JP5653885B2 - Solar furnace equipment - Google Patents

Description

  The present invention relates to a solar furnace apparatus. In detail, it is related with the solar furnace apparatus provided with the light-receiving part for light-receiving sunlight and taking out thermal energy.

2. Description of the Related Art Conventionally, it is widely performed to collect sunlight rays and use the thermal energy. At this time, generally, a heat medium is circulated through a light receiving unit that receives the collected sunlight to extract heat energy.
For example, in Patent Document 1, sunlight is condensed by a heliostat, led to an opening of a heat receiver body serving as a casing, and compressed into a heat exchange heat receiving pipe disposed along the inner wall surface of the heat receiver body. A technique is disclosed in which air is circulated and heated, and power is generated by a gas turbine unit using the heated compressed air. Here, a heat insulating material is attached to the inner wall surface of the heat receiver main body over the entire area so as to reduce the thermal energy of the compressed air lost from the heat receiver main body.

JP 2011-007458 A

However, the above-described prior art has a problem that it is not possible to prevent heat energy from being lost from the heat receiver body through the opening.
The present invention has been devised to solve the above problems. That is, the problem to be solved by the present invention is to improve the energy recovery efficiency of the solar furnace device by reducing the thermal energy lost from the window part that receives the sunlight rays to the light receiving part.

In order to solve the above problems, the solar furnace apparatus of the present invention takes the following means.
First, the first invention is a solar furnace device provided with a light receiving part for receiving solar rays and extracting thermal energy. Light receiving portion is disposed inside the casing heat insulating layer is formed on the inner face, the heat generated by the light of the sunlight, you heated by contacting the heat medium in the casing to the heat medium. The casing includes a window portion that guides sunlight into the casing and causes the light receiving portion to receive the sunlight. The window portion includes a transparent member that blocks entry and exit of the substance through the window portion, and a vacuum layer that reduces heat conduction through the window portion. The light receiving portion is formed with a light receiving groove in which a surface in contact with the heat medium protrudes toward the heat medium side. The light receiving groove is arranged so as not to block the solar light by extending along a surface arranged so as to be perpendicular to the solar light guided by the window portion and the solar light toward the surface. And an area of the surface on which the light receiving unit comes into contact with the heat medium and heats the heat medium.
According to the first aspect of the present invention, the loss of thermal energy due to convection and diffusion of the substance can be prevented by blocking the entry and exit of the substance through the window portion. Further, by reducing the heat conduction through the window portion by the vacuum layer, it is possible to prevent the loss of heat energy without blocking the sunlight rays collected on the light receiving portion.
Further, according to the configuration in which the light receiving groove is provided with a surface that is perpendicular to the solar light guided by the window portion, the reflection of the solar light in the light receiving groove is reduced, and the energy of the solar furnace device is reduced. Recovery efficiency can be improved.
Further, according to the configuration in which the light receiving portion contacts the heat medium by the light receiving groove and the area of the surface that heats the heat medium is increased, the energy efficiency when the light receiving portion heats the heat medium can be improved.

Next, the second invention is the above-described first invention, in which the direct light condensing lens that condenses the direct light beam of the solar light on the light receiving unit, the flat mirror that reflects the solar light toward the casing, and the flat mirror Sunlight tracking that tracks the sun by moving the reflected light collecting lens that collects the reflected sunlight into the light receiving unit, the casing, the light receiving unit, the direct light collecting lens, the plane mirror, and the reflected light collecting lens. The window portion is formed at a plurality of locations of the casing, and guides the sunlight rays that have passed through the direct light condenser lens and the sunlight rays that have passed through the reflected light condenser lens to the light receiving portion through separate optical paths. Is.
According to the second invention, the condensing means (direct light condensing lens, reflected light condensing lens, and plane mirror) of the solar furnace device tracks the sun integrally with the casing and the light receiving unit. For this reason, when condensing sunlight, it is not necessary to individually control each component of the condensing means, and the configuration of the solar furnace device is simplified. Further, since the window portions are formed at a plurality of locations of the casing and the direct light beam and the reflected light beam are collected by different optical paths, it becomes easy to dispose each component of the light collecting means in the solar furnace device.
By the way, even when there is a dent in the mirror surface of the mirror, the reflected light can be collected by the concave mirror surface. However, in this case, depending on the angular relationship between the mirror surface and the incident light, the shade caused by the recess of the mirror surface falls to other portions of the mirror surface, so that the mirror surface of that portion does not reflect the incident light. In other words, in the light collecting means of the solar furnace device, when the mirror surface of the mirror has a dent, the light collecting ability of the light collecting means may be reduced depending on the angular relationship between the mirror surface and the sun.
That is, according to the second aspect of the invention, the sunlight rays reflected by the plane mirror are condensed on the light receiving unit by the reflected light condensing lens, thereby preventing the shade from falling on the mirror surface of the mirror and reducing the light collecting ability. be able to. Furthermore, the manufacturing cost of the mirror can be suppressed and the solar furnace device can be made cheaper.

Further, according to a third invention, in the first or second invention described above, the casing is formed in a long straight pipe shape, and a light receiving portion is disposed along the longitudinal direction thereof. The heat medium is circulated in the longitudinal direction, and the window is formed in a long shape along the longitudinal direction of the casing.
According to the third aspect of the invention, the heat medium can be continuously heated while the heat medium is continuously passed through the long light receiving portion. For this reason, the solar furnace device can efficiently extract thermal energy from solar rays.

Furthermore, according to a fourth aspect of the present invention, in any one of the first to third aspects described above, the transparent member is formed in a hollow shape inside and includes a vacuum layer in the hollow portion.
According to the fourth invention, the vacuum layer is formed inside one member called a transparent member. For this reason, maintenance of a vacuum layer can be simplified by improving the airtightness of a transparent member, and the structure of a solar furnace apparatus can be simplified.
Further, a fifth invention is the above-described first invention, wherein the light receiving groove includes a plurality of radiators formed in a plate shape or a rod shape toward a side where the light receiving portion contacts the heat medium. It is.
According to the fifth aspect of the invention, by providing the light receiving groove of the light receiving portion with a plurality of radiators formed in a plate shape or a rod shape, the area where the light receiving portion contacts the heat medium is increased and the light receiving portion is heated. The energy efficiency when heating the medium can be improved.
Furthermore, a sixth invention is the above-described fifth invention, wherein the light receiving portion is formed in a tube shape having an inner wall surface, and contacts the heat medium inside the heat medium to heat the heat medium. In this light receiving part, the light receiving part is connected to another radiator or the inner wall surface of the light receiving part formed on the inner side where the light receiving part comes into contact with the heat medium.
According to the sixth aspect of the present invention, in the light receiving part that is formed in a tube shape and heats the heat medium inside, a function as a support is added to the radiator of the light receiving part to increase the strength of the light receiving part. can do.

It is a schematic diagram showing the power generation equipment with which the solar furnace apparatus which concerns on the 1st Embodiment of this invention was applied. It is the II-II sectional view taken on the line of FIG. It is the elements on larger scale of FIG. 2, and represents the structure of the window part of the said solar furnace apparatus. It is an expanded sectional view showing the structure of the window part of the solar furnace apparatus which concerns on the 2nd Embodiment of this invention.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.
<First Embodiment>
First, the configuration of the solar furnace apparatus 10 according to the first embodiment will be described with reference to FIGS. 1 to 3. As shown in FIG. 2, the solar furnace device 10 condenses the sunlight rays L by the direct light condensing lens 14, the reflected light condensing lens 15, and the plane mirror 16 (that is, condensing means) to receive the light receiving portion of the casing 11. 12 is made to receive light. The light receiving unit 12 takes out heat energy from the received sunlight L and heats the water w in the casing 11. Here, the water w corresponds to the “heat medium” in the present invention.

As shown in FIG. 1, the water w is first supplied from the water source W to the water tank T2 in a liquid state and stored, and is supplied from the water tank T2 to the solar furnace device 10. Next, the water w is heated by the solar furnace device 10 to change its state into high-pressure steam (or supercritical fluid), and in this state, the water w is supplied to and stored in the steam tank T1. The water w stored in the steam tank T1 drives the prime mover P, and its state changes to low-pressure steam.
In the present embodiment, the prime mover P is a steam engine, and its driving force is used for power generation by the generator G. A part of the water w after driving the prime mover P is recovered in a liquid state by the condenser C and returned to the water tank T2. Thereby, while reducing the quantity of the water w supplied from the water source W, a part of thermal energy which the water w after driving the motor | power_engine P can be collect | recovered.

The light receiving unit 12 is formed in a long straight pipe shape and circulates water w in the longitudinal direction (vertical direction as viewed in FIG. 1). The light receiving portion 12 is disposed inside a casing 11 formed in a long straight pipe shape so as to be along the longitudinal direction of the casing 11 (vertical direction as viewed in FIG. 1).
As shown in FIG. 3, the light receiving unit 12 receives the condensed sunlight rays L, generates heat, and conducts the heat in a direction along the surface of the light receiving unit 12 (see the heat transfer direction H <b> 1). However, the water w is heated (see the heat transfer direction H2). For this reason, the light-receiving part 12 can heat the water w inside thereof more uniformly.

Here, as shown in FIG. 2, a plurality of light receiving grooves 12 </ b> A (three in the present embodiment) are formed in the light receiving portion 12. And the light-receiving part 12 is comprised so that the sunlight ray L may be received by each said light-receiving groove 12A. Thereby, the area which the light-receiving part 12 contacts the water w increases, and the energy efficiency at the time of the light-receiving part 12 heating the water w improves. Each light receiving groove 12A is formed by denting the straight pipe of the light receiving portion 12 into a long straight line from the surface side along the longitudinal direction (vertical direction as viewed in FIG. 1).
As shown in FIG. 3, each of the light receiving grooves 12 </ b> A is curved so that the bottom of the groove is perpendicular to the sunlight rays L that are collected. Thereby, the reflection of the solar ray L in each light receiving groove 12A can be reduced, and the energy recovery efficiency of the solar furnace apparatus 10 can be improved. Each light receiving groove 12A includes a plurality of (three in the present embodiment) radiators 12B formed in a plate shape toward the inner side (lower side in FIG. 3) of the light receiving unit 12. . Thereby, the area which the light-receiving part 12 contacts the water w increases, and the energy efficiency at the time of the light-receiving part 12 heating the water w improves.

As shown in FIGS. 2 and 3, the casing 11 includes a heat insulating layer 11 </ b> A formed on the inner surface of the casing 11, a window portion 13 that guides the sunlight L into the casing 11 and causes the light receiving portion 12 to receive light, It has.
As shown in FIG. 3, the heat insulating layer 11 </ b> A is disposed so as to cover the light receiving unit 12 from the outside, and blocks heat transfer in the direction from the light receiving unit 12 to the outside (see the heat transfer direction H <b> 3). It is configured. Thereby, the amount of thermal energy escaping from the light receiving unit 12 to the outside can be reduced, and the energy recovery efficiency of the solar furnace device 10 can be improved.
As shown in FIGS. 1 to 3, the window portion 13 extends in the longitudinal direction (vertical direction as viewed in FIG. 1) of the casing 11 at a plurality of locations (three locations in the present embodiment, see FIG. 2) of the heat insulating layer 11 </ b> A. It is formed in the shape of a long hole opened along. Here, each window portion 13 is formed at a position corresponding to each light receiving groove 12A of the light receiving portion 12, so that the light receiving portion 12 can receive sunlight rays L in each light receiving groove 12A.

A transparent member 13A is fitted in each of the window portions 13. Each of the transparent members 13A is configured to transmit light and block the entry / exit of the substance through each window portion 13. Thereby, it can prevent that the thermal energy of the light-receiving part 12 is lost from each window part 13 by the convection and diffusion of a substance, and can improve the energy recovery efficiency of the solar furnace apparatus 10. FIG.
As shown in FIG. 3, the transparent member 13A includes a vacuum layer 13B therein. For this reason, the thermal conductivity of the transparent member 13A is reduced while maintaining the property of transmitting light. In other words, each window portion 13 is configured to reduce the heat conduction through each window portion 13 by each vacuum layer 13B. Each vacuum layer 13B is formed inside one member called transparent member 13A.
Thereby, the loss of thermal energy due to heat conduction through the transparent member 13A can be prevented and the energy recovery efficiency of the solar furnace device 10 can be improved without blocking the sunlight L condensed on the light receiving unit 12. it can. Moreover, maintenance of the vacuum layer 13B can be simplified by increasing the airtightness of the transparent member 13A, and the configuration of the solar furnace device 10 can be simplified.

Here, the condensing means of the solar furnace device 10 will be described. As shown in FIGS. 1 and 2, the condensing means of the solar furnace device 10 has a direct-light condensing lens 14 that condenses the direct light rays of the solar rays L on the light receiving unit 12 and the solar rays L toward the casing 11. And a pair of reflected light condensing lenses 15 for condensing the sunlight L reflected by the respective plane mirrors 16 onto the light receiving unit 12.
By the way, even when there is a dent in the mirror surface of the mirror, the reflected light can be collected by the concave mirror surface. However, in this case, depending on the angular relationship between the mirror surface and the incident light, the shade caused by the recess of the mirror surface falls to other portions of the mirror surface, so that the mirror surface of that portion does not reflect the incident light. In other words, in the light collecting means of the solar furnace device, when the mirror surface of the mirror has a dent, the light collecting ability of the light collecting means may be reduced depending on the angular relationship between the mirror surface and the sun.
That is, according to the above configuration, the sunlight ray L reflected by the plane mirror 16 is condensed on the light receiving unit 12 by the reflected light condensing lens 15, so that the shade falls on the mirror surface of the mirror and the light condensing ability is reduced. Can be prevented. Furthermore, the manufacturing cost of a mirror can be suppressed and the solar furnace apparatus 10 can be made cheaper.

In addition, as shown in FIG. 2, the sunlight ray L which passed the direct light condensing lens 14 and the sunlight ray L which passed each reflected light condensing lens 15 respectively passes from a separate window part 13 through a separate optical path. It is guided to the light receiving unit 12.
For this reason, the direct light collection is performed by arranging the window 13 in correspondence with the optical path of the sunlight L that the direct light collection lens 14 and the set of the plane mirror 16 and the reflected light collection lens 15 collect. The arrangement of the lens 14, the plane mirror 16, and the reflected light collecting lens 15 can be facilitated.

  As shown in FIGS. 1 and 2, the direct light condensing lens 14 and each reflected light condensing lens 15 are plano-convex cylindrical lenses (see FIG. 1) that are long in the direction perpendicular to the curvature direction (see FIG. 1). 2). The lenses 14 and 15 are arranged such that the longitudinal direction thereof is along the longitudinal direction of the casing 11 (vertical direction as viewed in FIG. 1) with the plane side facing the window portion 13 (see FIG. 2). It is arranged. As shown in FIG. 1, each of the plane mirrors 16 is formed in a long shape and is arranged so that the longitudinal direction thereof is along the longitudinal direction of the casing 11 (the vertical direction in the drawing).

  Sun rays L can generally be regarded as parallel rays. Here, the plane mirror has a property of reflecting parallel rays as parallel rays. In addition, the cylindrical lens has a property that neither light collection nor light diffusion is performed in a direction perpendicular to the curvature direction. Further, the plano-convex cylindrical lens has a property that when a parallel light beam is incident from the convex surface side, the parallel light beam is condensed (imaged) on the plane side of the cylindrical lens. Here, the line segment resulting from the light collection is imaged so that its direction is perpendicular to the direction of curvature of the cylindrical lens.

As shown in FIG. 2, the light receiving grooves 12 </ b> A that are formed in the shape of a long straight line through the window portion 13 that is formed in the shape of the long hole, make the sunlight L incident on the direct light condensing lens 14. Can be condensed. Further, the sunlight L is reflected by each plane mirror 16 in the state of parallel rays and is incident on each reflected light condensing lens 15, and the light is formed in a long linear shape through the window portion 13 formed in a long hole shape. The light can be condensed in the groove 12A.
For this reason, the solar furnace device 10 continuously distributes the water w while continuously circulating the water w in the longitudinal direction (vertical direction as viewed in FIG. 1) of the light receiving unit 12 formed in a long straight pipe shape. Can be heated. Thereby, the solar furnace apparatus 10 can take out thermal energy from the solar radiation L efficiently.

By the way, the solar furnace apparatus 10 of 1st Embodiment is provided with the solar light tracking apparatus 17 which improves the energy recovery efficiency of the solar furnace apparatus 10 by tracking the sun, as shown in FIG. This solar light tracking device 17 includes a base 17A that is integrally fixed to the ground, an installation base 17B that is integrally fixed to the casing 11 via a support 11B, and the installation base 17B that is attached to the base 17A. And a plurality of motors 17D for tilting the installation base 17B by applying a driving force to the jack 17F, and controlling the motors 17D to tilt the installation base 17B. And a control device 17E that directs the fixed installation surface 17C to the sun.
Here, the direct light condensing lens 14 is integrally fixed to the casing 11 by a support column 14A. Each reflected light collecting lens 15 is integrally fixed to the installation surface 17C side of the installation table 17B by a support column 15A. Each plane mirror 16 is integrally fixed to the installation surface 17C side of the installation table 17B by a column 16A.

With the above-described configuration, the solar light tracking device 17 uses the installation surface 17C of the installation table 17B as the condensing means (that is, the direct light condensing lens 14, the reflected light condensing lens 15, and the plane mirror 16) of the casing 11 and the solar furnace device 10. ) With the sun. In other words, each structure of the condensing means of the solar furnace apparatus 10 tracks the sun integrally with the casing 11 and the light receiving part 12 inside thereof.
For this reason, when condensing the sunlight L, it is not necessary to individually control each component of the condensing means, and the configuration of the solar furnace device 10 is simplified. Moreover, since the angle of the sunlight L which strikes the casing 11 and the condensing means is constant, the sunlight rays in a range blocked by the casing 11 and its support 11B can be condensed by the direct light condensing lens 14. Furthermore, each support | pillar 14A, 15A, 16A of the condensing means of the solar furnace apparatus 10 can be arrange | positioned in the position which does not interfere with the sunlight L, and the fall of the condensing capability of the solar furnace apparatus 10 can be prevented.

<Second Embodiment>
Then, the structure of the solar furnace apparatus 20 which concerns on 2nd Embodiment is demonstrated using FIG. The solar furnace device 20 according to the second embodiment is a modified embodiment of the solar furnace device 10 according to the first embodiment. Therefore, about the structure which is common with each structure of the solar furnace apparatus 10 which concerns on the said 1st Embodiment, from the code | symbol attached | subjected to each structure of the solar furnace apparatus 10 which concerns on 1st Embodiment, the number of the tenth place The reference numerals are replaced by “2”, and the detailed description thereof is omitted.
In the solar furnace device 20 of the second embodiment, as shown in FIG. 4, the vacuum layer 23 </ b> B of the window portion 23 is disposed between the transparent member 23 </ b> A and the light receiving portion 22. In other words, the vacuum layer 23B is formed by exhausting the air between the transparent member 23A and the light receiving unit 22 by the vacuum pump 23C and the exhaust pipe 23D. Here, when air enters the space between the transparent member 23A and the light receiving unit 22 for some reason, the vacuum layer 23B is lost. In this case, the vacuum layer 23B can be formed again by re-driving the vacuum pump 23C and exhausting the air that has entered.
According to the said structure, the heat conduction through the window part 23 can be reduced by the vacuum layer 23B, and the energy recovery efficiency of the solar furnace apparatus 20 can be improved. Furthermore, the manufacturing cost of the transparent member 23A can be suppressed, and the solar furnace device 20 can be made cheaper.

Here, the window portion 23 has a window frame 23 </ b> E formed of metal and is integrally welded to the light receiving portion 22. Further, a transparent member 23A formed in a plate shape is fixed to the window frame 23E by a bolt 23G with a gasket 23F interposed therebetween. As a result, the space between the transparent member 23A and the light receiving unit 22 can be airtight, and the vacuum layer 23B can be maintained.
In the solar furnace device 20, the amount of heat escaping from the light receiving unit 22 to the outside through the window frame 23E and the bolt 23G is considered to be negligibly small. However, the energy recovery efficiency of the solar furnace device 20 can be further improved by forming the window frame 23E and the bolt 23G with a material having low thermal conductivity or covering the head of the bolt 23G with a heat insulating material. .

The present invention is not limited to the appearance and configuration described in the first and second embodiments described above, and various modifications, additions, and deletions can be made without changing the gist of the present invention. For example, the following various forms can be implemented.
(1) The shapes of the direct light condensing lens and the reflected light condensing lens are not limited to plano-convex cylindrical lenses, and can be set as appropriate, for example, a toric lens. Further, each lens can be reduced in weight by using each lens as a Fresnel lens.
(2) It is not necessary to use a lens as the condensing means of the solar furnace device, and for example, a configuration in which sunlight rays are condensed by a concave mirror can be used.
(3) The light collecting means can be omitted from the solar furnace device.
(4) A configuration in which the solar light tracking device individually controls and moves the light collecting means of the solar furnace device can be used.
(5) The solar light tracking device can be omitted from the solar furnace device.
(6) The distribution path of the heat medium is not limited to the inside of the light receiving section, and a distribution path that can transmit heat energy from the light receiving section and can reduce the heat energy that escapes to the outside by the casing is appropriately set. be able to.
(7) The heat medium distributed to the solar furnace device is not limited to water, and a fluid that can be distributed can be set as appropriate.
(8) It is not necessary to circulate the heat medium in the solar furnace device. For example, a structure in which a metal having high thermal conductivity is connected to the light receiving unit and heat energy is extracted by heat conduction from the metal can be used.
(9) The shape and arrangement of the radiator are not limited to the shapes of the first and second embodiments. That is, for example, the radiator can be formed in a rod shape. Further, the radiator can be connected to another radiator or the inner wall surface of the light receiving portion, and this radiator can be additionally provided with a function as a support column for increasing the strength of the light receiving portion.
(10) The radiator and the light receiving groove of the light receiving unit can be omitted.
(11) The shape and arrangement of the window portion and the casing are not limited to the shapes of the first and second embodiments. For example, only one circular window portion is arranged. It can be changed as appropriate.
(12) The prime mover driven by the solar furnace device is not limited to the steam engine, and any heat engine such as a steam turbine can be used.
(13) The solar furnace device is not limited to the one that drives the prime mover and generates power with the generator. For example, a configuration in which thermal energy is directly converted into electric energy by a thermoelectric conversion member can be used. Moreover, the structure which utilizes directly the driving force of a motor | power_engine, or the structure which utilizes heat energy for a chemical reaction directly can also be used.

DESCRIPTION OF SYMBOLS 10 Solar furnace apparatus 11 Casing 11A Heat insulation layer 11B Post 12 Light-receiving part 12A Light-receiving groove 12B Radiator 13 Window part 13A Transparent member 13B Vacuum layer 14 Direct light condensing lens 14A Post 15 Reflected light condensing lens 15A Post 16 Plane mirror 16A Post 17 Solar tracking device 17A Base 17B Installation table 17C Installation surface 17D Motor 17E Control device 17F Jack 20 Solar furnace device 21 Casing 21A Heat insulation layer 22 Light receiving portion 22A Light receiving groove 22B Radiator 23 Window portion 23A Transparent member 23B Vacuum layer 23C Vacuum pump 23D Exhaust pipe 23E Window frame 23F Gasket 23G Bolt C Condenser G Generator H1 Heat transfer direction H2 Heat transfer direction H3 Heat transfer direction L Sunlight P Prime mover T1 Steam tank T2 Water tank W Water source w Water (heat medium)

Claims (3)

It is a solar furnace device equipped with a light receiving part for receiving solar rays and taking out thermal energy,
The light receiving unit is disposed inside a casing having a heat insulating layer formed on an inner surface thereof , and heats the heat medium in the casing by contacting the heat medium with heat generated by receiving the sunlight. ,
The casing includes a window portion that guides the sunlight into the casing and causes the light receiver to receive the sunlight.
The window portion includes a transparent member that blocks entry and exit of a substance through the window portion, and a vacuum layer that reduces heat conduction through the window portion ,
In the light receiving part, a light receiving groove is formed by projecting a surface in contact with the heat medium toward the heat medium side,
The light receiving groove does not block the sunlight by extending along the surface arranged so as to be perpendicular to the sunlight guided by the window and along the sunlight toward the surface. The solar furnace device is characterized in that the area of the surface on which the light receiving unit is in contact with the heat medium and heats the heat medium is increased . It is a solar furnace apparatus of Claim 1, Comprising:
The said light-receiving groove | channel is equipped with the several heat radiator formed in plate shape or rod shape toward the side where the said light-receiving part contacts the said heat medium, The solar furnace apparatus characterized by the above-mentioned. It is a solar furnace apparatus of Claim 2 , Comprising:
The light receiving unit is formed in a tube shape having an inner wall surface, and contacts the heat medium inside to heat the heat medium, and the radiator is configured such that the light receiving unit is the heat medium in the light receiving unit. A solar furnace device, wherein the solar furnace device is connected to the other heat radiator formed on the inner side in contact with the inner wall surface of the light receiving unit .

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