JP2016183655A - Thermoacoustic equipment and vaporizer including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide thermoacoustic equipment and a vaporizer including the same, capable of being miniaturized as a whole and improving energy conversion efficiency per a unit volume.SOLUTION: In a resonance portion where acoustic wave resonates at a part excluding a part where motors 10a and 10b and a power generator 40 are disposed in an acoustic cylinder C, a working medium cooling mechanism 30 is disposed to cool a working medium inside of the resonance portion, in a form of circulating a low-temperature refrigerant CW supplied from the external near the resonance portion to exchange heat with the working medium. With respect to one of thermoacoustic engines, a low-temperature refrigerant circulation flow channel 20 is disposed to make the low-temperature refrigerant supplied from the external, exchange heat with the working medium in a cooler, and then makes the same exchange heat with the working medium in the working medium cooling mechanism.SELECTED DRAWING: Figure 1

Description

  The present invention provides an acoustic cylinder in which a working medium is filled and a sound wave is propagated between a heater for heating the working medium from the outside, a cooler for cooling the working medium from the outside, the heater, and the cooler. A thermoacoustic facility having at least one prime mover comprising a regenerator for amplifying sound waves, and having at least one thermoacoustic engine having a power generator for generating electric power from vibrations of the sound waves, and the same Related to the carburetor.

2. Description of the Related Art Conventionally, a thermoacoustic engine is known as one that converts thermal energy held by heat media having different temperatures into vibration energy of sound waves (see Patent Document 1).
Such a thermoacoustic engine includes, for example, an acoustic cylinder filled with a working medium such as helium and through which sound waves propagate, a heater that heats the working medium from the outside, a cooler that cools the working medium from the outside, a heater, and cooling And at least one prime mover comprising a regenerator for amplifying the vibration energy of the sound wave between them.

  Thus, the vibration energy of the sound wave amplified inside the acoustic cylinder is, for example, as shown in Patent Document 2, a wave receiving member (vibration member) that receives the sound wave, a magnet fixed to the wave receiving member, It is taken out in the form of being converted into electric energy by a generator composed of an inductance coil or the like arranged around the magnet.

  In a thermoacoustic engine, for example, as shown in Patent Document 3, a regenerator includes a cylindrical body that fills the internal space of the acoustic cylinder along the axial direction of the acoustic cylinder. A plurality of through holes having a through shaft along the cylinder axis direction of the tube are provided.

JP 2013-096387 A JP 2005-180396 A Japanese Patent No. 5616287

  In the thermoacoustic engines disclosed in Patent Documents 1 to 3, downsizing the whole is an issue, and energy conversion efficiency per unit volume can be increased by downsizing. Here, the volume of the thermoacoustic engine greatly depends on the length of the acoustic cylinder, and as shown in Patent Document 3, one parameter that determines the length of the acoustic cylinder propagates inside the acoustic cylinder. The wavelength of the sound wave depends on the opening diameter of the through hole of the regenerator.

On the other hand, the opening diameter of the through hole is one parameter of the amplification factor of the vibration energy of the sound wave of the thermoacoustic engine, and the opening diameter is determined so as to increase the amplification factor of the vibration energy of the sound wave. The Therefore, the opening diameter of the through hole could not be determined only for reducing the wavelength of the sound wave and shortening the length of the acoustic cylinder.
Because of the situation as described above, the current thermoacoustic engine has room for improvement from the viewpoint of increasing the energy conversion efficiency per unit volume while reducing the overall size.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to reduce the overall size and improve the energy conversion efficiency per unit volume, and a carburetor including the thermoacoustic equipment. Is to provide

In order to achieve the above object, a thermoacoustic apparatus includes a heater for heating the working medium from the outside, a cooler for cooling the working medium from the outside, and the heater in an acoustic cylinder filled with the working medium and transmitting sound waves. And at least one prime mover comprising a regenerator for amplifying sound waves between the heat exchanger and the cooler, and at least one thermoacoustic engine having a power generator for generating electric power from vibration of sound waves. It is an audio equipment, and its characteristic configuration is
The cooler is configured to exchange heat between a low-temperature refrigerant supplied from the outside and the working medium inside the acoustic cylinder,
In the resonance part where the acoustic wave resonates in a portion other than the part where the prime mover and the power generator are provided in the acoustic cylinder, a low-temperature refrigerant supplied from the outside is caused to flow in the vicinity of the resonance part and the working medium and heat In the form of replacement, a working medium cooling mechanism for cooling the working medium inside the resonance unit is provided,
A low-temperature refrigerant flow path in which a low-temperature refrigerant supplied from outside is exchanged heat with the working medium by the cooler and then exchanged heat with the working medium by the working medium cooling mechanism. Is in the point provided.

According to the above characteristic configuration, since a low-temperature refrigerant is used as a refrigerant as a cooling heat source led to the cooler of the thermoacoustic engine, for example, a heating medium that holds exhaust heat from a cogeneration system or the like is supplied to the heater. By supplying, the temperature difference between the low temperature side temperature in the cooler and the high temperature side temperature in the heater can be sufficiently increased, and the vibration energy of the sound wave can be favorably amplified in the regenerator.
Furthermore, in the above-described characteristic configuration, the working medium cooling mechanism that cools the working medium inside the resonance unit and that supplies the working medium cooling mechanism with the low-temperature refrigerant after passing through the cooler of the prime mover. Since the flow path is provided, the working medium of the resonance unit is cooled by using the cold heat of the remaining low-temperature refrigerant used to amplify the vibration energy of the sound wave, and the following relational expression [Formula 1] is satisfied. In the form, the wavelength of the sound wave propagating through the working medium can be shortened.

In a thermoacoustic engine, when the product ωτ of the thermal relaxation time τ and the angular frequency ω determined by the physical properties of the working medium, the pressure, and the flow path diameter of the regenerator is about 0.1 to 3.0, the regenerator The sound wave is amplified. The thermoacoustic engine oscillates when the acoustic cylinder is long enough to cause resonance at a frequency satisfying the above conditions. Since the oscillating frequency is limited by the above conditions, it is necessary to shorten the wavelength when the acoustic cylinder is downsized.
Therefore, in the present invention, by cooling the working medium in the resonance part of the acoustic cylinder, the sound velocity C is reduced according to the above [Equation 1], and the wavelength of the sound wave is shortened, thereby shortening the cylinder length. -ing
As a result, it is possible to provide a thermoacoustic facility capable of increasing the energy conversion efficiency per unit volume while shortening the length of the acoustic cylinder and reducing the overall size.

Further features of thermoacoustic equipment
The working medium cooling mechanism is composed of a low-temperature refrigerant flow fluid in which an outer surface is provided in close contact with an outer peripheral surface of the acoustic cylinder that allows a low-temperature refrigerant to flow inside and acts as the resonance portion.

For example, when LNG is used as the low-temperature refrigerant, the initial supply temperature is about −160 ° C., and when the LNG flows through the inside of a pipe or the like disposed in the air, frosting is formed on the outer surface of the pipe. May occur.
According to the above characteristic configuration, the low-temperature refrigerant flow through which the low-temperature refrigerant flows is provided in a form in which the outer surface is in close contact with the outer peripheral surface of the acoustic cylinder serving as the resonance portion. It is possible to prevent the frost from being generated during this period, and to favorably exchange heat between the low-temperature refrigerant flowing through the low-temperature refrigerant flow fluid and the working medium in the acoustic cylinder. As a result, the acoustic cylinder can be configured to be short by appropriately cooling the working medium and shortening the wavelength of the sound wave propagating through the working medium.

Further features of thermoacoustic equipment
The low-temperature refrigerant flow fluid is composed of an outer cylinder that hermetically surrounds the acoustic cylinder serving as the resonance section, and allows the low-temperature refrigerant to flow between the acoustic cylinder serving as the resonance section. The working medium is cooled in the form.

According to the above characteristic configuration, since the working medium can be cooled in a form in which the low-temperature refrigerant is brought into direct contact with the outer peripheral surface of the acoustic cylinder serving as the resonance portion, the cooling efficiency of the working medium can be increased.
As a result, the acoustic cylinder can be shortened by cooling the working medium more efficiently and shortening the wavelength of the sound wave propagating through the working medium.

Further features of thermoacoustic equipment
In the direction of the axis of the acoustic cylinder, the end of the portion where the heater is provided and the end of the low-temperature refrigerant flow as the working medium cooling mechanism are cooled by the low-temperature refrigerant flow. Is provided to be separated by a cooling suppression distance that suppresses reaching the heater.

  According to the above characteristic configuration, in the direction of the axis of the acoustic cylinder, the portion where the heater is provided and the end of the low-temperature refrigerant flow as the working medium cooling mechanism are cooled by the low-temperature refrigerant flow. Since the cooling suppression distance that suppresses the effect from reaching the heater is provided apart, for example, it is possible to suppress a reduction in the effect of heating the working medium in the heater due to the cold heat of the low-temperature refrigerant. Thereby, even if it is a case where the structure which cools the acoustic cylinder which functions as a resonance part with a low-temperature refrigerant | coolant is employ | adopted, it can prevent that the amplification effect of the vibration energy of the sound wave in a motor is reduced.

Further features of thermoacoustic equipment
Inside the acoustic cylinder serving as the resonance portion, in the axial direction of the cylinder of the acoustic cylinder, an end of a portion where the heater is provided, and the low-temperature refrigerant flow fluid as the working medium cooling mechanism A flow suppression mechanism that suppresses the flow of the working medium is provided in a region where the regenerator is not provided between the end portions.

According to the above characteristic configuration, the flow suppressing mechanism that suppresses the flow of the working medium includes the end of the portion where the heater is provided and the end of the low-temperature refrigerant flow as the working medium cooling mechanism in the cylindrical axis direction. The working medium cooled by the low-temperature refrigerant flow is suppressed from moving to the part where the heater is provided, because the regenerator is provided in a region where the regenerator is not provided. It can prevent that the effect of the heating by a heater falls.
As a result, it is possible to prevent the amplification effect of the vibration energy of sound waves in the heat source device from being reduced.

Further features of thermoacoustic equipment
The outer diameter portion of the acoustic cylinder has an outer shape along the cylinder outer peripheral portion of the portion where the regenerator is provided in the direction of the axis of the acoustic cylinder and having a diameter larger than the cylinder diameter of the acoustic cylinder. The annular heat insulating member is provided.

The cooler of the thermoacoustic equipment described so far adopts a configuration in which a low-temperature refrigerant is introduced as a refrigerant. However, when LNG (initial introduction temperature is about −60 ° C.) is used as the low-temperature refrigerant, the configuration is appropriate. In some cases, the water vapor contained in the outside air is cooled and solidified around the cooler to form frost.
The frost formed in this way is preferable in the vicinity of the cooler because it exerts an effect of preventing the cold heat of the low-temperature refrigerant from radiating to the atmosphere. Then, there is a risk of taking away the heat of the heater.
Therefore, in the above-described characteristic configuration, by providing an annular heat insulating member that has an outer shape that is larger in diameter than the diameter of the acoustic cylinder along the cylinder outer peripheral portion of the portion where the regenerator of the acoustic cylinder is provided. The frost formed around the cooler can be prevented from spreading to the heater side, and it can be well prevented that the frost is formed around the heater and the heat of the heater is taken away by the frost.

Further features of thermoacoustic equipment
A plurality of the thermoacoustic engines are provided,
The low-temperature refrigerant flow path guides the low-temperature refrigerant to all the coolers of the thermoacoustic engine and exchanges heat with the working medium, and then guides the low-temperature refrigerant to the working medium cooling mechanism to heat the working medium and heat. It exists in the point arrange | positioned so that it may replace | exchange.

According to the above characteristic configuration, the low-temperature refrigerant flow path is disposed so as to guide the low-temperature refrigerant to the working medium cooling mechanism after introducing the low-temperature refrigerant to all the coolers of the thermoacoustic engine. By using low-temperature low-temperature refrigerant that is useful in thermoacoustic engines, the temperature difference between the low-temperature working medium in the cooler and the high-temperature working medium in the heater is sufficiently large. Thus, heat energy can be efficiently extracted as vibration energy of sound waves.
Furthermore, among the cold heat of the low-temperature refrigerant, it is a relatively high-temperature low-temperature refrigerant that is less useful as a thermoacoustic engine, and is located in an acoustic cylinder that acts as a resonance part by the working medium cooling mechanism. Since the working medium to be cooled is cooled, the thermal acoustic engine can be miniaturized and the space can be saved by effectively using the cold heat of a relatively high temperature low-temperature refrigerant that is less useful as a thermoacoustic engine.

Further features of thermoacoustic equipment
A plurality of the prime movers are provided in one thermoacoustic engine,
The low-temperature refrigerant flow path is composed of a low-temperature refrigerant flow main pipe through which the low-temperature refrigerant flows upstream and a plurality of low-temperature refrigerant branch branches branched from the low-temperature refrigerant flow main pipe.
Each of the low-temperature refrigerant branch branches is arranged in one-to-one correspondence with each of the coolers of the prime mover.

  According to the above characteristic configuration, the low-temperature refrigerant branching branch is arranged in a one-to-one correspondence with each of the plurality of prime mover coolers provided in one thermoacoustic engine, and therefore substantially equal to each of the plurality of coolers. A low-temperature refrigerant can be guided at a low temperature. Accordingly, for example, if a configuration in which a heat medium having substantially the same temperature is guided to the plurality of heaters is employed, the vibration energy of the sound wave can be efficiently amplified with a substantially equal temperature difference between the plurality of prime movers.

The characteristic configuration of the vaporizer equipped with the thermoacoustic equipment described so far is
A heating heat exchanger that heats the low-temperature refrigerant, a direct expansion turbine that directly expands the low-temperature refrigerant heated by the heating heat exchanger, and a generator that is rotationally driven by the direct expansion turbine. An expansion channel,
The low-temperature refrigerant flow path is disposed so as to guide the low-temperature refrigerant to the direct expansion flow path after passing through the cooler and the working medium cooling mechanism of the prime mover.

The low-temperature refrigerant guided to the thermoacoustic equipment may be insufficiently vaporized only by heat exchange with the working medium of the thermoacoustic engine.
According to the above characteristic configuration, the direct expansion turbine is rotated by the remaining cold energy held by the low-temperature refrigerant after being guided to the thermoacoustic engine, and the generator is rotationally driven by the direct expansion turbine to obtain electric power. Therefore, it is possible to realize a vaporizer that can recover even a relatively high temperature energy among the cooling energy held by the low-temperature refrigerant and can vaporize LNG well.

Schematic configuration diagram of thermoacoustic equipment according to an embodiment Schematic configuration diagram of thermoacoustic equipment according to another embodiment

The thermoacoustic equipment 100 which concerns on embodiment is related with what can reduce the whole size and can raise the energy conversion efficiency per unit volume.
As shown in FIG. 1, the thermoacoustic equipment 100 includes a cylindrical acoustic cylinder C formed of a loop tube that is filled with a working medium and propagates sound waves, heaters 11 a and 11 b that heat the working medium from the outside, At least one prime mover 10a, 10b comprising coolers 12a, 12b for cooling the medium from the outside and regenerators 13a, 13b for amplifying sound waves between the coolers 12a, 12b and the heaters 11a, 11b. (Two in this embodiment) and a power generator 40 that generates power from vibration of sound waves.

  As shown in FIG. 1, the acoustic cylinder C has a pair of straight tubular parts, and each of the pair of prime movers 10 a and 10 b is provided one for each of the pair of straight tubular parts. In the present embodiment, the pair of prime movers 10a and 10b is disposed at a position where the distance between the two prime movers 10a and 10b is the longest in the axial direction of the acoustic cylinder C.

  Although detailed illustration is omitted, the heaters 11a and 11b include a jacket portion (not shown) through which a second heat medium HW (for example, engine cooling water) guided from the outside and having heat is passed, and the jacket portion. To the inside of the acoustic cylinder C (not shown). The heaters 11a and 11b are heated by the second heat medium HW in which the fins flow through the jacket portion, and heat the working fluid in a form in which the heat is conducted from the fins to the working fluid inside the acoustic cylinder C.

  Similarly, the coolers 12a and 12b include a first heat medium CW (an example of a low-temperature refrigerant: LNG in this embodiment) that has cold heat guided from the outside, and a jacket portion (not shown) that flows through the jacket. And a fin (not shown) extending from the portion to the inside of the acoustic cylinder C. The coolers 12a and 12b are cooled by the first heat medium CW in which the fins flow through the jacket portion, and the working fluid is cooled in such a manner that cold heat is conducted from the fins to the working fluid inside the acoustic cylinder C. .

The regenerators 13a and 13b provided between the heaters 11a and 11b and the coolers 12a and 12b are, for example, in a state where the plate surface is aligned in a direction orthogonal to the cylinder axis direction of the acoustic cylinder C. A plurality of thin plate-like members (not shown) are arranged along the axial direction.
For example, the thin plate member has a thickness of 50 μm or more and 100 μm or less, and is provided with about 300 to 600 sheets. The thin plate-like member is provided with a large number of through holes (not shown) penetrating in a direction along the cylinder axis direction with a diameter of about 200 μm to 300 μm.

The working fluid exists inside the acoustic cylinder C in a state in which minute fluctuations are generated in the cylinder axis direction. In other words, the working fluid forms a traveling wave from one side to the other side and a traveling wave from the other side to the one side between the heaters 11a and 11b and the coolers 12a and 12b. Swaying.
When the working fluid forms a traveling wave from the coolers 12a and 12b to the heaters 11a and 11b, the working fluid has a plurality of through holes in the thin plate members as the regenerators 13a and 13b in the vicinity of the heaters 11a and 11b. While passing through, it is heated in contact with the inner wall of the through hole, and is expanded by being directly heated by the fins of the heaters 11a and 11b. On the other hand, when the working fluid forms a traveling wave from the heaters 11a and 11b to the coolers 12a and 12b, a plurality of thin plate members as the regenerators 13a and 13b in the vicinity of the coolers 12a and 12b. When passing through the through-hole, it cools in contact with the inner wall of the through-hole, and shrinks by being directly cooled by the fins of the coolers 12a and 12b.
Thereby, the sound energy as the traveling wave causes self-excited vibration, and the thermal energy is converted into the vibration energy of the sound wave in such a form that the vibration energy is amplified.

  The working medium can be composed of air composed of oxygen, nitrogen, or the like. Here, since it is desirable that heat exchange in the regenerators 13a and 13b be performed quickly, helium and hydrogen having a high thermal diffusion coefficient are desirable as the working medium. For the purpose of power generation, since a gas having a high molecular weight is desirable, a gas such as argon may be mixed. In this embodiment, helium is used as the working medium because it is thermally stable.

As described above, the vibration energy of the sound wave amplified by the prime movers 10a and 10b is converted into power in the acoustic cylinder C by the power generator 40 that generates power from the vibration of the sound wave.
As shown in FIG. 1, the electric power generator 40 includes a single rotor blade 40 c and a pair of fixed blades 40 a and 40 b provided in a state of sandwiching the rotor blade 40 c inside the acoustic cylinder C. . In this configuration, the rotary blade 40c generates rotational force by both the sound wave swirled by the one fixed blade 40a and heading toward the rotor blade 40c and the sound wave swirled by the other fixed blade 40b and headed toward the rotary blade 40c. The pair of fixed wings 40a and 40b are provided so that the rotation direction of the rotational force applied to the rotary wing 40c by the sound wave swirled by both is the same direction.
Further, the rotor blade 40c is provided with a rotor (not shown) as an induction generator, and at the portion where the rotor blade 40c is provided in the cylinder axis direction of the acoustic cylinder C, the acoustic cylinder C is outside the cylinder. A stator 40d as an induction generator is provided in the diameter portion, and an induced electromotive force E is generated by a coil as the stator 40d when the rotor rotates together with the rotor blades 40c.
By adopting the configuration, the vibration energy of the sound wave generated inside the acoustic cylinder C is converted into electric energy.

  Further, in the pair of prime movers 10a and 10b, the amplification factor of the vibration energy of the sound wave is different from that of the second heat medium HW guided to the heaters 11a and 11b and the first heat medium CW guided to the coolers 12a and 12b. The larger the value, the larger. Therefore, in the present invention, in particular, as the first heating medium CW, an initial introduction temperature of about 162 ° C. is used as a low temperature LNG before being stored in the LNG satellite base and vaporized to NG (natural gas). LNG).

Here, in the thermoacoustic equipment 100, the cylinder length of the acoustic cylinder C is set to the diameter of the through holes of the regenerators 13a and 13b so as to maintain the amplification factor of the vibration energy of the sound waves in the prime movers 10a and 10b at a predetermined level or more. It depends on the wavelength of the sound wave that is self-excited in the acoustic cylinder C in a dependent form. For example, when helium is used as the working medium, when the in-cylinder pressure is 1 MPa and the in-cylinder temperature is 20 ° C., the cylinder length of the acoustic cylinder C is about 7 m.
In addition, since the volume of the thermoacoustic equipment 100 depends on the cylinder axis length of the acoustic cylinder C, the whole is reduced in size and energy conversion efficiency per unit volume (conversion from heat to vibration energy of sound waves) From the viewpoint of increasing efficiency, it is preferable to shorten the length of the acoustic cylinder C.
On the other hand, the LNG as the first heat medium CW after passing through the coolers 12a and 12b of the prime movers 10a and 10b depends on the heat exchange amount in the coolers 12a and 12b, but the operation inside the acoustic cylinder C The temperature is sufficiently lower than the temperature of the fluid.
Therefore, in this embodiment, the working fluid filled in the acoustic cylinder C is cooled by the first heat medium CW after passing through the coolers 12a and 12b, so The wavelength of the excited acoustic wave is shortened, and the length of the acoustic cylinder C is shortened to reduce the size.
Here, the temperature of the working medium and the sound velocity of the sound wave propagating through the working medium have the relationship shown in the following [Equation 1].

When the explanation is added, LNG as the first heat medium CW is passed through the vicinity of the resonance part in the resonance part where the sound wave resonates in the acoustic cylinder C other than the part where the prime movers 10a and 10b and the power generator 40 are provided. A working medium cooling mechanism is provided that cools the working medium inside the resonance section in a form in which heat is exchanged with the working medium.
More specifically, as shown in FIG. 1, the working medium cooling mechanism includes an outer cylinder 30 that hermetically surrounds an acoustic cylinder that functions as a resonance part, and an acoustic cylinder C that functions as a resonance part. The working medium is cooled in such a manner that the first heating medium CW (LNG) flows through the first heating medium.

With the above configuration, the working medium inside the acoustic cylinder C is cooled satisfactorily, but from the viewpoint of increasing the amplification factor of the vibration energy of the sound waves in the prime movers 10a and 10b, the heaters 11a and 11b. The temperature of the working medium in the vicinity of is preferably high.
Therefore, in this embodiment, in the direction of the cylinder axis of the acoustic cylinder C, an end portion of a portion where the heaters 11a and 11b are provided and an outer cylinder 30 as a working medium cooling mechanism are provided. It is separated from the end of the part by a cooling suppression distance (a distance indicated by L in FIG. 1) that suppresses the cooling effect of the working medium by the surrounding cylinder 30 from reaching the working medium heated by the heaters 11a and 11b. Provided.
The cooling suppression distance is preferably small from the viewpoint of increasing the degree of cooling of the working fluid in the resonance section, and is preferably large from the viewpoint of increasing the degree of heating of the working fluid by the heaters 11a and 11b. It is set to an appropriate distance that can balance both.

Further, inside the acoustic cylinder C, an end portion of a portion where the heaters 11a and 11b are provided in the direction of the cylinder axis of the acoustic cylinder C and an outer cylinder 30 as a working medium cooling mechanism are provided. A blocking wall 50 (an example of a flow suppression mechanism) that airtightly partitions the internal space of the acoustic cylinder C and prevents the flow of the working fluid is provided between the end of the portion that is located.
This prevents the diffusion of cold heat from the working fluid cooled by the enclosure 30 as the working medium cooling mechanism to the working fluid heated by the heaters 11a and 11b, and at the heaters 11a and 11b. The diffusion of warm heat from the heated working fluid to the working fluid cooled by the envelope 30 as the working medium cooling mechanism is prevented.
The blocking wall 50 is preferably provided in a state in which the propagation of sound wave vibration is not hindered in the direction of the axis of the acoustic cylinder C, and has a degree of flexibility that can vibrate in the direction of the axis of the acoustic cylinder C. Is preferred. Examples of the material include metal, glass, ceramics, resin, rubber, and fiber.

Furthermore, in the present embodiment, LNG may be formed around the coolers 12a and 12b because LNG is used as the first heat medium CW. Although the said frost is preferable in the meaning which suppresses the spreading | diffusion to the exterior of the cool heat from the coolers 12a and 12b for the part adhering to the circumference | surroundings of the coolers 12a and 12b, There is a risk of taking heat away from the heaters 11a, 11b.
The acoustic cylinder C has an annular shape along the cylinder outer peripheral portion of the portion where the regenerators 13a and 13b are provided in the direction of the cylinder axis of the acoustic cylinder C and having an outer diameter larger than the diameter of the acoustic cylinder C. Insulation members 51a and 51b are provided. Thereby, in each of motor | power_engine 10a, 10b, the frost adhering to the circumference | surroundings of cooler 12a, 12b is prevented spreading to the heater 11a, 11b side.

The first heat medium flow path 20 (an example of a low-temperature refrigerant flow path) through which the first heat medium CW flows will be described.
In the present embodiment, the first heat medium flow passage 20 allows the first heat medium CW to flow through the coolers 12a and 12b of the pair of prime movers 10a and 10b in order, and then the working fluid. It arrange | positions so that it may flow through the site | part between the outer cylinder 30 and the acoustic cylinder C as a cooling mechanism. As a result, the cooling heat possessed by the LNG as the first heating medium CW is converted into vibration energy of sound waves by the prime movers 10a and 10b, and the remaining cooling heat cools the working fluid located at the resonance portion of the acoustic cylinder C. doing.
On the other hand, the second heat medium flow passage 70 through which the second heat medium HW flows is arranged so that the second heat medium HW flows in order to each of the heaters 11a, 11b of the prime movers 10a, 10b. Has been.
Regarding the flow order of the first heat medium CW and the second heat medium HW to the pair of prime movers 10a and 10b, the flow order of the first heat medium CW and the flow order of the second heat medium HW are reversed. The 1st heat-medium flow path 20 and the 2nd heat-medium flow path 70 are arrange | positioned so that it may become. Thereby, the temperature difference in each motor | power_engine 10a, 10b is enlarged.

  In addition, by using the structure which concerns on the said embodiment, a working fluid can be cooled from about 20 degreeC to about -100 degreeC, and, thereby, the sound speed of the sound wave which propagates the acoustic cylinder C is reduced, and an acoustic cylinder The cylinder length of C can be shortened by 20%.

[Another embodiment]
(1) In the above-described embodiment, a single thermoacoustic engine 100 of the thermoacoustic facility 100 includes a plurality (two) of prime movers 10a and 10b, and the first heat medium passage 20 is provided for each prime mover 10a and 10b. In contrast, an example in which the first heating medium CW is led in order (in series) is shown. However, the first heating medium CW may be guided in parallel to the plurality of prime movers 10a and 10b.
For example, as shown in FIG. 2, the first heat medium flow path 20 includes a first heat medium flow main pipe 20 a that flows the first heat medium CW on the upstream side, and the first heat medium flow path. The first heat medium flow branch pipes 20b and 20c are branched from the main pipe 20a. The first heat medium flow branch pipes 20b and 20c are respectively the coolers 12a and 12b of the prime movers 10a and 10b. Are arranged in a one-to-one correspondence. As a result, the first heat medium CW having the same temperature can be passed through the coolers 12a and 12b of the prime movers 10a and 10b.

Furthermore, in the other embodiment, the thermoacoustic equipment 100 includes a first thermoacoustic engine 100a and a second thermoacoustic engine 100b as a plurality (two in the other embodiment) of thermoacoustic engines. Each of the plurality of (two in the other embodiment) acoustic cylinders C1 and C2 includes the same number (two in the other embodiment) of the prime movers 10, as shown in FIG. In other words, the first acoustic cylinder C1 includes two prime movers 10a and 10b, and the second acoustic cylinder C2 includes two prime movers 10c and 10d.
The first heat medium flow branch pipe 20b flows through the cooler 12a of the prime mover 10a of the first acoustic cylinder C1, and then flows through the cooler 12c of the prime mover 10c of the second acoustic cylinder C2. The first heat medium flow branch pipe 20c flows through the cooler 12b of the prime mover 10b of the first acoustic cylinder C1, and then flows through the cooler 12d of the prime mover 10d of the second acoustic cylinder C2. .
By adopting this configuration, in each of the first thermoacoustic engine 100a and the second thermoacoustic engine 100b, the temperature of the first heat medium CW supplied to the plurality of prime movers can be made substantially equal.

The first heat medium flow branch pipe 20b and the first heat medium flow branch pipe 20c merge after passing through the prime movers 10a, 10b, 10c, and 10d, and are enclosed as a working fluid cooling mechanism of the second thermoacoustic engine 100b. After allowing the first heat medium CW to flow between the cylinder 32 and the second acoustic cylinder C2, between the outer cylinder 31 and the first acoustic cylinder C1 as a working fluid cooling mechanism of the first thermoacoustic engine 100a. The first heating medium CW is passed through.
The second heat medium passage channel 70 is not shown in the drawing and will not be described in detail. However, as with the first heat medium passage channel 20, a plurality (two in the different embodiment) are used. Branching to a first heat medium flow branch pipe (not shown) and a prime mover provided in each of the thermoacoustic engines 100a and 100b, the second at the same temperature in each of the thermoacoustic engines 100a and 100b. It arrange | positions so that the heat medium HW may be guide | induced.

(2) Although the number of prime movers provided in one thermoacoustic engine is two in the above embodiment, one may be provided separately, or a configuration in which three or more are provided may be employed.

(3) As shown in the above embodiment, the acoustic cylinder C includes not only a loop shape but also a straight tube shape. Further, an acoustic cylinder having a shape in which a straight pipe-shaped cylinder is connected to a loop-shaped cylinder is also included.

(4) In the above embodiment, an example in which the outer cylinder 30 is provided as an example of the working medium cooling mechanism has been described.
However, as the working medium cooling mechanism, for example, a configuration including a low-temperature refrigerant flow fluid in which the outer surface is provided in close contact with the outer peripheral surface of the acoustic cylinder C that flows through the first heat medium CW and functions as a resonance portion. May be adopted.

(5) In this invention, it can comprise as a vaporizer provided with the thermoacoustic installation 100 shown in the said embodiment.
That is, in addition to the thermoacoustic equipment 100 shown in the above embodiment, although not shown, the heating heat exchanger for heating the first heat medium CW as LNG and the heating section for heating are used. The first heat medium CW includes a direct expansion turbine that directly expands and a generator that is rotationally driven by the direct expansion turbine, and the first heat medium passage 20 is connected to the motor 10. After passing through the cooler 12 and the working medium cooling mechanism, the vaporizer can be arranged so as to guide the low-temperature refrigerant to the direct expansion flow path.

(6) In the above-described embodiment, an example in which LNG is used as the first heat medium CW has been described, but another heat medium may be used separately.

(7) In the above embodiment, an example in which engine cooling water is used as the second heat medium HW has been described. However, another heat medium such as engine exhaust gas may be used.

  The configuration disclosed in the above embodiment (including another embodiment, the same shall apply hereinafter) can be applied in combination with the configuration disclosed in the other embodiment, as long as no contradiction occurs. The embodiment disclosed in this specification is an exemplification, and the embodiment of the present invention is not limited to this. The embodiment can be appropriately modified without departing from the object of the present invention.

  The thermoacoustic equipment of the present invention and the carburetor equipped with the thermoacoustic equipment capable of reducing the overall size and improving the energy conversion efficiency per unit volume, and the apparatus for providing the carburetor equipped with the thermoacoustic equipment As such, it can be used effectively.

10: prime mover 11: heater 12: cooler 13: regenerator 20: first heat medium flow passage 20a: first heat medium flow main pipe 20b: first heat medium flow branch pipe 20c: first heat medium flow Flow branch pipe 30: Outer cylinder 40: Electric power generator 50: Shut-off wall 51: Thermal insulation member 70: Second heat medium passage 100: Thermoacoustic equipment C: Acoustic cylinder CW: First heat medium

Claims (9)

The acoustic cylinder in which the working medium is filled and the sound wave propagates is amplified between a heater for heating the working medium from the outside, a cooler for cooling the working medium from the outside, and the heater and the cooler. A thermoacoustic installation having at least one or more thermoacoustic engines provided with a power generator that generates electric power from vibration of sound waves, while providing at least one prime mover comprising a regenerator,
The cooler is configured to exchange heat between a low-temperature refrigerant supplied from the outside and the working medium inside the acoustic cylinder,
In the resonance part where the acoustic wave resonates in a portion other than the part where the prime mover and the power generator are provided in the acoustic cylinder, a low-temperature refrigerant supplied from the outside is caused to flow in the vicinity of the resonance part and the working medium and heat In the form of replacement, a working medium cooling mechanism for cooling the working medium inside the resonance unit is provided,
A low-temperature refrigerant flow path in which a low-temperature refrigerant supplied from outside is exchanged heat with the working medium by the cooler and then exchanged heat with the working medium by the working medium cooling mechanism. Thermoacoustic equipment is provided.   The said working-medium cooling mechanism is comprised from the low-temperature refrigerant | coolant fluid by which an outer surface is closely provided in the outer peripheral surface of the said acoustic cylinder which flows a low-temperature refrigerant | coolant inside and acts as the said resonance part inside. Thermoacoustic equipment.   The low-temperature refrigerant flow fluid is composed of an outer cylinder that hermetically surrounds the acoustic cylinder serving as the resonance section, and allows the low-temperature refrigerant to flow between the acoustic cylinder serving as the resonance section. The thermoacoustic installation according to claim 2, wherein the working medium is cooled in a form.   In the direction of the axis of the acoustic cylinder, the end of the portion where the heater is provided and the end of the low-temperature refrigerant flow as the working medium cooling mechanism are cooled by the low-temperature refrigerant flow. The thermoacoustic equipment according to claim 2 or 3, wherein the thermoacoustic equipment is provided apart by a cooling suppression distance that suppresses reaching the heater.   Inside the acoustic cylinder serving as the resonance portion, in the axial direction of the cylinder of the acoustic cylinder, an end of a portion where the heater is provided, and the low-temperature refrigerant flow fluid as the working medium cooling mechanism The thermoacoustic installation as described in any one of Claims 2-4 with which the flow suppression mechanism which suppresses the flow of the said working medium is provided in the area | region where the said regenerator is not provided between edge parts. .   The outer diameter portion of the acoustic cylinder has an outer shape along the cylinder outer peripheral portion of the portion where the regenerator is provided in the direction of the axis of the acoustic cylinder and having a diameter larger than the cylinder diameter of the acoustic cylinder. The thermoacoustic installation as described in any one of Claims 1-5 in which the annular | circular shaped heat insulation member which has is provided. A plurality of the thermoacoustic engines are provided,
The low-temperature refrigerant flow path guides the low-temperature refrigerant to all the coolers of the thermoacoustic engine and exchanges heat with the working medium, and then guides the low-temperature refrigerant to the working medium cooling mechanism to heat the working medium and heat. The thermoacoustic installation as described in any one of Claims 1-6 arrange | positioned so that it may replace | exchange. A plurality of the prime movers are provided in one thermoacoustic engine,
The low-temperature refrigerant flow path is composed of a low-temperature refrigerant flow main pipe through which the low-temperature refrigerant flows upstream and a plurality of low-temperature refrigerant branch branches branched from the low-temperature refrigerant flow main pipe.
The thermoacoustic equipment according to any one of claims 1 to 7, wherein each of the low-temperature refrigerant branch branches is arranged in one-to-one correspondence with each of the coolers of the prime mover. A vaporizer equipped with the thermoacoustic equipment according to any one of claims 1 to 8,
A heating heat exchanger that heats the low-temperature refrigerant, a direct expansion turbine that directly expands the low-temperature refrigerant heated by the heating heat exchanger, and a generator that is rotationally driven by the direct expansion turbine. An expansion channel,
The low-temperature refrigerant flow path is a vaporizer arranged to guide the low-temperature refrigerant to the straight expansion flow path after passing through the cooler and the working medium cooling mechanism of the prime mover.

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