KR20150128602A - A Circulator Movement Device for Magnetocaloric Material and Power System - Google Patents

Abstract

According to an embodiment of the present invention, a cyclic movement device of a magnetothermal material comprises: a closed loop container for containing magnetothermal fluid including a magnetothermal material; a magnetic field generator for moving the magnetothermal fluid; and a heat source for changing a magnetic property of the magnetothermal material. The closed loop container comprises a cooling part for cooling the magnetothermal material having the increased temperature.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetorheological material circulation moving device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulating device for a magnetocaloric material and a power generation system using the same. More particularly, the present invention relates to a device for circulating a magnetic thermal fluid based on a magnetic thermal material, And a power generation system using the same.

Magnetocaloric material is a material that has magnetism at low temperature and loses magnetism at high temperature. It has a thermal property that dissipates heat when a magnetic field is applied and absorbs heat when a magnetic field disappears. The properties of these magnetic heating materials are called Magnetocaloric Effect.

Generally, ferromagnets have a magnetic thermal effect. Iron, which is a typical ferromagnetic material, rapidly loses its magnetism at 768 ° C. This temperature is called the Currie Temperature of Iron. However, since the Curie temperature of iron is considerably high and the effect of magnetic heating is low, it is difficult to commercialize it. In recent years, new magnetism-heating materials have been developed that exhibit magnetothermal effects even in the vicinity of room temperature. In some countries, studies are being actively conducted to utilize the materials for magnetic cooling.

As an application field of such a magnetic thermal material, the development of a refrigerator using self-cooling is proceeding and it is almost reached to commercialization level. In Korea, the technology is being used to develop air conditioners and refrigerators without compressors.

Meanwhile, the heat dissipation solution is a technical field for lowering the temperature of a heat source area where heat is generated, and is a technology field used to lower the temperature of a heat source part which should be protected in the whole industry including an electronic product field in which a concentrated heat source exists.

As a heat dissipation solution, it is a natural heat dissipation method using a convection / radiation phenomenon by utilizing a heat sink that maximizes a heat dissipation area to lower the temperature of a concentrated heat source, and a forced heat dissipation Method is mainly utilized. In addition, in the case of a product having a large calorific value, a water-cooled forced heat radiation method in which a fluid is forcedly circulated to lower the temperature of a heat source is also utilized.

In the case of the water-cooled forced heat dissipation system maximizing the heat dissipation efficiency, the cooling efficiency is very good. However, since the pump must be driven to circulate the fluid forcibly, a separate energy source is required, The mechanical structure must be included, which causes durability and stability problems. Particularly, in the existing water cooling type cooling apparatus, the pump inside the fluid is a main factor of failure.

Energy Harvesting technology is a technology that produces energy by harvesting or pulsing unused energy. It is a technology that produces very small power of several to mW. This energy harvesting technology is a technology that is mainly aimed at enhancing the convenience of the user rather than saving energy or improving efficiency. Typical examples of such energy harvesting include a method using a piezoelectric element, a method using a thermoelectric element, and the like.

However, in the method using a piezoelectric element, instantaneous power is generated by using a large voltage generated by mechanical pressure, so that continuous power generation is difficult and the amount of generated energy is extremely small, and a method using a thermoelectric element Heat energy is converted into electric energy by using heat transfer phenomenon, usually hundreds? And has a very low energy conversion efficiency at the above operating temperature.

One embodiment of the present invention is to provide a heat dissipation solution that circulates fluid without mechanical fluid circulation to lower the temperature of the heat source.

One embodiment of the present invention is for circulating fluid without mechanical fluid circulation to produce electrical energy.

Embodiments according to the present invention can be used to accomplish other tasks not specifically mentioned other than the above-described tasks.

A magnetic thermal material circulating apparatus according to an embodiment of the present invention includes a closed loop vessel containing a magnetic thermal fluid containing a magnetic thermal material, a magnetic field generator for moving the magnetic thermal fluid, And the closed loop container includes a cooling portion for cooling the magnetically heated material with a raised temperature.

In addition, a magnetorheological material circulating apparatus according to an embodiment of the present invention includes a closed loop vessel containing a magnetorheological fluid containing a magnetic thermal material, and a magnetic field generator for moving the magnetorheological fluid, The closed loop container includes a thermal contact portion to which a heat source for changing the magnetic property of the magnetically heating material is applied and a cooling portion to cool the magnetically heated material to which the temperature is raised.

Here, the magnetism-heating material loses its magnetic property when it is heated to a predetermined temperature or higher by the heat source, and may have magnetism when it is lowered by a predetermined temperature.

The magnetoresistive material may be at least one compound selected from the group consisting of manganese iron (MnFe) and phosphorus (P), arsenic (As), germanium (Ge), and silicon (Si).

Further, the closed loop container may be formed of a material of a non-magnetic material.

Further, a heat sink may be attached to the cooling region.

In addition, the cooling region can be cooled by using a fan that generates air flow.

In addition, the magnetic field generating device may include a permanent magnet.

The magnetic field generator may further include a magnetic circuit in which a winding is wound.

In addition, the magnetic field generating device may include an electromagnet which generates a magnetic field by flowing an electric current.

The magnetic field generator may further include a controller for controlling the magnitude of the current.

In addition, the controller may adjust the direction of the current.

The closed loop container may include a first region and a second region, and a thermal contact region to which the heat source is applied may be disposed between the first region and the second region, It is possible to operate a first magnetic field generating apparatus that generates a magnetic field in one direction or a second magnetic field generating apparatus that generates a magnetic field in the second direction in the second region.

The magnetic field generating device may further include a temperature sensor for measuring a temperature of the magnetoresistive material at a thermal contact area to which the heat source is applied, and the control unit may operate the magnetic field generating device when the magnetoresistive material is at a predetermined temperature or higher.

A power generation system using a magnetorheological material circulation apparatus according to an embodiment of the present invention includes a closed loop vessel containing a magnetorheological fluid containing a magnetorheological material, a magnetic field generator for moving the magnetorheological fluid, Comprising a heat source that changes the magnetic properties of the material, a turbine that rotates by the flow of the magnetothermal fluid, and a generator that produces electrical energy based on the rotation of the turbine, wherein the closed- And a cooling portion for cooling the material.

Here, the magnetism-heating material loses its magnetic property when it is heated to a predetermined temperature or higher by the heat source, and may have magnetism when it is lowered by a predetermined temperature.

Also, the magnetoresistive material may be a manganese iron (MnFe) series and at least one compound of phosphorus (P), arsenic (As), germanium (Ge), and silicon (Si).

One embodiment of the present invention can provide a heat dissipation solution that circulates fluid without a mechanical fluid circulation device to lower the temperature of a heat source and can produce electric energy by circulating the fluid without a mechanical fluid circulation device.

Fig. 1 is a basic configuration diagram of a magnetic thermal material circulation moving apparatus according to a first embodiment of the present invention.
Fig. 2 is a view showing an example in which the position of the magnetic field generating device of Fig. 1 is modified. Fig.
Fig. 3 is a view showing an example in which the cooling region is modified in Fig. 1. Fig.
Fig. 4 is a view showing an example in which a heat sink is attached to a cooling region in Fig. 1. Fig.
Fig. 5 is a view of the magnetorheological material circulating apparatus of Fig. 4 further including a cooling fan.
Fig. 6 is a diagram showing an example using permanent magnets as the magnetic field generating apparatus of Fig. 1;
7 is a view showing an example of using an electromagnet as the magnetic field generating apparatus of Fig.
FIG. 8 is a view showing a magnetic field generator of FIG. 7 with a control unit for controlling the magnitude of a current for generating a magnetic field.
Fig. 9 is a view showing a modification of the magnetic field generator of Fig. 8. Fig.
10 is a view showing the addition of a temperature sensor to the magnetorheological material circulation moving device of FIG.
11 is a view showing a power generation system using a magnetorheological circulation moving device according to the first embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same reference numerals are used for the same or similar components throughout the specification. In the case of publicly known technologies, a detailed description thereof will be omitted.

Whenever a component is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements, not the exclusion of any other element, unless the context clearly dictates otherwise. Also, the term "part" in the description means a unit for processing at least one function or operation, which may be implemented by hardware, software, or a combination of hardware and software.

The embodiment of the present invention can provide a heat dissipation solution by using a circulation moving device using the characteristics of the magnetic heating material without using a pump for forced circulation of the fluid. In this case, a magnetocaloric fluid is utilized for the circulating device using the characteristics of the magnetic thermal material. Hereinafter, a method of filling a magnetic material with an appropriate size in a fluid, a magnetically responsive fluid mixed with oil by processing a magnetic material at a micrometer level, a magnetic fluid formed by molding a magnetic material into nanoscale ultrafine particles Etc. are referred to as magnetic thermal fluids.

Magnetic Fluid is a fluid in which a magnetic powder is dispersed in a liquid such as water or an organic solvent in a colloidal form, and then a surfactant is added to prevent precipitation or aggregation.

The magnetic powder is an ultrafine particle powder having a particle size of 0.01 to 0.02 μm and has a Brownian motion peculiar to ultrafine particles. Therefore, even if a magnetic field, gravity, centrifugal force or the like is applied from the outside, the concentration of the magnetic particles in the fluid is kept constant and characterizes the magnetic fluid.

MR Fluid (Magnetorheological fluid), which is similar to a magnetic fluid, means a fluid containing magnetic particles at the micrometer level inside a fluid such as an oil. It changes the apparent viscosity of a fluid as a magnetic field is applied Smart Fluid.

The apparatus for circulating a magnetic thermal material according to an embodiment of the present invention includes a structure for applying and cooling heat in a state in which a magnetic thermal fluid is filled in a closed-loop container. In order to cause movement of the magnetic thermal material, It can be implemented by applying a magnetic field.

Hereinafter, with reference to Fig. 1, the principle of the magnetorheological material circulation moving device will be described.

Fig. 1 is a basic configuration diagram of a magnetic thermal material circulation moving apparatus according to a first embodiment of the present invention.

The apparatus for circulating a magnetic material according to the first embodiment of the present invention includes a closed loop container 100 containing a magnetic thermal fluid containing a magnetic thermal material, a magnetic field generator 200 for moving a magnetic thermal fluid, And a heat source 300 that changes the magnetic characteristics according to the temperature of the thermal material.

The closed loop container 100 having a circular or polygonal cross-sectional shape includes a thermal contact portion 110 to which a heat source 300 that changes the magnetic characteristics of the magnetic thermal material is applied and a cooling portion (120).

The operation principle of the magnetorheological material circulating apparatus according to the first embodiment of the present invention is such that when a material having magnetism and a substance having loss of magnetism are present in the closed loop container 100, And the material with which it is attracted to the magnetic field.

The magnetic heating material inside the closed loop vessel 100 in which the magnetic material is uniformly distributed can not be moved in one direction due to the uniformity of magnetic distribution even when a magnetic field is applied. When heat is applied from the outside through the heat source contact portion 110 of the closed loop container 100, the magnetorheological material around the inner heat source contact portion 110 of the closed loop container 100 exceeds the Curie temperature and loses magnetism . When the magnetically heating material that exceeds the Curie temperature passes through the cooling part 120 of the closed loop container 100, the temperature becomes lower than the Curie temperature and becomes magnetism again. Therefore, the magnetic thermal material having magnetism and the magnetorheological material having lost magnetism exist in the closed loop container 100, and the magnetic thermal material can be moved in one direction by the magnetic field.

When the heat source 300 is continuously applied and cooling of the magnetic thermal material is continuously performed in the cooling region 120, the magnetic thermal material is circulated and moved. The magnetic heating material inside the closed loop vessel 100 has a portion where the temperature distribution becomes equal to the equilibrium state and a portion where the magnetism is lost beyond the Curie temperature and a portion having magnetism below the Curie temperature are constantly present. When a magnetic field is applied to a material having a non-uniform magnetic distribution or a material having a fluid state, the movement of the magnetic thermal fluid including the magnetic thermal material continuously occurs, so that the circulation movement to be achieved in the present invention can be continuously maintained .

The magnetic field generator 200 may be attached to the outside of the closed loop container 100 so as to attract magnetic thermal material inside the closed loop container 100 to move the magnetic thermal fluid. Generally, the magnetic field generator 200 is located outside the closed loop container 100 to generate a magnetic field, and the magnetic field generator 200 may be highly utilized.

In order to allow the magnetic field outside this closed-loop container 100 to reach the internal magnetically-heating material, the material of the closed-loop container 100 preferably utilizes a nonmagnetic material that passes through the magnetic field. For example, the material forming the closed-loop container 100 may be ordinary plastic or glass. In the case of stainless steel, since it has various compositions, it can be a material for forming the closed loop container 100. Further, the closed loop container 100 can be formed of a rigid material without sticking when the magnet is brought close to the magnet.

When the closed loop container 100 is made of a magnetic material for a specific purpose, the magnetic field generator 200 may be installed in the closed loop container 100 as shown in FIG.

Fig. 2 is a view showing an example in which the position of the magnetic field generating device of Fig. 1 is modified. Fig.

When the closed loop container 100 is made of a magnetic material for a specific purpose, the permanent magnet 201 can be used as the magnetic field generator 200 in the closed loop container 100. When the permanent magnet 201 is arranged in a direction to draw the flow of fluid inside the closed-loop container 100, it is possible to make attractive force pulling the magnetic portion of the magnetic thermal fluid filled with the non-uniform magnetic material. If the heat source 300 is continuously applied to the rear side of the permanent magnet, a continuous flow of the magnetothermal fluid can be generated.

The heat source 300 increases the temperature of the magnetic heating material to change the magnetic characteristics of the magnetic heating material. The heat source 300 according to the embodiment of the present invention can be utilized not only by a deliberately generated heat source but also by solar heat, heat generated in electronic components, heat generated in a heating device, and heat in various facilities requiring cooling have. Since it is difficult to increase the temperature of the magnetic heating material by such a heat source 300, a magnetic heating material showing a magnetic heating effect near room temperature is required.

Further, in order to use an excellent permanent magnet as the magnetic field generator 200, a magnetoresistive material showing a magnetic heat effect near room temperature is required. To utilize the magnetothermal effect, a DC magnetic field is required. The most convenient and efficient way to generate this is to use a permanent magnet. However, most permanent magnets are sensitive to heat and can not be used in areas with high temperatures. It has the best permanent magnet characteristics and the most used Nd series permanent magnet is 100? The characteristic is rapidly deteriorated in the vicinity. Therefore, in order to use an excellent permanent magnet, a magnetically-heating material exhibiting a magnetothermal effect near room temperature is required, and the magnetically-heating material preferably has a Curie temperature near room temperature.

Table 1 below shows the Curie temperature and the available water volume for each material of magnetic thermal material.

material Pharmaceutical ingredient Curie temperature (?) Available volume [t] Remarks Iron - 748 No limit - Magnetite - 585 No limit Magnetic fluid Gd metal Gd 19 1,000 Giant magnetothermal effect at low temperature
(Giant Magnetocaloric effect) Gd4 (Si1-xGex) 5 Ge -143 ~ -3 140 La (Fe, Si) 13Hy La -73 ~ 57 22,000 MnFe (P, As)
(P, Ge, Si) - -123 ~ 67
-23 ~ 307 No limit

As shown in Table 1 above, gadolinium (Gd) has a problem in commercialization as a magnetorheological material or a rare material which can be utilized at room temperature at a Curie temperature of 19 ?. At least one of manganese iron (MnFe), phosphorus (P), arsenic (As), germanium (Ge) and silicon (Si) has a Curie temperature at room temperature and can be used as a magnetic thermal material .

Hereinafter, with reference to Figs. 3 to 5, an example of a cooling method of the magnetorheological material circulation moving apparatus according to the first embodiment of the present invention will be described.

Fig. 3 is a view showing an example in which a cooling region is modified in Fig. 1, and Fig. 4 is a view showing an example in which a heat sink is attached to a cooling region in Fig. Fig. 5 is a view of the magnetorheological material circulating apparatus of Fig. 4 further including a cooling fan.

The length of the cooling part 120 of the closed loop container 100 is lengthened to cool the magnetically heating material, and the temperature is naturally reduced by exposing the air to the room temperature. For example, as shown in FIG. 3, the cooling part 120 of the closed loop container 100 may be formed in a radiator shape to increase the length of the cooling part 120.

4, a heat sink 121 having a maximized heat dissipation area can be attached to the cooling part 120 of the closed-loop container 100. As shown in Fig. By using the heat sink 121 having a wider heat dissipating area according to the amount of heat generated by the heat source 300, the magnetic thermal material can be cooled to have magnetism again.

If the heat source 300 is too large and natural heat dissipation by the heat sink 121 is insufficient, a fan 122 for generating an air flow is added as shown in FIG. 5, .

Hereinafter, a variation of the magnetic thermal material circulating apparatus according to the first embodiment of the present invention will be described with reference to FIGS. 6 to 10. FIG.

Fig. 6 is a diagram showing an example of using permanent magnets as the magnetic field generating apparatus of Fig. 1, and Fig. 7 is a diagram showing an example of using electromagnets as the magnetic field generating apparatus of Fig. FIG. 8 is a view showing a magnetic field generator of FIG. 7 with a control unit for controlling the magnitude of a current for generating a magnetic field. FIG. 9 is a view showing a modified example of the magnetic field generating apparatus of FIG. 8, and FIG. 10 is a diagram showing a temperature sensor added to the magnetic material circulating moving apparatus of FIG.

6, the permanent magnet 210 is used as the magnetic field generating apparatus 200. The permanent magnet 210 is a permanent magnet. The permanent magnet 210 may be attached to the closed loop container 100. Also, the strength of the magnetic field of the permanent magnet 210 can be increased by using a high magnetic permeability magnetic circuit such as a silicon steel plate or ferrite. When the permanent magnet 210 is used as the magnetic field generator 200, the flow of the fluid can be continuously generated without any external energy source other than the applied heat source.

7 uses an electromagnet 220 for generating a magnetic field by flowing an electric current electrically to the magnetic field generator 200. The magnetorheological material circulating apparatus according to the third embodiment shown in Fig. When the electromagnet 220 is used, a power supply 230 for supplying current may be required.

On the other hand, although not shown in the drawing, a magnetic field can be basically formed by using permanent magnets, and the strength of a magnetic field can be increased or decreased by using a magnetic circuit in which a separate winding is wound.

As shown in FIG. 8, the magnetic field generator 200 of the magnetoresistive material circulating apparatus according to the third embodiment may further include a controller 240 that can adjust the magnitude of the current. When the magnetic field generating apparatus 200 includes the control unit 240, the control unit 240 can turn on / off the current according to the determination to generate or block the flow of the magnetic heating material. Also, by controlling the magnitude of the electric current of the electromagnet 220 in response to a command from the control unit 240, it is possible to control the movement speed of the magnetic thermal material. In addition, the control unit 240 can adjust the moving direction of the magnetic thermal material by changing the direction of the electric current of the electromagnet 220. When the direction of the electric current of the electromagnet 220 is changed, the polarity of the electromagnet 220 is changed in the opposite direction, so that the moving direction of the magnetic thermal material can be changed from the counterclockwise direction or the counterclockwise direction to the clockwise direction.

As shown in Fig. 9, the magnetorheological material circulating device of Fig. 8 including the control unit 240 has a plurality of electromagnets 220 and 221 disposed therebetween with a heat source interposed therebetween, Can be changed. For example, when the controller 220 operates the electromagnet 220 above the heat source, the direction of movement of the magnetizable material can be clockwise, and the electromagnet 221 located below the heat source In the case of operation, the moving direction of the magnetic thermal material can be set to the counterclockwise direction. In this case, the directions of the electric currents flowing through the electromagnets 220 on the upper side of the heat source and the electromagnets 221 on the lower side of the heat source are made different from each other, so that the directions of the magnetic fields of the electromagnets 220 and 221 can be made different from each other.

As shown in FIG. 10, the magnetorheological material circulating apparatus of FIG. 8 including the control unit 240 includes a temperature sensor 400 for measuring the temperature of the magnetic heating material at a thermal contact site 110 to which the heat source 300 is applied, As shown in FIG. The control unit 240 collects temperature information of the magnetic heating material from the temperature sensor 400 and operates the electromagnet 220 when the temperature of the magnetic heating material exceeds the Curie temperature. Because the uniformity of the magnetic distribution is uniform before the temperature of the magnetic heating material exceeds the Curie temperature, the circulation movement of the material can not be generated even if a magnetic field is applied. Therefore, 220 can be operated.

The magnetothermal material circulation mobile device according to the embodiment of the present invention can be utilized in a cooling system. In the case of electric and electronic products, there is a concentrated heat of several W to several tens of W in the CPU, FPGA, etc., and if the temperature of the component rises due to such heat generation, the life of the product is shortened sharply. The magnetic material circulating and moving apparatus according to the embodiment of the present invention can reduce the temperature of the component by using the heat source 300 as the heat generation component.

Since the magnetic thermal material circulating apparatus according to the embodiment of the present invention can cool a product or a part using the heat source 300 as the heat source of the component without a separate mechanical device such as a pump for circulating the fluid, The failure is less likely to occur and the durability of the cooling apparatus can be improved.

11 is a view showing a power generation system using a magnetorheological circulation moving device according to the first embodiment of the present invention.

11, the power generation system according to the first embodiment of the present invention includes, in addition to the configuration shown in FIG. 1, a turbine 500 that rotates by the flow of a magnetic thermal fluid, And a generator 700 for generating electric energy based on the electric energy. The turbine 500 installed in the magnetic thermal fluid can convert the flow of the magnetic thermal fluid into the rotational kinetic energy and transmit the rotational kinetic energy to the generator 700 through the rotary shaft 600. In FIG. 11, the generator 700 plays a role of converting rotational kinetic energy into electric energy. As the generator 700, any type of generator such as an alternator or a DC generator capable of converting rotational kinetic energy into electric energy can be used.

The power generation system according to the first embodiment of the present invention can be applied not only to the embodiment shown in FIG. 1 but also to the embodiments shown in FIG. 2 to FIG.

The power generation system according to the first embodiment of the present invention can be applied to an energy harvesting field for converting heat into electrical energy using the characteristics of the magnetic thermal material. In the power generation system according to the first embodiment of the present invention, waste heat, solar heat, and geothermal heat are applied to a fluidized magnetoresistive material (magnetic thermal fluid) to generate a flow and then converted into kinetic energy to produce electric energy. The power generation system according to the first embodiment of the present invention can continuously generate electric power because electric energy can be produced using a continuous flow of fluid.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

100: closed loop container 110: thermal contact area
120: cooling region 121: heat sink
122: cooling fan 200: magnetic field generator
210: permanent magnet 220: electromagnet
230: power supply unit 240:
300: heat source 400: temperature sensor
500: turbine 600: rotary shaft
700: generator

Claims (17)

A closed loop vessel containing a magnetically heated fluid containing a magnetically heating material,
A magnetic field generating device for moving the magnetothermal fluid, and
And a heat source for changing the magnetic property of the magnetically heating material,
Wherein the closed loop container includes a cooling portion for cooling the magnetically heated material with a raised temperature. A closed loop vessel containing a magnetic thermal fluid containing a magnetic thermal material, and
And a magnetic field generating device for moving the magnetothermal fluid,
Wherein the closed loop container includes a thermal contact portion to which a heat source for changing a magnetic characteristic of the magnetically heating material is applied and a cooling portion to cool the magnetically heated material to which the temperature is raised. 3. The method according to claim 1 or 2,
Wherein the magnetic heating material loses its magnetic property when it is heated by the heat source to a predetermined temperature or more and has magnetism when it is lower than a predetermined temperature by the cooling area. 4. The method of claim 3,
Wherein the magnetic thermal material is at least one compound selected from the group consisting of manganese iron (MnFe), phosphorus (P), arsenic (As), germanium (Ge), and silicon (Si). 3. The method according to claim 1 or 2,
Wherein the closed loop container is formed of a material of a non-magnetic material. 3. The method according to claim 1 or 2,
And a heat sink is attached to the cooling region. The method of claim 6,
And a cooling portion is cooled by using a fan that generates air flow. 3. The method according to claim 1 or 2,
Wherein the magnetic field generator comprises a permanent magnet. 9. The method of claim 8,
Wherein the magnetic field generator further comprises a magnetic circuit around which a winding is wound. 3. The method according to claim 1 or 2,
Wherein the magnetic field generating device includes an electromagnet for generating a magnetic field by flowing an electric current. 11. The method of claim 10,
Wherein the magnetic field generator further comprises a control unit for controlling the magnitude of the current. 12. The method of claim 11,
Wherein the control unit adjusts the direction of the current. 12. The method of claim 11,
Wherein the closed loop container includes a first region and a second region,
A thermal contact portion to which the heat source is applied is positioned between the first region and the second region,
Wherein the control unit is operable to actuate a first magnetic field generator for generating a magnetic field in a first direction in the first region or to activate a second magnetic field generator in the second region for generating a magnetic field in a second direction, Mobile device. 12. The method of claim 11,
Further comprising a temperature sensor for measuring a temperature of the magnetic heating material at a thermal contact portion to which the heat source is applied,
Wherein the control section operates the magnetic field generating apparatus when the magnetically heating material is at a predetermined temperature or higher. A closed loop vessel containing a magnetically heated fluid containing a magnetically heating material,
A magnetic field generating device for moving the magnetothermal fluid,
A heat source for changing the magnetic property of the magnetically-
A turbine rotating by the flow of the magnetothermal fluid, and
And a generator for producing electric energy based on rotation of the turbine,
Wherein the closed-loop vessel includes a cooling portion for cooling the magnetically-heated material with a raised temperature. 16. The method of claim 15,
Wherein the magnetic heating material loses magnetism when it is heated to a temperature that is higher than a predetermined temperature by the heat source and has magnetism when it is lower than a predetermined temperature by the cooling portion. 17. The method of claim 16,
Wherein the magnetically heating material is at least one compound selected from the group consisting of manganese iron (MnFe), phosphorus (P), arsenic (As), germanium (Ge) and silicon (Si).

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