JP3529827B2 - Power generator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power generator, and more particularly to improvement of MHD (Magneto Hidro Dynamics) power generation.

[0002]

2. Description of the Related Art As one of power generation methods, MHD (Magneto
Hidro Dynamics) Power generation is known. Here, the MHD power generation is to generate power by moving a fluid having conductivity in a magnetic field. MHD power generation has a simple structure,
In addition, since there is no part that does mechanical movement such as a turbine, it is expected that the capacity and efficiency of the device will be increased. Therefore, in recent years, MHD power generation has been actively researched, and various inventions and research results have been announced (Japanese Patent Laid-Open No. 4-1278).
66, JP-A-5-91715 and others).

The outline of the MHD power generator is as follows. FIG. 5: is explanatory drawing which shows the outline of the MHD generator of a prior art. The MHD power generator is roughly divided into an ionized gas (plasma) generation unit 100 and an MH.
It is configured by the D power generation unit 101. Ionized gas generator 1
In 00, a combustion device and a heat exchanger (neither is shown) are built in. Then, the combustion device is supplied with combustion gas such as LNG and burned. Further, a working fluid composed of a rare gas such as argon or helium is passed through the heat exchanger, and the working fluid is heated to reach an ionized gas (plasma) state.

Then, the working fluid that has become the ionized gas exits the ionized gas generation section 100 and is supplied to the MHD power generation section 101. The structure of the MHD power generation unit 101 is a flow path through which the working fluid passes, and in the MHD power generation unit 101, a strong magnetic field is formed in the flow path by an electromagnet. And the capture electrode for taking out electricity is provided in the said flow path. When the working fluid described above crosses the magnetic field when passing through the MHD power generation unit 101, a voltage is induced in the working fluid. Then, the voltage induced in the working fluid is taken out by the trapping electrodes, and a voltage is generated between the trapping electrodes.

The working fluid discharged from the MHD power generator 101 is
In order to utilize the waste heat, it enters the heat exchanger 103 and heat is exchanged. Then, by the heat extracted by the heat exchanger 103, steam or the like is newly generated, and power is generated by the steam turbine or the like. The working fluid that has exited the heat exchanger 103 is returned to the ionized gas (plasma) generating unit 100 and is heated.

[0006]

The MHD power generation has already been established as a power generation theory, and research on the outline of the power generation device is proceeding as described above. However, MH
The D power generation is still a developing technology and has not been put into practical use.

The technical difficulties that prevent the practical application of MHD power generation are:
It is mainly as follows. That is, in order to generate a large amount of power by MHD power generation, it is essential to use an ionized gas (plasma) as a working fluid. However, in order to produce an ionized gas, it is necessary to generate a high temperature of 2000 K or higher, and it is difficult to stably supply the ionized gas.
Furthermore, MHD power generation requires high-temperature ionized gas to pass through the flow path at high speed. Then, it is necessary to bring the ionized gas into contact with the capture electrode provided in the channel. Therefore, the capture electrode is exposed to high temperature in the flow channel and melts in a short time. The present invention is intended to solve the above-mentioned technical difficulties of MHD power generation, and provides a power generation device capable of supplying ionized gas in a stable manner and preventing melting of a trapping electrode. To aim.

In addition, there are the following problems in the prior art. That is, in the conventional power generation device, a mechanical power generation unit such as a steam turbine is provided in the subsequent stage of MHD power generation in order to use the heat without waste, but the heat is exclusively recovered by the heat exchanger. There is.

Explaining in the example of FIG. 5 described above, a working fluid such as argon is passed through the heat exchanger 103, and heat exchange is performed in the portion to generate steam. Then, this steam rotates a separate turbine. Therefore, according to the conventional power generator, there has been a complaint that heat loss at the heat exchanger 103 is unavoidable. The present invention solves these drawbacks together, and an object of the present invention is to provide a power generation device capable of performing MHD power generation and mechanical power generation without passing through a heat exchanger.

[0010]

A feature of the present invention for achieving the above-mentioned object is to provide a fluid flow path, a magnet, and a trapping electrode, which allows a fluid to pass through a magnetic field generated by the magnet, In a power generation device that generates a voltage between them, a multi-phase arc generating electrode is provided, and water is present around the multi-phase arc generating electrode, and an arc discharge is generated between the arc generating electrodes to generate a high temperature. A power generation device that produces gas and passes the hot gas through the magnetic field to generate electricity. Here, the multi-phase arc generating electrode is composed of a plurality of electrodes, and each phase voltage of a multi-phase AC power source is applied to each of the electrodes to generate a plurality of arc discharges between the electrodes. The water existing around the arc generating electrode may be in a liquid state or a gas state.

In the invention showing a preferred embodiment of the above-mentioned invention, the fluid flow passage is connected in an annular shape, water exists in the fluid flow passage, and the arc generating electrode is arranged in the fluid flow passage. It is a characteristic power generator.

Combustion gas is preferably supplied near the arc discharge portion between the arc generating electrodes.

Further, instead of the combustion gas or in addition to the combustion gas, a rare gas may be supplied near the arc discharge section.

Another aspect of the present invention for achieving the same object is to include a fluid flow path, a magnet, and a trapping electrode, wherein a fluid is passed through a magnetic field generated by the magnet and a voltage is generated between the trapping electrodes. A power generator comprising an MHD power generation unit and a mechanical power generation unit using a turbine, wherein the MHD power generation unit includes a multi-phase arc generation electrode, and water is present around the multi-phase arc generation electrode, The fluid flow path of the MHD power generation unit is connected to the turbine of the mechanical power generation unit.
In the power generation section, an arc discharge is generated between the arc generating electrodes to produce a high temperature gas, and the high temperature gas is mixed with the MHD.
The power generation device is characterized in that the fluid that has passed through the magnetic field of the power generation unit generates power and that the fluid that has flowed out of the MHD power generation unit is introduced into the turbine of the mechanical power generation unit to generate power.

The fluid flow path of the MHD power generation section and the turbine of the mechanical power generation section employed in the above-described invention are directly and annularly connected to form a series of fluid flow paths, and
It is desirable that water be present in the fluid channel and that a multi-phase arc generating electrode be disposed in the fluid channel.

In addition to the above-mentioned structure, a heat exchanger is arranged at or around a part of the series of fluid passages, and the heat medium in the heat exchanger is vaporized by the heat of the series of fluid passages. It is desirable to rotate a turbine by the heat medium to generate electricity.

[0017]

The power generator of the present invention applies the principle of MHD power generation, and utilizes arc discharge to generate ionized gas (plasma). That is, in the power generator of the present invention, the multi-phase arc generating electrode is provided, and water is present around the multi-phase arc generating electrode.

Since the arc generating electrodes used in the power generator of the present invention are of a multi-phase type, when arc discharge is generated between the arc generating electrodes, the distance between the electrodes is 1000.
A high temperature of 0K occurs. In the power generator of the present invention,
Since water is present around the multi-phase arc generating electrode, the water instantly evaporates and a part of the water reaches an ionized state.
Further, a part of the water becomes water gas and is separated into H ₂ and O ₂ and burns violently.

Then, the high temperature gas generated by these passes through the magnetic field to generate electricity. When the high-temperature gas passes through the magnetic field, the surrounding water or water vapor moves together with the high-temperature gas, and the water or the like comes into contact with the capture electrode to cool the capture electrode. Therefore, melting of the capture electrode is prevented.

In the power generator according to the second aspect, the arc generating electrode is arranged in the fluid flow path, and water exists in the fluid flow path. Therefore, the water in the fluid flow path is directly heated. Is supplied to the magnetic field. In the power generator of the present invention, the fluid flow paths are connected in an annular shape, and the high temperature gas that has passed through the magnetic field is
It becomes the surrounding water and is collected, and returns to the multi-phase arc generating electrode again.

In the power generator of the third aspect, since the combustion gas is supplied in the vicinity of the arc discharge portion between the arc generating electrodes, the combustion gas burns violently in the flow path, and the ambient atmospheric temperature rises. Let Therefore, the generation of ionized gas is further promoted.

In the power generator according to the fourth aspect, since the rare gas is supplied in the vicinity of the arc discharge portion between the arc generating electrodes, the rare gas is ionized and gasified to perform MHD power generation.

According to a fifth aspect of the power generation apparatus, in addition to the MHD power generation section, a mechanical power generation section using a turbine is provided. The MHD power generation unit includes a multi-phase arc generating electrode, and water is present around the multi-phase arc generating electrode. Therefore, when arc discharge is generated between the arc generating electrodes,
A high temperature of 10000K is generated between the electrodes, the surrounding water is instantly evaporated, and a part of the water is ionized, and the ionized gas crosses the magnetic field to generate electricity. At this time, since the surrounding water moves as the ionized gas passes through the magnetic field, the trapping electrode is cooled. In the power generator of the present invention, since the fluid flow path of the MHD power generation unit is connected to the turbine of the mechanical power generation unit, the gaseous or liquid fluid that exits the MHD power generation unit is the turbine of the mechanical power generation unit. Will be introduced to and contributed to power generation again.

In the power generator according to claim 7, a heat exchanger is arranged in a part of the fluid passage or in the periphery thereof, and the heat medium in the heat exchanger is vaporized by the heat of the series of fluid passages. Since the turbine is rotated by the heat medium to generate electricity, effective utilization of heat is further promoted.

[0025]

EXAMPLES Specific examples of the present invention will be described below. FIG. 1 is an explanatory diagram showing an outline of a power generator according to a specific embodiment of the present invention. 2 is a cross-sectional view of a main part of the power generator of FIG. 1, FIG. 2 (a) shows a peripheral portion of the arc generating electrode, and FIG. 2 (b) is a cross-sectional view taken along line AA of FIG. 2 (a). Indicates. FIG. 3 is a sectional view taken along line BB of FIG.

In FIG. 1, reference numeral 1 shows a power generator according to a specific embodiment of the present invention. The power generation device 1 of the present embodiment is configured such that an MHD power generation unit 3 and a mechanical power generation unit 6 are continuously provided in an annular fluid flow path 2, and two sets of these are connected to each other to form an annular shape. is there.

The fluid flow path 2 is composed of a tube having a rigidity capable of withstanding a considerable pressure and temperature. The fluid flow path 2 is provided with a replenishment pipe 4 for replenishing water everywhere. Then, water or water vapor exists in the fluid channel 2, and the water or water vapor is
Flows in the fluid flow path 2 in the clockwise direction. In this embodiment, the term "water" refers to both liquid water and water in the form of water vapor, and is called "liquid water" or "water vapor" if there is a particular need.

The MHD power generation unit 3 is composed of an ionized gas generation unit and a power generation unit that follows it. The ionized gas generation part is composed of six arc generation electrodes 8 and one fuel gas supply pipe 9. The arc generating electrode 8 is made of a non-consumable electrode such as carbon. Then, the six arc generating electrodes 8 are inserted at equal intervals from the periphery of the fluid channel 2 toward the center as shown in FIG. 2 (b), and are inclined at a constant angle in the traveling direction of the fluid. , The tips are arranged to form a circle in the center of the fluid flow path 2. An electrode feeding device (not shown) is provided, and the amount of protrusion of the arc generating electrode 8 into the fluid flow path 2 can be adjusted. That is, although the arc generating electrode 8 is made of a non-consumable electrode, it is inevitable that part of it melts or burns and becomes short over time because it is exposed to extremely high temperatures. When the arc generating electrode 8 is shortened due to combustion or the like, the arc generating electrode 8 is extended,
Maintain spacing between electrodes.

The connection state of the arc generating electrodes 8 will be described. The arc generating electrodes 8 employed in this embodiment are electrically connected to each other, and as shown in FIG. It is connected to each phase of the phase power supply 7. Each phase voltage is applied to each arc generating electrode 8 so that arc discharge is generated between the respective tips.

On the other hand, the fuel gas supply pipe 9 has a double pipe shape having an outer pipe 11 and a middle pipe 12. Fuel gas supply pipe 9
Is inserted from around the fluid flow path 2, and its tip is opened toward the center of the circle formed by the tip of the arc generating electrode 8. And the outer pipe 11 of the fuel gas supply pipe 9
Is connected to a source of combustible gas such as hydrogen gas, methane gas or ethane gas. The type of the flammable gas supplied from the outer pipe 11 is not particularly limited, but hydrogen gas among them produces water as a result of combustion, and thus is preferably used in the power generator 1 of this embodiment. The middle pipe 12 of the fuel gas supply pipe 9 is connected to an air supply source or an oxygen supply source. The gas supplied from the middle tube 12 may be either air or oxygen, but among them, air, particularly heated air is recommended. The reason for this is that when oxygen is directly supplied, the arc generating electrode 8 burns and is consumed.

In the power generation section of the MHD power generation section 3, six magnets 15 are arranged around the fluid flow path 2 and a trapping electrode 17 is provided between the magnets 15. A magnetic field is formed by the magnet 15 in the fluid flow path 2 in a portion corresponding to the power generation section of the MHD power generation section 3. Here, as shown in FIG. 3, two magnets 15 are provided around the fluid flow path 2 as a set, and the lines of magnetic force cross the fluid flow path 2 in the vertical direction. MHD
The magnet 15 used in the power generation unit 3 may be a permanent magnet,
It is desirable that the magnetic force be as strong as possible, and the use of electromagnets or superconducting magnets is recommended.

The downstream side of the MHD power generation section 3 is connected to the mechanical power generation section 6. More specifically, the MHD power generation unit 3
The downstream side of is directly connected to the fluid inlet of the turbine 18. The output shaft of the turbine 18 is connected to a generator (not shown). Further, the fluid outlet of the turbine 18 is continuous with another MHD power generation unit 3. The downstream side of the MHD power generation unit 3 is connected to the fluid inlet of another turbine 18, and the output of the turbine 18 continues to the MHD power generation unit 3 described first.

The downstream side of the MHD power generation section 3 and the turbine 18
A heat exchanger 19 for chlorofluorocarbon power generation is provided between the fluid inlet sides. The chlorofluorocarbon heat exchanger 19 performs heat exchange using chlorofluorocarbon as a heat medium. The CFC power generation heat exchanger 19 is connected to a turbine 20, and the output shaft of the turbine 20 is mechanically connected to a generator (not shown).

Next, the operation of the power generator 1 of this embodiment will be described. When operating the power generator 1 of the present embodiment, FIG.
From the three-phase AC power source 7 shown in (b), the arc generating electrode 8
To generate an arc discharge between the arc generating electrodes 8. In addition to energization of the arc generating electrode 8, fuel gas and air are discharged from the fuel gas supply pipe 9 toward the arc discharge. When the arc generating electrode 8 is energized from a three-phase alternating current power source as used in this embodiment, arc discharge is generated at the same time as energizing the arc generating electrode 8. Therefore, the power generator 1 can be started easily and can be automated. In the power generator 1 of this embodiment, since the three-phase alternating current is applied to the arc generating electrode 8, the total current of each phase is always 0.
Therefore, the ground wire is unnecessary, and the arc discharge is non-migrating without requiring the counter electrode. Therefore, the water around the arc generating electrode 8 is directly heated by the arc discharge. That is, according to the power generator 1 of this embodiment, water is heated with extremely high efficiency.

The temperature of the arc discharge reaches 4000 K to 10000 K, the surrounding water evaporates immediately and becomes water gas, which is separated into hydrogen gas and oxygen gas. On the other hand, it should be noted here that the water heated by the arc discharge generated from the six electrodes using the three-phase alternating current as the power source, which is adopted in the present embodiment, is more than that generated by the usual electrolysis. Separated in several steps into hydrogen gas and oxygen gas. The reason for this is that since a considerable current and voltage are applied to the water by the arc generating electrode 8, the surrounding water has an increased decomposition ability and the water is exposed to an extremely high temperature by the arc discharge. It is considered that a large amount of water is decomposed by the synergistic effect of both.

Further, since a large amount of ultraviolet rays and light waves are generated by the arc discharge, it is expected that the decomposition of water is also promoted by these actions. Furthermore, in this embodiment,
Since the arc discharge is generated by the three-phase alternating current, a rotating magnetic field is generated at the tip of the arc generating electrode 8 and electromagnetic vibration is induced. Therefore, it is presumed that the electromagnetic vibration also accelerates the decomposition of water. In addition, when the liquid water is rapidly heated by the Joule heat generated by the electric current or the arc discharge, a rapid thermal expansion of the water occurs and a violent detonation similar to thunder is generated. And as a result, a violent shock wave is generated at the same time. This shock wave is also expected to contribute to the decomposition of water.

A part of the hydrogen gas and the oxygen gas generated by the above-mentioned action is combusted, and in addition to this combustion, the combustion gas released from the fuel gas supply pipe 9 is combined with oxygen in the supply air. And burn. Therefore, an extremely large amount of heat is generated at the tip of the arc generating electrode 8 and its downstream side. Then, the steam is ionized and gasified by receiving the heat. On the other hand, since water exists around the arc-generating electrode 8, the arc-generating electrode 8 itself is cooled and less melted.

The vaporized water vapor 10 is shown in FIG.
And as shown in FIG. 3, it flows at high speed in the central portion of the fluid flow path 2.
Then, the ionized gasified water vapor 10 traverses the magnetic field formed by the magnet 15 to cause separation of electric charges, and an electromotive force works. Then, this electromotive force is taken out by the trapping electrode 17, and a voltage is generated between the trapping electrodes 17.

It should be noted here that in the power generator 1 of the present embodiment, since water exists in the fluid flow path 2, the surrounding water (liquid) is accompanied by the movement of the ionized gasified steam 10. Alternatively, water vapor that does not lead to ionization gasification moves. That is, in the power generator 1 of the present embodiment, as shown in FIG. 3, the gas or liquid layer 13 having a low temperature exists around the gas that is in the ionized gas state and flows at high temperature and high speed. Therefore, the temperature of the peripheral portion is relatively low, even though the central portion of the fluid flow path 2 has a high temperature. Therefore, the temperature rise of the capture electrode 17 is suppressed, and the capture electrode 17 is prevented from melting.

The ionized gasified water vapor is used in the MHD power generation unit 3
The energy required for power generation is lost when passing through. Further, the ionized gasified water vapor mixes with the surrounding water vapor or liquid water as it moves away from the arc generating electrode 8,
Homogenize gradually. That is, heat exchange is smoothly performed between the ionized gasified water vapor and the ordinary water vapor and liquid water, and a large amount of water vapor is generated. After leaving the MHD power generation unit 3 for a while, the fluid in the fluid channel 2 is filled with water vapor. This steam enters the turbine 18 and rotates the turbine 18. As described above, the turbine 18 is connected to a power generator (not shown), and power is generated by the power generator.

Most of the steam exiting the turbine 18 is liquefied and enters the other MHD power generator 3. After that, the same steps as described above are repeated to generate power.

In addition to the above-described power generation, in the power generator 1 of this embodiment, the turbine 1 and the downstream side of the MHD power generator 3 are connected.
A fluorocarbon heat exchanger 19 is provided between the input sides of the eight. In the heat exchanger 19 for CFC power generation, CFC is vaporized and the pressure is further increased. The chlorofluorocarbon gas is supplied from the chlorofluorocarbon heat exchanger 19 to the turbine 20, and the turbine 20 also generates electric power.

The above embodiments have shown the configuration in which the fuel gas supply pipe 9 is provided and the gas is supplied from the fuel gas supply pipe 9 to burn in the fluid passage 2. This structure is recommended because it can efficiently generate a large amount of heat, but the present invention can be realized by omitting the fuel gas supply pipe 9 and merely by performing arc discharge of the arc generating electrode. When the power generator of the present invention is configured only by the arc discharge of the arc generating electrode, there is a possibility that a part of the water flowing in the fluid flow path 2 is burned by the intense heating and impact of the arc discharge to generate energy. is there.

In the above embodiment, six arc generating electrodes were adopted, and three-phase alternating current was applied to them.
In addition, the number between the arc generating electrodes can be increased or decreased by a multiple of 3, for example, when three-phase alternating current is used. The power supply is not limited to the three phases used in this embodiment, and six-phase or more alternating currents can be used. In the description of the operation of the embodiment, FIG. 3 illustrates the configuration in which the water vapor 10 in the ionized state is in direct contact with the capture electrode 17. Such a configuration in which the working fluid in the ionized state is brought into direct contact with the capture electrode 17 is a common sense mode of MHD power generation. However, in the power generator 1 of the present embodiment, even if the water vapor 10 in the ionized state and the trapping electrode 17 are exceptionally separated from each other, the power can be taken out. That is, in the power generator 1 of this embodiment, since water exists in the fluid flow path 2, the water serves as a conductor.

In the above embodiments, the phase state of water in the fluid passage 2, that is, whether the water is liquid or gas or ionized gas, is determined by the amount of combustion gas and arc discharge. It depends on the current amount of Therefore, the above explanation
It merely shows an ideal state, and may differ from the above description depending on the situation. For example, the turbine 18 may be mixed with steam and liquid water, or the area between the arc generating electrodes may be almost filled with water vapor.

In the above embodiment, the two turbines 18 are described as being separate, but two turbines 18 are provided on the same drive shaft.
A double structure in which one turbine 18 is connected may be used.
Further, the turbine 20 for CFC power generation is based on the above-mentioned turpin 1
It does not matter if it is connected to 8.

The power generator 1 of the previous embodiment has been described as one in which water is heated to generate steam, and the steam is ionized and gasified to perform MHD power generation. However, the power generation device of the present invention is not limited to the one that performs the MHD power generation by ionizing the steam to the MHD power generation, and may be configured to perform the MHD power generation by ionizing the other fluid into the gas. Next, as a modified embodiment of the present invention, a configuration will be described in which rare gas is ionized and gasified to perform MHD power generation. In the configuration of the modified embodiment, the same members as those in the previous embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

FIG. 4 shows a power generator 3 according to a modified embodiment of the present invention.
It is sectional drawing which shows the principal part of 0. FIG. 4 shows a portion corresponding to FIG. 2A of the previous embodiment. In the power generation device 30 of this embodiment, the gas supply pipe 32 is a single-layer pipe. A rare gas such as argon or helium is supplied from the gas supply pipe 32. Further, in the power generation device 30 of the present embodiment, a seeds supply pipe 33 is provided in addition to the gas supply pipe 32. An alloy 35 containing thin metal potassium or metal cesium is inserted through the seed supply pipe. Then, the wire is sequentially drawn out and sequentially supplied during the arc discharge.

In the power generator 30 of this embodiment, the rare gas is injected from the gas supply pipe 32 toward the arc discharge.
Then, the rare gas is heated to raise the temperature and is ionized and gasified.
Here, since the rare gas is easily ionized and gasified as compared with the water vapor of the previous embodiment, the ionized gas is smoothly generated. At the same time, the alloy 35 supplied from the seed supply pipe 33 is melted, further vaporized, and dispersed in the rare gas. Then, the ionized gasified rare gas containing a seed material such as potassium flows downstream, passes through the magnetic field, and MHD power generation is performed. Also in the power generator 30 of the present embodiment, since the surrounding water also moves with the movement of the rare gas, the capture electrode 17 is cooled.

In the power generator 30 of this embodiment, only the rare gas is supplied from the gas supply pipe 32, but of course, the combustion gas and oxygen are also supplied together with the rare gas, and the amount of heat generated is supplemented by the combustion of the combustion gas. Is also possible. In addition, in the power generation device 30 of the present embodiment, the seed material is supplied by the alloy 3 containing fine metal potassium or metal cesium.
Performed by 5. The reason for adopting the configuration as in this embodiment is as follows. First, the reason for thinning the sheath material is to facilitate the supply of the sheath material.

The reason for alloying the seed material is that the simple substance such as potassium has high reactivity and it is difficult to control the supply amount. However, the seed material can also be supplied by directly supplying powdered metal cesium or the like to the arc discharge. It is also possible to manufacture the arc generating electrode with an alloy containing a sheath material and supply the sheath material little by little as the arc generating electrode melts by heat. Further, a method in which the circumference of the arc generating electrode is covered with a sheath material or the like and the sheath material is melted by the heat generated by the arc discharge may be considered. The supply of the seed material as used in this embodiment is of course applicable to the power generation device 1 of the previous embodiment.

[0052]

In the power generator of the present invention, the multi-phase arc generating electrode is provided, and water is present around the multi-phase arc generating electrode. Since the arc electrode used in the power generator of the present invention is of a multi-phase type, when an arc discharge is generated between the arc generating electrodes, an extremely high temperature is generated between the electrodes. Then, the water around the arc generating electrode is instantly evaporated, and a part of the water reaches the ionized state.

In the power generator of the present invention, the high temperature gas thus generated passes through the magnetic field to generate power. Then, in the power generator of the present invention, when the high temperature gas passes through the magnetic field, the surrounding water or water vapor moves together with the high temperature gas, contacts the capture electrode, and cools the capture electrode. Therefore, the power generator of the present invention has an effect of preventing melting of the trapping electrode. . Further, in the past, it was difficult to make a high temperature state of 3000 K or more, but according to the present invention, this is easy, a gas in a plasma state can be smoothly generated, and ionization of a working fluid is significantly promoted. effective. Therefore, the present invention solves the most difficult technical problem of MHD power generation, and has an excellent effect that greatly contributes to the practical application of MHD power generation.

In the power generator according to the second aspect, the arc generating electrode is arranged in the fluid passage, and water exists in the fluid passage. Therefore, the water in the fluid passage is directly heated. Is supplied to the magnetic field. Therefore, in the power generator of the present invention, water is heated with extremely high efficiency. In addition, the fluid flow path is connected in an annular shape, and the high-temperature gas that has passed through the magnetic field is collected as surrounding water and returns to the multiphase arc generating electrode again. Thus, in the power generator according to the second aspect, power is generated by circulating water or steam in the flow path,
All the heat possessed by water is reduced and effectively reused. Therefore, the power generator according to claim 2 has an effect of being able to convert energy into electric power without waste. In the power generator according to the second aspect, water is confined and reused in the fluid flow path, and in principle, drainage is not discharged, so there is an effect that the environment is not destroyed.

In the power generator according to the third aspect of the present invention, since the combustion gas is supplied in the vicinity of the arc discharge portion between the arc generating electrodes, the combustion gas burns violently in the flow path, and the ambient atmospheric temperature is extremely high. It will be expensive. Therefore, the generation of ionized gas is smooth and large. Therefore, the power generation device according to claim 3 has an effect of being able to generate a large output power.

In the power generator according to the fourth aspect, since the rare gas is ionized and gasified to perform MHD power generation, there is an effect that the power generator can be operated at a lower temperature.

In the power generator according to the fifth aspect of the present invention, since a mechanical power generation unit using a turbine is provided in addition to the MHD power generation unit,
Effective use of heat is possible, and there is an effect of high power generation efficiency.

In the power generator of the sixth aspect, the fluid flow passage of the MHD power generation unit and the turbine of the mechanical power generation unit are directly and annularly connected to form a series of fluid flow passages, and Water exists in the flow channel, and water flows in the fluid flow channel to directly generate power. Therefore, according to the power generator of claim 6, the heat exchanger is unnecessary,
The heat loss of the heat exchanger, which has been inevitable in the past, has the effect of completely eliminating it. Therefore, the power generator according to claim 6 has an excellent effect of high power generation efficiency.

In the power generator according to claim 7, a heat exchanger is arranged in a part of or in the periphery of the fluid passage, and the heat medium in the heat exchanger is vaporized by the heat of the series of fluid passages. Since the turbine is rotated by the heat medium to generate electricity, there is an effect that the effective use of heat is further promoted.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an outline of a power generator according to a specific embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part of the power generator of FIG. 1, (a)
Shows a cross-sectional view of the peripheral portion of the arc generating electrode, and (b) shows
The (A) sectional view on the AA line is shown.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a cross-sectional view showing a main part of a power generator according to a modified example of the present invention.

FIG. 5 is an explanatory diagram showing an outline of a conventional MHD power generator.

[Explanation of symbols]

1 generator 2 fluid flow paths 3 MHD power generation unit 6 Mechanical power generation unit 7 Three-phase power supply 8 arc generating electrodes 9 Fuel gas supply pipe 15 magnets 17 Capture electrode 18 turbine 19 Freon heat exchanger 20 turbine 30 power generator 32 gas supply pipe 33 seeds supply pipe 35 alloy

Claims (7)

(57) [Claims] 1. A fluid flow path, a magnet, and a trapping electrode,
In a power generator that allows a fluid to pass through a magnetic field generated by a magnet to generate a voltage between capture electrodes, a multiphase arc generating electrode is provided, and water is present around the multiphase arc generating electrode, and A power generation device, characterized in that an arc discharge is generated between arc generating electrodes to produce a high temperature gas, and the high temperature gas is passed through the magnetic field to generate electric power. 2. The power generator according to claim 1, wherein the fluid passages are connected in an annular shape, water is present in the fluid passages, and the arc generating electrodes are arranged in the fluid passages. . 3. The power generator according to claim 1, wherein combustion gas is supplied near the arc discharge portion between the arc generating electrodes. 4. A rare gas is supplied in the vicinity of the arc discharge portion between the arc generating electrodes.
The power generator according to any one of 1 to 3. 5. A fluid flow path, a magnet, and a capture electrode are provided,
A power generator comprising an MHD power generation unit that allows a fluid to pass through a magnetic field generated by a magnet and generates a voltage between capture electrodes, and a mechanical power generation unit that uses a turbine. The MHD power generation unit includes a multi-phase arc generation electrode. Water is present around the multi-phase arc generating electrode, and the fluid flow path of the MHD power generation unit is connected to the turbine of the mechanical power generation unit.
In the D power generation section, an arc discharge is generated between the arc generating electrodes to produce a high temperature gas, and the high temperature gas is mixed with the MH.
Power is generated by passing it through the magnetic field of the D power generation unit, and MHD
The power generation device is characterized in that the fluid discharged from the power generation unit is introduced into the turbine of the mechanical power generation unit to generate power. 6. The fluid flow path of the MHD power generation section and the turbine of the mechanical power generation section are directly and annularly connected to form a series of fluid flow paths, and water is contained in the fluid flow paths. The power generator according to claim 5, wherein a multi-phase arc generating electrode that is present and is arranged in the fluid flow path. 7. A heat exchanger is arranged at or around a part of the series of fluid passages, and the heat of the series of fluid passages is provided by the heat of the series of fluid passages.
The power generator according to claim 6, wherein the heat medium in the heat exchanger is vaporized, and the turbine is rotated by the heat medium to generate electricity.