932U - Gas-liquid phase transition thermoacoustic engine drives magnetic fluid electricity generation system - Google Patents
Gas-liquid phase transition thermoacoustic engine drives magnetic fluid electricity generation system Download PDFInfo
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- CN205753932U CN205753932U CN201620478984.9U CN201620478984U CN205753932U CN 205753932 U CN205753932 U CN 205753932U CN 201620478984 U CN201620478984 U CN 201620478984U CN 205753932 U CN205753932 U CN 205753932U
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Abstract
The utility model discloses a kind of gas-liquid phase transition thermoacoustic engine and drive magnetic fluid electricity generation system, including loop thermoacoustic launch device, magnetic fluid, TRT, loop thermoacoustic launch device includes loop pipeline, loop pipeline includes: be in the U-tube of loop duct bottom, magnetic fluid it is filled with in U-tube, it is in the acoustic capacitance pipe of loop conduit upper, it is connected to the feedback pipe between U-tube one side arm and acoustic capacitance pipe one end, it is connected to the heater between the acoustic capacitance pipe other end and another side arm of U-tube in turn, thermal buffer tube, cooler, the gas phase of magnetic fluid it is filled with in the loop pipeline space of magnetic fluid ullage；TRT includes: be wound in the coil of U-tube two-arm, and for providing a pair permanent magnet in magnetic field, two permanent magnets lay respectively at above acoustic capacitance pipe and below U-tube and position is the most corresponding.The coil producing electromotive force is wound in pipeline external, it is to avoid install electrode at pipe interior.
Description
Technical field
This utility model relates to thermo-acoustic technology, particularly relates to a kind of gas-liquid phase transition thermoacoustic engine and drives magnetic
Property fluid power-generation system.
Background technology
Typically our common generating set is generally with internal combustion engine (electromotor such as gasoline engine, diesel engine)
Driving, fossil energy, its noxious emission and the noise of internal combustion engine consumption preciousness in a large number are China cities
The primary pollution source of environment.Increasingly sharpen in energy crisis, fossil energy is petered out, environmental consciousness
In the case of day by day strengthening, energy-saving and cost-reducing, minimizing environmental pollution is must be through approach.
Thermo-acoustic engine can convert heat energy into mechanical energy, or produces temperature difference by mechanical energy, therefore in heat
Can utilize and cryogenic refrigeration aspect is widely used.The internal combustion engine used in a large number from today is different, heat
Acoustic and thermal machine it is not absolutely required to be injected into cylinder interior work by combustion, as long as having with liquid or gaseous fuel
Heat is applied to hot junction and just can work, and therefore can use various heating sources (solar energy, biomass energy, work
Amateurish heat etc.) drive work.Meanwhile, thermoacoustic engine, owing to not having mechanical moving element, runs
Reliably, the life-span long, and general use noble gas as working media, therefore there is higher environmental protection
The features such as characteristic, become study hotspot in recent years.
At present, the existing scheme of thermoacoustic generating includes Thermoacoustic engine linear electric motors, Thermoacoustic engine aluminium alloy
Body working medium magnetohydrodynamic generator and Thermoacoustic engine electrolyte-magnetic field coupled electricity-generation etc., the former is straight for driving
Line electric power generation, rear both of which belongs to driving magnetic fluid cutting magnetic induction line generating.
For drive linear electric motors generating, there is moving component in system, it is difficult to the cylinder avoided completely with
Abrasion between piston, reliability and service life to system have a strong impact on.
For Thermoacoustic engine liquid metal sodium as the magnetohydrodynamic electricity generation system of working medium, due to too small pressure
Contracting, it is necessary under high pressure run.And for Thermoacoustic engine alloy liquid working medium magnetohydrodynamic generator and
Thermoacoustic engine electrolyte-magnetic field coupled electricity-generation, it is all to produce electromotive force at pipe interior, need to be in pipe
Electrode output electric energy is installed in portion, simultaneously as electric current produces in pipe, system there may be electric leakage danger
Danger.
The Chinese patent literature of Publication No. CN104079142A discloses a kind of dual temperature position thermal source and drives
Dynamic thermoacoustic three phase AC power generating system, including hydromagnetic generating device and the Sonic heat changing of composition loop
Device, be filled with in described loop can phase-change working substance, this can phase-change working substance gas-liquid phase transition Sonic heat changing fill
Put middle generation gas-liquid to change, can the gas phase of phase-change working substance as the working medium of traveling wave thermoacoustic engine, can phase
The liquid phase of matter of exchanging work is as the working medium of hydromagnetic generating device；Described hydromagnetic generating device and matching
Sonic heat changing device as a loop unit, described thermoacoustic three phase AC power generating system at least two
Individual loop unit, be interconnected between each loop unit share described can phase-change working substance.
The Chinese patent literature of Publication No. CN101309040A discloses a kind of employing room-temperature ion
The thermoacoustic driving magnetohydrodynamic electricity generation system of liquid.It includes the first loop row ripple thermoacoustic being sequentially connected with
Core, resonatron, ionic liquid at room temperature, TRT and the second loop row ripple thermoacoustic core, the most also wrap
Include the frequency regulator being connected between two row ripple thermoacoustic core.Loop row ripple thermoacoustic core includes being sequentially connected with
Feedback pipe, phonoreception pipe, acoustic capacitance pipe, the first water cooler, regenerator, heater, thermal buffer tube and
Second water cooler.TRT is by rectangle stainless steel outer sleeve, insulating interlayer, permanent magnet, electrode and draws
Wire terminal forms, and the most also includes the ionic liquid at room temperature of rectilinear oscillation.Frequency regulator is adjusted by two bands
The air reservoir of joint valve is connected to row ripple thermoacoustic core by two stop valves.
Prior art is generation electromotive force in pipeline, need to install electrode output electricity at pipe interior
Can, then at electrode contact, there is sealing problem, and there is the danger of electric leakage.
Utility model content
This utility model provides a kind of gas-liquid phase transition thermoacoustic engine and drives magnetic fluid electricity generation system,
Can avoid installing electrode in pipeline, prevent the generation of danger of hazardous electrical discharges.
A kind of gas-liquid phase transition thermoacoustic engine drives magnetic fluid electricity generation system, starts including loop thermoacoustic
Device, magnetic fluid, TRT,
Loop thermoacoustic launch device includes that loop pipeline, loop pipeline include:
It is in the U-tube of loop duct bottom, in U-tube, is filled with magnetic fluid,
It is in the acoustic capacitance pipe of loop conduit upper,
It is connected to the feedback pipe between U-tube one side arm and acoustic capacitance pipe one end,
It is connected to the heater between the acoustic capacitance pipe other end and another side arm of U-tube, heat buffering in turn
Pipe, cooler,
The gas phase of magnetic fluid it is filled with in the loop pipeline space of magnetic fluid ullage；
TRT includes:
It is wound in the coil of U-tube two-arm,
For providing a pair permanent magnet in magnetic field, two permanent magnets lay respectively at above acoustic capacitance pipe and U-tube
Lower section and position are the most corresponding.
Magnetic fluid in this utility model had both been the working medium of TRT, started dress for loop thermoacoustic again
The working medium put, this loop thermoacoustic launch device is substantially gas-liquid phase transition thermoacoustic engine.Loop thermoacoustic is sent out
Magnetic fluid heating is made it evaporate expansion by heater by dynamic device, the cooler gas to magnetic fluid
Carrying out cooling mutually makes it condense compression, and the high temperature evaporation that working medium gas-liquid phase transition produces expands and condensation at low temperature
The effect of compression makes working medium that self-oscillation to occur in loop thermoacoustic engine, is converted into by partial heat
Sound merit exports, and in driving loop pipeline, the liquid level of liquid vibrates between heater and cooler back and forth.
A pair permanent magnet being respectively placed in the upper and lower of system (can also be that the two poles of the earth are respectively placed in system
One piece of arch permanent magnet of upper and lower), produce from the bottom to top the external magnetic field of (or from top to bottom).
The size of the magnetic nano particle in magnetic fluid is the least, to such an extent as to they are some single domains
Magnetic nano particle.Magnetic nano particle is actually magnetic dipole one by one, and magnetic fluid can regard
Set for these little magnetic dipoles.When the effect not having external magnetic field, the magnetic of these little magnetic dipoles
Square direction is disorderly and unsystematic and cancels each other, so total macroscopic moment is zero.The work of outside magnetic field
Under with, these magnetic dipoles arrange along the direction of external magnetic field H, the direction of its magnetization intensity vector M
It is parallel with external magnetic field H and in the same direction.
Under the driving of loop thermoacoustic launch device, magnetic fluid moves back and forth in pipeline, with winding
Coil generation relative motion outside U-tube two-arm, changes the magnetic flux in coil, produces in coil
Raw electromotive force.
Electricity generation system of the present utility model produces electromotive force extracted current in the coil of pipeline external, keeps away
Exempt from, at pipe interior, electrode is installed, thus avoided the sealing problem at electrode contact and can avoid Lou
The generation that electricity is dangerous.
As preferably, loop thermoacoustic launch device includes the first loop thermoacoustic launch device and the second loop
Thermoacoustic launch device, the U-tube of the first loop thermoacoustic launch device and the second loop thermoacoustic launch device
U-tube be connected by resonatron, two loop thermoacoustic launch device share magnetic fluid.
All being filled with magnetic fluid in the U-tube of resonatron and two loop thermoacoustic launch device, system is transported
In row, the liquid level of magnetic fluid moves back and forth between cooler and heater, thermal buffer tube.Pass through
Two loop launch device are connected by resonatron, both can avoid one of them loop intrinsic pressure insist on continuous higher
Or on the low side, make system stable operation, the output of system can be increased again.
As preferably, described magnetic fluid includes magnetic nano particle and carrier fluid.Although magnetic fluid has
Having ferromagnetism, but it is different from ferromagnetic material, when magnetizing, it does not has magnetic hysteresis, and has
Superparamagnetism (i.e. magnetic coercive force is zero).In the range of downfield, magnetic fluid is with constant magnetization
Rate magnetizes, and χ is constant, and magnetization M is directly proportional to magnetic field intensity H；In highfield, magnetization
Reaching saturated back magnetization intensity M is constant.The general expression of the intensity of magnetization is M=χ H.
Magnetic nano particle is the least, so that presenting random Brownian movement in carrier fluid, and this heat
Motion be enough to offset the settlement action of gravity and slacken interparticle magnetic cohesion, at gravity and
Stable existence under magneticaction, does not produce precipitation and cohesion.Magnetic nano particle and carrier fluid are muddy integral,
So that magnetic fluid had both had the magnetic of common magnetic material, there is again the mobility of liquid.
As preferably, described magnetic nano particle is magnetic Fe3O4Nanoparticle, described carrier fluid is third
Ketone or the alcohol of C1～C5, the steam of carrier fluid is as the gas phase of magnetic fluid.
Loop thermoacoustic launch device in this utility model electricity generation system, mainly utilizes the liquid phase of working medium
Change is operated, and can realize " little " temperature difference and run, improve the utilization rate of relatively low-temperature level low-grade energy.
Therefore, the carrier fluid of magnetic fluid, the i.e. working medium of loop thermoacoustic launch device, it should the attribute possessed is:
Under room temperature condition, presenting liquid, the coefficient of viscosity less, boiling point low (beneficially phase transformation), gasification are latent
Heat is less.
Ethanol be colourless transparent liquid, boiling point be 78.32 DEG C, relative density (water=1) 0.7893, glutinous
Degree (20 DEG C) 1.17mpa s, burning-point 363 DEG C, gasification latent heat 41.5kJ/mol, be that one can
Selective carrier fluid.Additionally, methanol boiling point be 64.70 DEG C, relative density (water=1) 0.7913, glutinous
Degree (20 DEG C) 0.5945mpa s, burning-point 470 DEG C, gasification latent heat 37.39kJ/mol, it is possible to make
Selection for carrier fluid.
It is further preferred that described carrier fluid is ethanol.
Magnetic Fe3O4Nanoparticle is generally not readily dispersible in lower boiling organic solvent, in order to increase
Magnetic nano particle dispersibility in carrier fluid, can add surfactant, on surface in magnetic fluid
Under the effect of activating agent, magnetic nano particle stably disperses, with carrier fluid, to form magnetic suspension liquid.Enter
One step is preferred, and described magnetic fluid also includes that surfactant, described surfactant are alkane
In base polyethenoxy ether acetic acid ester, cyanobiphenyl type liquid crystal, cyanophenylcyclohexanes type liquid crystal at least
A kind of.
As preferably, described surfactant is cyanophenylcyclohexanes type liquid crystal, magnetic Fe3O4
Nanoparticle, cyanophenylcyclohexanes type liquid crystal, the mass ratio of ethanol are 3～7: 1: 1.8～12；Further
Preferably, magnetic Fe3O4Nanoparticle, cyanophenylcyclohexanes type liquid crystal, the mass ratio of ethanol are
6∶1∶10。
Under this proportioning, in magnetic fluid, magnetic nano particle dispersibility is preferable, the energy of magnetization of magnetic fluid
Power is strong.
As preferably, described cyanobiphenyl type liquid crystal is 4 '-amyl group [1,1 '-biphenyl]-4-formonitrile HCN, described
Cyanophenylcyclohexanes type liquid crystal be 4-(4-propylcyclohexyl) benzonitrile, 4-(4-pentylcyclohexyl)
At least one in benzonitrile, 4-(4-heptyl cyclohexyl) benzonitrile.
It is further preferred that with molar percent, the group of described cyanophenylcyclohexanes type liquid crystal
Become:
4-(4-propylcyclohexyl) benzonitrile 10%～40%
4-(4-pentylcyclohexyl) benzonitrile 20%～60%
4-(4-heptyl cyclohexyl) benzonitrile 10%～40%
The preparation method of magnetic fluid of the present utility model can be prior art (list of references:
T.Fujita, T.Miyazaki.Preparation and properties of low boiling point of
alcohol and acetone-based magnetic fluid.Journal of Magnetism and M
Agnetic Materials, 1999,201 (0), 14-17).
Work under the effect of loop thermoacoustic launch device outside magnetic field of the present utility model, and routine is not
Rust Steel material has ferromagnetism, if the loop pipeline material of loop thermoacoustic launch device uses conventional stainless
Steel, during system is run, magnetic fluid moves back and forth in pipeline, magnetic Fe therein3O4
Nanoparticle may be sticked on inner-walls of duct by magneticaction.So, as preferably, described
The loop pipeline material of loop thermoacoustic launch device is austenitic stainless steel.
Austenitic stainless steel, refers to the rustless steel at normal temperatures with austenite structure.Containing Cr in steel
About 18%, when Ni 8%～10%, C about 0.1%, there is stable austenite structure.Austenite
(Austenite) being also referred to as austenite or γ-Fe, be a kind of microscopic structure of iron and steel, austenite is not
There is ferromagnetism, be that a kind of plasticity is fine, the solid solution that intensity is relatively low, and there is certain toughness.Pipe
Wall uses austenitic stainless steel to be the spatial distribution that non-magnet material does not affect magnetic field, thus without externally
Magnetic fields.
Compared with prior art, the beneficial effects of the utility model are:
1, the coil producing electromotive force is wound in pipeline external, from managing extracted current, it is to avoid manage
The internally installed electrode in road, thus avoid the sealing problem at electrode contact and danger of hazardous electrical discharges can be avoided
Occur；
2, gas-liquid phase transition thermoacoustic engine drive system is utilized to generate electricity, gas-liquid phase transition thermoacoustic engine
The driving temperature difference is little, and available low-grade energy is driven, and improves the utilization rate of low-grade energy；
3, thermoacoustic engine exists magnetic fluid and can block gas channels as liquid piston, can
Avoid row ripple loop problem, the problem includes: sound direct current problem.
Accompanying drawing explanation
Fig. 1 is the structure that this utility model gas-liquid phase transition thermoacoustic engine drives magnetic fluid electricity generation system
Schematic diagram.
In figure: 1, cooler, 2, thermal buffer tube, 3, heater, 4, acoustic capacitance pipe, 5, feedback
Pipe, 6, magnetic fluid, 7, U-tube, 8, resonatron, 9, permanent magnet, 10, coil.
Detailed description of the invention
As it is shown in figure 1, a kind of gas-liquid phase transition thermoacoustic engine of the present utility model drives magnetic fluid to send out
Electricity system includes loop thermoacoustic launch device, magnetic fluid 6, TRT.
Loop thermoacoustic launch device includes the first loop thermoacoustic launch device and being symmetrical set
Second Ring Road thermoacoustic launch device.
Two loop thermoacoustic launch device by U-tube 7, acoustic capacitance pipe 4, feedback pipe 5, heater 3,
Thermal buffer tube 2, cooler 1 connect into a loop pipeline.Concrete, U-tube 7 is positioned at loop tube
The bottom in road, is wherein filled with magnetic fluid 6, and acoustic capacitance pipe 4 is positioned at the top of loop pipeline, feedback pipe
One side arm of one end and the U-tube 7 of 5 connection acoustic capacitance pipes 4, heater 3, thermal buffer tube 2, cold
But device 1 is sequentially connected with, the other end of connection acoustic capacitance pipe 4 and another side arm of U-tube 7.Magnetic flow
The loop pipeline space of body 6 ullage is filled with the gas phase of magnetic fluid 6.
The U-tube 7 of the first loop thermoacoustic launch device and the U-shaped of the second loop thermoacoustic launch device
Pipe 7 is connected by resonatron 8, and two loop thermoacoustic launch device are symmetrical arranged and share magnetic fluid 6.
TRT includes: is wound in the coil 10 of two U-tube 7 two-arm, is used for producing electromotive force
And extracted current, also including a pair permanent magnet 9 for providing magnetic field, two permanent magnets 9 lay respectively at
Above acoustic capacitance pipe 4 and below U-tube 7 and position correspondence up and down (can also be the permanent magnet of an arch,
The two poles of the earth of this permanent magnet are respectively placed in below top and the U-tube 7 of acoustic capacitance pipe 4).It is positioned at upper and lower
The N pole of two permanent magnets 9 of side simultaneously the most down or upward, forms vertical outer magnetic between permanent magnet 9
?.
This utility model gas-liquid phase transition thermoacoustic engine drives the pipeline material of magnetic fluid electricity generation system
All using austenitic stainless steel, austenite does not have ferromagnetism, is that a kind of plasticity is fine, and intensity is relatively low
Solid solution, and there is certain toughness.Tube wall uses austenitic stainless steel to be that non-magnet material does not affects
The spatial distribution in magnetic field, produces impact thus without external magnetic field.
Magnetic fluid 6 is magnetic Fe3O4Nanoparticle is suspended in the magnetic suspension liquid formed in ethanol,
Its concrete preparation method can be prior art (list of references:
T.Fujita, T.Miyazaki.Preparation and properties of low boiling point of
alcohol and acetone-based magnetic fluid.Journal of Magnetism and M
Agnetic Materials, 1999,201 (0), 14-17).
Concrete preparation method is:
(1) by magnetic Fe3O4Nanoparticle is dispersed in alkyl-polyoxyethylene ether acetate, at 363K
Lower high-temperature heating, adds sulphuric acid, and filtration, dried alcohol flushing fall unnecessary surfactant,
Surface must be arrived and be coated with the magnetic particle of surfactant；
(2) magnetic particle that above-mentioned surface is coated with surfactant is dispersed in cyanophenyl cyclohexanes
In alkane type liquid crystal, surface must be arrived and be coated with the magnetic particle of double-layer surface-active agent, with molar percent,
Consisting of of cyanophenylcyclohexanes type liquid crystal:
4-(4-propylcyclohexyl) benzonitrile 30%
4-(4-pentylcyclohexyl) benzonitrile 40%
4-(4-heptyl cyclohexyl) benzonitrile 30%
(3) the magnetic particle that surface is coated with double-layer surface-active agent is distributed in ethanol, centrifugal place
Magnetic fluid is obtained after reason.
In above-mentioned preparation method, magnetic Fe3O4Nanoparticle, cyanophenylcyclohexanes type liquid crystal, ethanol
Mass ratio be 6: 1: 10.
Before operation of electric power system, fill carrying out magnetic fluid 6 after system evacuation, initial fill liquid
Face is higher than heater 3.When system is run, heater 3 heats, and cooler cools down and begins
It is maintained at room temperature eventually.
Magnetic fluid 6 heating is made ethanol evaporation expand by heater 3 by loop thermoacoustic launch device,
Cooler 1 carries out cooling to alcohol vapor makes it condense compression, and the high temperature evaporation that gas-liquid phase transition produces is swollen
Swollen and condensation at low temperature compression effect makes magnetic fluid 6 occur from exciting in loop thermoacoustic engine
Swinging, partial heat is converted into the output of sound merit, in driving loop pipeline, the liquid level of magnetic fluid 6 is adding
Move back and forth between hot device 3 and cooler 1.
Magnetic Fe in magnetic fluid 63O4Magnetizing under the effect of nanoparticle outside magnetic field, its magnetization is strong
The direction of degree vector M is parallel with external magnetic field H and in the same direction.Magnetic fluid 6 is reciprocal in pipeline
, there is relative motion with the coil 10 being wrapped in outside U-tube 7 two-arm in motion, changes coil 10
Interior magnetic flux, produces electromotive force in coil 10.
Claims (6)
1. a gas-liquid phase transition thermoacoustic engine drives magnetic fluid electricity generation system, it is characterised in that
Including loop thermoacoustic launch device, magnetic fluid, TRT,
Loop thermoacoustic launch device includes that loop pipeline, loop pipeline include:
It is in the U-tube of loop duct bottom, in U-tube, is filled with magnetic fluid,
It is in the acoustic capacitance pipe of loop conduit upper,
It is connected to the feedback pipe between U-tube one side arm and acoustic capacitance pipe one end,
It is connected to the heater between the acoustic capacitance pipe other end and another side arm of U-tube, heat buffering in turn
Pipe, cooler,
The gas phase of magnetic fluid it is filled with in the loop pipeline space of magnetic fluid ullage；
TRT includes:
It is wound in the coil of U-tube two-arm,
For providing a pair permanent magnet in magnetic field, two permanent magnets lay respectively at above acoustic capacitance pipe and U-tube
Lower section and position are the most corresponding.
Gas-liquid phase transition thermoacoustic engine the most according to claim 1 drives magnetic fluid to generate electricity
System, it is characterised in that loop thermoacoustic launch device includes the first loop thermoacoustic launch device and the second ring
Road thermoacoustic launch device, the U-tube of the first loop thermoacoustic launch device and the second loop thermoacoustic start dress
The U-tube put is connected by resonatron, and two loop thermoacoustic launch device share magnetic fluid.
Gas-liquid phase transition thermoacoustic engine the most according to claim 1 drives magnetic fluid to generate electricity
System, it is characterised in that described magnetic fluid includes magnetic nano particle and carrier fluid.
Gas-liquid phase transition thermoacoustic engine the most according to claim 3 drives magnetic fluid to generate electricity
System, it is characterised in that described magnetic nano particle is magnetic Fe3O4Nanoparticle, described carrier fluid is
Acetone or the alcohol of C1～C5, the steam of carrier fluid is as the gas phase of magnetic fluid.
Gas-liquid phase transition thermoacoustic engine the most according to claim 4 drives magnetic fluid to generate electricity
System, it is characterised in that described carrier fluid is ethanol.
Gas-liquid phase transition thermoacoustic engine the most according to claim 1 drives magnetic fluid to generate electricity
System, it is characterised in that the loop pipeline material of described loop thermoacoustic launch device is austenite stainless
Steel.
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| CN201620478984.9U CN205753932U (en) | 2016-05-24 | 2016-05-24 | Gas-liquid phase transition thermoacoustic engine drives magnetic fluid electricity generation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871172A (en) * | 2016-05-24 | 2016-08-17 | 浙江大学 | Magnetic fluid power generation system driven by gas-liquid phase change thermoacoustic engine |
| CN108711961A (en) * | 2018-05-28 | 2018-10-26 | 中国农业大学 | Electromagnetic pump |
-
2016
- 2016-05-24 CN CN201620478984.9U patent/CN205753932U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871172A (en) * | 2016-05-24 | 2016-08-17 | 浙江大学 | Magnetic fluid power generation system driven by gas-liquid phase change thermoacoustic engine |
| CN108711961A (en) * | 2018-05-28 | 2018-10-26 | 中国农业大学 | Electromagnetic pump |
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