JP2010040940A - Condensing photovoltaic power generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a condensing photovoltaic power generator which can output all the power generated and does not reduce photoelectric conversion efficiency. <P>SOLUTION: A photovoltaic power generation element 3 is arranged on a focus point of sunlight 1 reflected by a parabola reflecting plate 2. A heat radiation cooling arrangement 4 which takes heat from the photovoltaic power generation element 3 and radiates heat into air to cool down the photovoltaic power generation element 3, is arranged on and is in contact with the other side of a receiving side of the sunlight 1 reflected by the photovoltaic power generation element 3. The heat radiation cooling arrangement 4 includes a heat exchange part 5 which takes heat from the photovoltaic power generation element 3, a heat radiation part 6 which radiates heat into air and a heat transport means which transports heat between the heat exchange part 5 and the heat radiation part 6. More specifically, the heat radiation part 6 includes a cooling storage part 7, a radiation fin 8 which radiates heat transferred to the cooling storage part 7 into air, and a loop-type thermosiphon or heat pipe 11 which connects the cooling storage part 7 to the radiation fin 8 in a heat-transferable manner. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an apparatus that collects sunlight into a photovoltaic element and generates electric power by photoelectric conversion.

  2. Description of the Related Art Conventionally, a solar power generation technique that converts solar energy into electricity is known as an example of a power generation technique that can safely and reduce the burden on the environment. The energy source, sunlight, can be obtained semipermanently and has the advantage of not being costly.

  However, among the solar energy, in the photoelectric conversion unit that converts the solar energy into electricity, the solar energy that has not been converted into electricity is eventually converted into heat, and the temperature of the photoelectric conversion unit is increased, resulting in photoelectric conversion efficiency. There is a problem of lowering. In addition, since the energy density of solar energy is low, it is also concentrated to increase power generation efficiency. However, if the light is concentrated, the amount of heat per unit area increases, so the photoelectric conversion efficiency decreases due to temperature rise. It becomes a problem.

  Therefore, conventionally, it has been studied to increase the temperature of the photoelectric conversion unit without being converted to electricity and to reduce the amount of heat that decreases the photoelectric conversion efficiency. In other words, it has been studied to cool the photoelectric conversion unit. Examples thereof are described in Patent Documents 1 to 7.

  The photovoltaic power generation system described in Patent Document 1 stores solar energy that is converted into heat without being converted into electricity in a photoelectric conversion unit in a heat storage unit provided on the back surface of the solar cell element, and is used for thermoelectric conversion. By doing so, it is comprised so that the conversion efficiency of solar energy can be improved as the whole system, suppressing the temperature rise of a solar cell element. Therefore, since the temperature rise of a photoelectric conversion part can be suppressed, it is supposed that the conversion efficiency of solar energy improves as a whole system by suppressing the fall of conversion efficiency and combining thermoelectric conversion.

  The solar system, the solar system operating method, the program, and the recording medium described in Patent Document 2 are configured so that when the solar radiation panel temperature increases and the solar panel temperature rises, The heat storage material is moved using a pump between the first heat storage unit disposed on the back surface of the battery panel and the second heat storage unit that is not affected by solar energy and is insulated from the atmosphere. The temperature rise of the solar cell panel can be suppressed. Therefore, since the temperature rise of a solar cell panel can be controlled according to solar radiation intensity, it is supposed that the conversion efficiency of solar energy will improve by suppressing the fall of the conversion efficiency of solar energy.

  The power generation method and power generation apparatus using solar heat described in Patent Document 3 concentrate sunlight to increase solar energy density, heat the heat pipe using solar heat as a heat source, transfer heat to the Peltier element, and be heated. The Peltier element is configured to generate electricity. In other words, since solar power that is converted into heat, which is a problem when converting solar energy into electricity, is actively generated by thermoelectric conversion, a decrease in conversion efficiency due to heat can be avoided.

  The solar energy collector described in Patent Document 4 forms a heat pipe container with a sunlight transmissive material such as glass or plastic, encloses a solar energy power generation element together with a working fluid and a wick inside the container, In addition to converting solar energy into electricity, the solar energy converted into heat that reduces photoelectric conversion efficiency can be transported by heat. Therefore, when solar energy is converted into heat and the photoelectric conversion efficiency is reduced, heat can be transported quickly, and thus the reduction in photoelectric conversion efficiency can be suppressed.

  The solar energy conversion device described in Patent Document 5 forms on a translucent substrate a semiconductor thin film solar cell and a heat absorption layer that absorbs sunlight in a wavelength region that passes through the semiconductor thin film solar cell and converts it into heat. In addition, the heat generated by the heat absorption layer can be transported by heat pipes. Therefore, the conversion efficiency of the solar energy as the whole system can be improved.

  The solar heat pump system described in Patent Document 6 is a solar heat composed of a heat conduction plate or a heat pipe disposed on the back surface of the solar cell in order to suppress the temperature rise of the solar cell and to equalize the temperature of the solar cell. The conductive portion is connected to a refrigerant pipe through which the refrigerant flows so that heat can be transferred. For this reason, solar energy is converted into heat, a decrease in photoelectric conversion efficiency due to the heat is avoided, and the conversion efficiency of solar energy as the entire system can be improved.

  The solar battery heat collecting apparatus described in Patent Document 7 is configured such that a heat collecting apparatus including a heat pipe is disposed on the back surface of the solar battery, and the increase in the temperature of the solar battery can be transported by the heat pipe. Yes. Therefore, since the temperature rise of a solar cell can be suppressed, sunlight energy is converted into heat, the fall of the photoelectric conversion efficiency by the heat can be avoided, and the conversion efficiency of the solar energy as the whole system can be improved. It is said.

JP 2003-70273 A JP 2006-90659 A JP 2001-178163 A Japanese Patent Publication No. 58-53261 Japanese Examined Patent Publication No. 4-69438 JP 2005-195187 A JP 9-96451 A

  In each of the devices described in Patent Documents 1 to 7, when solar energy is converted into heat without being converted into electricity, and the temperature of the photoelectric conversion unit is raised, the refrigerant is supplied by a heat pipe or a pump. Heat is transported to the heat storage part using heat transporting means such as circulating, and the temperature rise of the photoelectric conversion part can be suppressed. However, the configuration in which the heat is not converted into electricity but is converted into heat and stored is effective for suppressing a decrease in conversion efficiency of solar energy irradiated to the system, but the photoelectric conversion unit is actively used. For example, in order to store heat, electric power is required as a power source for a pump for circulating the refrigerant, and a part of the generated electric power must be used for maintaining the system. In addition, a separate thermoelectric conversion device is required to convert the stored heat into electricity, which may complicate the system. Furthermore, when the stored heat is used as a heat source, an environment for using the stored heat and a heat transport means are separately required, and the system may also be complicated.

  This invention was made paying attention to said technical subject, and aims at providing the concentrating solar power generation device which can output all the generated electric power, and the structure was simplified. is there.

  In order to achieve the above object, the invention of claim 1 is directed to a concentrating solar power generation apparatus that condenses sunlight with a reflector and irradiates the photovoltaic element, and obtains electric power with the photovoltaic element. It is characterized by having an air heat radiation cooling mechanism that radiates heat into the atmosphere to store cold energy and cools the photovoltaic element with the accumulated cold heat.

  According to a second aspect of the present invention, in the first aspect of the invention, the air heat radiation cooling mechanism includes a heat exchanging unit that is brought into contact with the photovoltaic device and exchanges heat with the photovoltaic device, and an air that radiates heat to the atmosphere. It is characterized by including a middle heat radiating portion and heat transport means for transporting heat between the heat exchanging portion and the air heat radiating portion.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the air radiating section includes a cold storage section that stores cold heat, and a heat radiation fin that dissipates heat carried from the cold storage section into the atmosphere. It is characterized by this.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the cool storage unit is disposed on the opposite side of the reflector with respect to the center of curvature with respect to the photovoltaic element, and the heat transport means includes the cool storage unit And a heat siphon or a heat pipe that transports heat between the heat exchanger and the heat exchanger.

  According to a fifth aspect of the present invention, in the third aspect of the invention, the cold storage section is disposed on the back side of the reflector.

  According to a sixth aspect of the present invention, in the fifth aspect of the invention, the radiating fin is disposed on a surface of the cold storage portion opposite to the reflector, and the radiating fin and the cold storage portion are a thermosiphon or a heat pipe. It is characterized by being connected so that heat transfer is possible.

  The invention of claim 7 is the invention according to any one of claims 3 to 5, wherein the cold storage unit is a cold storage material, an internal fin disposed in a state embedded in the cold storage material, and an internal fin thereof And a thermosiphon or a heat pipe for connecting the heat dissipating fins so that heat can be transferred.

  The invention according to claim 8 is the invention according to any one of claims 3 to 7, wherein the cold storage unit diffuses and transfers the cold storage material and heat carried from the heat exchange unit to the entire cold storage material. And a heat diffusing plate.

  The invention according to claim 9 is the invention according to claim 2 or 3, wherein the heat transport means flows in a circulation path that connects the heat exchange part and the air heat dissipation part, and the inside of the circulation path. It includes a heat transport medium and a pump interposed in the middle of the circulation path and pressurizing and flowing the heat transport medium.

  The invention according to claim 10 is the invention according to any one of claims 3 to 5, wherein the cold storage unit is a cold storage material, a plurality of pipes arranged in a state embedded in the cold storage material, and A first header that communicates with one end of the pipe, a second header that communicates with the other end of the pipe, and a heat transport medium filled in each pipe and each header. And the heat transport means is configured to circulate and flow the heat transport medium between the heat exchanging section and each header and pipe.

  The invention of claim 11 is the invention of claim 10, further comprising an internal fin attached to the outer peripheral surface of each pipe and embedded in the heat storage material.

  According to a twelfth aspect of the present invention, in the invention according to the tenth or eleventh aspect, a loop-type thermometer in which a part of the regenerator material is penetrated and the other part is exposed to the atmosphere outside the regenerator part. A siphon or a heat pipe is further provided, and the heat radiating fin is attached to a portion of the thermo siphon or the heat pipe exposed to the atmosphere.

  According to the first aspect of the present invention, since an air heat radiation cooling mechanism is provided that radiates heat into the atmosphere to store cold energy and cools the photovoltaic element by the stored cold heat, it can store cold without using power, A decrease in photoelectric conversion efficiency due to heat can be suppressed or reduced.

  According to the invention of claim 2, in addition to the effect similar to the effect of the invention of claim 1, the air heat radiation cooling mechanism includes a heat exchanging part that exchanges heat in contact with the photovoltaic element, and heat radiation to the atmosphere. And a heat transporting means for transporting heat between the heat exchanging part and the air heat dissipating part. The aerial heat radiating part that contacts only the exchange part and dissipates the deprived heat can be arranged at a position that is hardly affected by the received sunlight or is not affected by the heat transporting means.

  According to the invention of claim 3, in addition to the effect similar to the effect of the invention of claim 1 or 2, the in-air heat dissipating part dissipates the heat transported from the cool storage part into the atmosphere. Since the heat dissipating fins are provided, the photovoltaic element is cooled by the cold storage heat, and the decrease in photoelectric conversion efficiency due to heat can be suppressed or reduced. Moreover, the cool storage to a cool storage part can be accelerated | stimulated with a radiation fin.

  According to the invention of claim 4, in addition to the same effect as that of the invention of claim 3, the cold accumulator is disposed on the opposite side of the reflecting plate with respect to the center of curvature than the photovoltaic device. Further, heat transport can be performed from the photovoltaic device to the cold storage unit through the heat exchange unit by a thermosiphon or a heat pipe as heat transport means. As a result, the photovoltaic device is cooled by the cold storage heat, and the decrease in photoelectric conversion efficiency due to heat can be suppressed or reduced.

  According to the invention of claim 5, in addition to the effect similar to the effect of the invention of claim 3, the cold storage part is arranged on the back side of the reflector that condenses sunlight. Difficult to receive or not affected by sunlight. As a result, it is possible to prevent or suppress the cold storage unit from being warmed by sunlight.

  According to the invention of claim 6, in addition to the same effect as that of the invention of claim 5, the heat radiating fins are arranged in the cold accumulator, and heat can be transferred between the cold accumulator and the radiating fins by a thermosiphon or a heat pipe. Therefore, it is possible to promote the cold storage to the cold storage unit by the radiating fins.

  According to the invention of claim 7, in addition to the same effect as that of any of the inventions of claims 3 to 5, the cold storage unit includes a cold storage material, an internal fin buried in the cold storage material, an internal fin, and a heat dissipation fin. Therefore, the heat transferred to the cool storage material is transferred from the internal fins to the radiating fins by the thermosiphon or heat pipe. Heat is released into the atmosphere. As a result, since heat does not stagnate inside the cold storage unit, cold storage in the cold storage unit can be promoted.

  According to the invention of claim 8, in addition to the effect similar to the effect of any one of claims 3 to 7, the heat is transferred from the heat exchanging part by taking the heat of the photovoltaic element inside the cold storage part. Since the heat diffusion plate for diffusing heat throughout the heat storage material is disposed, heat can be transmitted to the entire heat storage unit. As a result, since the heat transmitted to the cold storage unit does not stay locally, it is possible to promote the cooling of the photovoltaic element by the cold storage heat.

  According to the ninth aspect of the invention, in addition to the same effect as that of the second or third aspect of the invention, the heat transporting means connects the heat exchanging part and the air heat radiating part, and the circulation path. Since it is equipped with a heat transport medium that flows inside and a pump that pressurizes and flows the heat transport medium, the amount of heat transport medium that flows through the circulation path is controlled, so that cooling according to the temperature of the heat exchange section Can be done. In addition, since the heat transport medium is caused to flow by the pump, the air radiating portion can be freely arranged.

  According to the invention of claim 10, in addition to the effect similar to the effect of any one of the inventions of claims 3 to 5, the cold storage unit is provided with a plurality of the cold storage materials and the plurality of the cold storage materials arranged in the cold storage material. A pipe, a first header that communicates with one end of these pipes, a second header that communicates the other end of these pipes, and a heat transport medium within each of these pipes and each header. Filled, the heat transport means circulates and flows this heat transport medium between the heat exchange section, each header and each pipe, so that the heat transport medium takes heat from the photovoltaic device and is transferred from the heat exchange section. Heat can be transmitted to the cold storage unit.

  According to the invention of claim 11, in addition to the same effect as that of the invention of claim 10, the internal fins embedded in the heat storage material are provided on the outer peripheral surface of each pipe, so the internal fins The heat transferred by the heat transport medium can be transferred to the entire heat storage material as compared to the case without the heat transfer medium.

  According to the invention of claim 12, in addition to the effect similar to the effect of the invention of claim 10 or 11, a part of the loop type thermosiphon or the heat pipe penetrates the heat storage material and is exposed to other air. Since the heat radiating fins are attached to the part, the heat transferred to the heat storage material is transferred to the loop type thermosiphon or heat pipe, and from the heat radiating fin provided in the exposed part to the atmosphere Can dissipate heat. Moreover, since heat is radiated to the atmosphere by the thermosiphon or the heat pipe, it is possible to prevent or suppress the transfer of heat in the atmosphere to the heat storage material.

  Next, the present invention will be specifically described with reference to the drawings. A basic configuration example of a concentrating solar power generation device according to the present invention is schematically shown in FIG. A parabolic reflector 2 that reflects sunlight 1 is provided, and a photovoltaic element 3 is arranged at a position corresponding to the focal point. Further, on the side opposite to the light receiving surface that receives the reflected light of the photovoltaic element 3, heat that is converted into heat and raised to the temperature of the photovoltaic element 3 without being converted into electricity by contacting the photovoltaic element 3 An in-air heat radiation cooling mechanism 4 is disposed. Here, the air radiation cooling mechanism 4 may be configured to be able to cool by contacting the side opposite to the light receiving surface of the photovoltaic element 3 that receives reflected light. Therefore, the air radiation cooling mechanism 4 may be configured to be sandwiched between, for example, a pair of photovoltaic elements 3. An example of the configuration is schematically shown in FIG. The air heat radiation cooling mechanism 4 includes a heat exchanging portion 5 that receives heat generated in the photovoltaic device 3, heat transport means that performs heat transport, and an air heat radiation portion 6 that dissipates the heat transported heat to the atmosphere. It consists of and. The in-air heat dissipating unit 6 includes a cold accumulating unit 7 that stores cold heat, and heat dissipating fins 8 that dissipate heat transferred from the cold accumulating unit 7 into the atmosphere.

  Each of the concentrating solar power generation devices according to the present invention has the basic configuration shown in FIG. 1 or FIG. 2, and the embodiment will be specifically described below.

  In the example shown in FIG. 3, the photovoltaic element 3 arranged at the focal point of the sunlight 1 reflected by the parabolic reflector 2 is not converted into electricity but is converted into heat to raise the temperature of the photovoltaic element 3. The heat exchange part 5 which takes away the heat to warm was made to contact. The heat deprived by the heat exchanging section 5 is transferred to the in-air heat dissipating section 6 by the heat transport means, so that the photovoltaic device 3 is cooled.

  The heat transport means is composed of a loop-type thermosiphon or heat pipe 9, the evaporation portion of the loop-type thermosiphon or heat pipe 9 is used as a heat exchanging portion 5, and the condensing portion is in-air heat radiation having radiation fins 8. Part 6. Although not shown, the loop-type thermosiphon or heat pipe 9 is a container made of copper or copper alloy, in which a non-condensable gas is degassed and a volatile working fluid is sealed under reduced pressure. It is sealed. Moreover, you may enclose the porous material using capillary phenomena, such as a wick which recirculate | circulates a working fluid. For the working fluid, water or alcohol is used in consideration of the freezing point and boiling point.

  When the photovoltaic device 3 receives the reflected light and a part of the reflected light is converted into heat, the temperature of the photovoltaic device 3 rises due to the heat. The heat generated in the photovoltaic device 3 is transferred to the heat exchanging portion 5 that contacts the photovoltaic device 3, that is, the evaporation portion of the loop type thermosiphon or the heat pipe 9, where the working fluid evaporates. The heat is taken away by the working fluid. The working fluid deprived of heat generated in the photovoltaic element 3 is moved to the air radiation part 6 having the radiation fins 8, that is, the condensation part. The heat transferred to the condensing part by the vaporized working fluid is transferred to the heat radiating fins 8 and is radiated from the heat radiating fins 8 to the atmosphere. At this time, in the condensing unit, the vaporized working fluid is recondensed by depriving of heat, and is returned to the evaporating unit by natural dripping or capillary action. By repeating this, the heat generated in the photovoltaic element 3 is radiated into the atmosphere by the radiation fins 8 so that the photovoltaic element 3 is cooled.

  Thus, since the photovoltaic device 3 is cooled, it can prevent or suppress that photoelectric conversion efficiency falls with a heat | fever, and the photovoltaic power generation with the stable electromotive force can be performed. Further, since no power is used for cooling the photovoltaic device 3 and no power is used for maintaining the system, all the generated power can be output.

  In the example shown in FIG. 4, the photovoltaic device 3 is disposed at the focal point of the sunlight 1 reflected by the parabolic reflector 2, and the photovoltaic device 3 is disposed on the opposite side of the photovoltaic device 3 from the light receiving surface of the reflected light. It arrange | positions in contact with the heat exchange part 5 which takes away the produced | generated heat. The heat deprived by the heat exchanging unit 5 is transferred to the cold storage unit 7 disposed on the back side of the parabolic reflector 2 by the heat transport means, so that the photovoltaic device 3 is cooled. . The heat transport means is composed of a loop heat pipe 9, the evaporation part of the loop heat pipe 9 is a heat exchanging part 5 in contact with the photovoltaic element 3, and the condensing part is an air radiating part having a cold storage part 7. It is set to 6. The heat exchanging part 5 and the in-air heat radiating part 6 are connected so as to be able to transfer heat by a loop heat pipe 9 as a heat transport means. That is, the photovoltaic device 3 is cooled by the in-air heat radiating section 6 connected so as to be able to transfer heat. In FIG. 4, (a) is a perspective view, (b) is a side view, (c) is a rear view, and (d) is a partially enlarged view.

  The photovoltaic element 3 is disposed on the opposite side of the parabolic reflector 2 with the heat exchange part 5 interposed therebetween. The heat exchanging part 5 is in contact with the heat diffusing plate 10 for diffusing heat generated in the photovoltaic element 3 and the heat diffusing plate 10, and the heat receiving part of the loop type heat pipe 9 as heat transport means, that is, the loop type heat. The evaporating unit evaporates the working fluid enclosed in the pipe 9. A loop-type heat pipe 9 serving as a heat transport means encloses a porous material that generates a capillary force such as a wick that circulates the working fluid. Radiation to dissipate heat transferred to the cool storage unit 7 by the loop heat pipe 9 to the atmosphere on the surface of the cool storage unit 7 arranged on the back side of the parabola reflector 2 opposite to the parabola reflector 2 Fins 8 are arranged. The cold storage unit 7 and the heat radiating fins 8 are connected by a loop heat pipe 11 so that heat can be transferred.

  The cold storage unit 7 to which heat generated in the photovoltaic device 3 is transferred is filled with a cold storage material 12 that stores cold heat. The cold storage unit 7 is in contact with the condensing part of the loop heat pipe 9 and is directed toward the end of the parabolic reflector 2 in order to uniformly disperse the heat transferred by the heat transport means to the cold storage material 12. The heat storage plate 14 for the cold storage unit that contacts the condensing part of the plurality of L-shaped heat pipes 13 that perform heat transport and the loop type heat pipe 9 and diffuses heat throughout the cold storage material 12, and for the cold storage part The inner fin 15 is provided in contact with the heat diffusion plate 14. The internal fins 15 and the radiating fins 8 disposed on the surface of the cold storage unit 7 on the side opposite to the parabolic reflector 2 are connected by a loop heat pipe 11 so that heat can be transferred. The heat transferred from the regenerator 7 to the heat radiation fin 8 by the loop heat pipe 11 is configured to be radiated from the heat radiation fin 8 to the atmosphere. The schematic is shown in FIG. 5A is a simplified internal structure diagram of the second embodiment, FIG. 5B is a perspective view, FIG. 5C is a partially enlarged view of the internal structure, and FIG. 5D is a cross-sectional view. is there.

  When the photovoltaic device 3 receives the reflected light, and a part of the reflected light is converted into heat, and the temperature of the photovoltaic device 3 rises, the heat is in contact with the heat exchanging portion 5, that is, the thermal diffusion plate 10. Heat is transferred to the evaporation part of the loop heat pipe 9 and the working fluid enclosed in the loop heat pipe 9 is vaporized, so that heat generated in the photovoltaic element 3 is taken away. The vaporized working fluid is moved to the condensing part of the loop heat pipe 9 buried in the cold storage material 12. In the condensing part, the heat transferred by the vaporized working fluid is deprived by the plurality of L-shaped heat pipes 13 and the heat diffusion plate 14 for the regenerator part that transmit the heat to the entire regenerator material 12. The fluid is condensed. The heat transferred to the cold storage unit heat diffusion plate 14 is transferred from the internal fins 15 provided on the surface thereof to the radiating fins 8 disposed on the surface of the cold storage unit 7 by the loop heat pipe 11. Radiated into the atmosphere. By repeating this, the heat generated in the photovoltaic element 3 is radiated into the atmosphere, and the photovoltaic element 3 is cooled.

  Thus, since the photovoltaic device 3 is cooled, it can prevent or suppress that photoelectric conversion efficiency falls with a heat | fever, and the photovoltaic power generation with the stable electromotive force can be performed. Further, since no power is used for cooling the photovoltaic device 3 and no power is used for maintaining the system, all the generated power can be output. Furthermore, not only the heat generated in the photovoltaic device 3 is taken away by the air heat radiation cooling mechanism 4, but also when the outside air temperature, for example, at night, falls below the temperature of the cold storage section 7, the cold storage material is discharged from the heat radiation fins 8. The heat of 12 is deprived and cold energy is stored in the cold storage material 12. The stored cold storage heat is used for cooling the photovoltaic element 3 during solar power generation during the daytime, and can accelerate the cooling of the photovoltaic element 3.

  In the example shown in FIG. 6, the photovoltaic element 3 is arranged at the focal point of the sunlight 1 reflected by the parabolic reflector 2, and the photovoltaic element 3 is disposed on the opposite side of the photovoltaic element 3 from the light receiving surface of the reflected light. The heat exchanging part 5 that takes away the generated heat is arranged in contact with the photovoltaic element 3. The heat generated in the photovoltaic element 3 taken away by the heat exchanging unit 5 is transferred to the in-air heat radiating unit 6 by the heat transport means so that the photovoltaic element 3 can be cooled. The air radiating portion 6 is disposed on the back side of the parabolic reflector 2. The heat transport means is composed of a loop type heat pipe 9, the evaporation part of the loop type heat pipe 9 is used as a heat exchanging part 5 in contact with the photovoltaic device 3, and the condensing part is connected so that heat can be transferred by the heat transport means. The air radiating portion 6 is provided.

  The photovoltaic element 3 is disposed at the focal point of the sunlight 1 reflected by the parabolic reflector 2. The heat transport means is composed of a loop heat pipe 9. The heat exchanging unit 5 is disposed in contact with the photovoltaic element 3 on the side opposite to the light receiving surface of the photovoltaic element 3. The heat exchanging unit 5 includes a heat diffusion plate 10 that diffuses the heat generated in the photovoltaic device 3 provided between the heat transporting device and the photovoltaic device 3 by contacting the photovoltaic device 3, and as a heat transporting device. The heat receiving part of the loop type heat pipe 9, that is, the evaporation part for evaporating the working fluid enclosed in the inside of the loop type heat pipe 9. A loop-type heat pipe 9 that is a heat transport means encloses a porous material such as a wick that recirculates the working fluid by capillary force. The air radiating portion 6 is disposed on the back side of the parabolic reflector 2 and has a plurality of radiating fins 8 for radiating heat transferred to the cold storage portion 7 and the cold storage portion 7 into the atmosphere, It is composed of a plurality of loop-type thermosiphons or heat pipes 16 that connect the radiating fins 8 so that heat can be transferred. The cold storage part 7 which is the in-air heat radiation part 6 to which the heat generated in the photovoltaic element 3 is transferred is filled with a cold storage material 12 that stores cold heat. Further, the cold storage unit 7 is in contact with the condensing unit of the loop type heat pipe 9 in order to uniformly disperse the heat transferred by the heat transporting means into the filled cold storage material 12, and the end of the parabolic reflector 2 A heat storage plate 14 for the cold storage section that is curved in accordance with the shape of the parabolic reflector 2 toward the surface is buried in the cold storage material 12. The heat storage plate 14 for the cold storage unit is disposed so as to be in contact with the loop heat pipe 9 so that heat can be transferred. The plurality of loop-type thermosiphons or heat pipes 16 are curved in accordance with the shape of the parabolic reflector 2, and are arranged in contact with the whole or a part of the heat storage plate 14 for heat storage so that heat can be transferred. The plurality of radiating fins 8 are arranged at the edge of the parabolic reflector 2. The loop heat pipe 9 is filled with a porous material that generates a capillary force such as a wick that recirculates the working fluid.

  When the photovoltaic device 3 receives the reflected light, and a part of the reflected light is converted into heat and the temperature of the photovoltaic device 3 rises, the heat that is placed in contact with the photovoltaic device 3 and takes away the heat. Heat is transferred to the exchange unit 5, that is, to the heat diffusion plate 10 and the evaporation unit of the loop heat pipe 9. When the heat generated in the photovoltaic element 3 is transferred to the loop heat pipe 9, the working fluid sealed in the inside is vaporized, and the heat generated in the photovoltaic element 3 is taken away, and the vaporized operation is performed. The fluid is moved to the condensing part of the loop heat pipe 9 buried in the cold storage material 12. In the condensing unit, the heat transferred by the vaporized working fluid is taken away by the cool storage material 12 and the cool storage unit heat diffusion plate 14 that diffuses the heat therein, and the working fluid is condensed. The heat transmitted to the cold storage unit heat diffusion plate 14 is arranged at the edge of the parabolic reflector 2 from a plurality of loop-type thermosiphons or heat pipes 16 that are in contact with the cold storage unit heat diffusion plate 14 so that heat can be transferred. The heat is transferred to the plurality of radiating fins 8 and is radiated from the radiating fins 8 to the atmosphere. By repeating this, the heat generated in the photovoltaic element 3 is radiated into the atmosphere, and the photovoltaic element 3 is cooled.

  Thus, since the photovoltaic device 3 is cooled, it can prevent or suppress that photoelectric conversion efficiency falls with a heat | fever, and the photovoltaic power generation with the stable electromotive force can be performed. Further, since no power is used for cooling the photovoltaic device 3 and no power is used for maintaining the system, all the generated power can be output. Furthermore, not only the heat generated in the photovoltaic device 3 is taken away by the air heat radiation cooling mechanism 4, but also when the outside air temperature, for example, at night, falls below the temperature of the cold storage section 7, the cold storage material is discharged from the heat radiation fins 8. The heat of 12 is deprived and cold energy is stored in the cold storage material 12. The stored cold storage heat is used for cooling the photovoltaic element 3 during solar power generation during the daytime, and can accelerate the cooling of the photovoltaic element 3.

  In the example shown in FIG. 7, the photovoltaic device 3 is arranged at the focal point of the sunlight 1 reflected by the parabolic reflector 2, and the cool storage unit 7 of the air heat radiation cooling mechanism 4 is vertically above the photovoltaic device 3. Is arranged. On the side opposite to the light receiving surface of the reflected light of the photovoltaic element 3, a heat exchanging part 5 that takes away the heat generated in the photovoltaic element 3 is arranged in contact with the photovoltaic element 3. The heat generated in the photovoltaic element 3 taken away by the heat exchanging unit 5 is transferred to the in-air heat radiating unit 6 by the heat transporting means so as to be cooled. The heat transport means is composed of a loop type thermosiphon or heat pipe 9, the evaporation part of the loop type thermosiphon or heat pipe 9 is the heat exchanging part 5 in contact with the photovoltaic device 3, and the condensing part is heat transported It is set as the air radiation | emission part 6 connected so that heat transfer was possible by the means.

  The photovoltaic element 3 is disposed at the focal point of the sunlight 1 reflected by the parabolic reflector 2. The heat transport means is composed of a loop type thermosiphon or a heat pipe 9. The heat exchanging unit 5 comes into contact with the photovoltaic element 3 and a working fluid sealed in a loop-type thermosiphon or heat pipe 9 that transports heat generated in the photovoltaic element 3 to the air radiating unit 6. It is comprised from the evaporation part to evaporate. The air radiation unit 6 includes a cold storage unit 7 that stores cold heat, a heat radiation fin 8 that radiates heat transferred from the cold storage unit 7 to the atmosphere, and a loop thermosiphon that transports heat from the cold storage unit 7 to the heat radiation fin 8. Alternatively, the heat pipe 11 is used. Further, the heat transport means for transporting heat generated in the photovoltaic device 3 to the air radiating section 6 is branched into a plurality of pipes 18 embedded in the cold storage section 7 by the header 17 at one end of the cold storage section 7. It is configured to be converged by the header 19 at the other end. On the outer peripheral side of the plurality of branched pipes 18, internal fins 15 that are in contact with the plurality of pipes 18 so as to be able to transfer heat are provided, and the cold storage unit 7 is filled with the heat transferred by the heat transport means. The material 12 can be diffused. The radiating fins 8 are arranged on the surface of the cold storage unit 7 on the side opposite to the parabolic reflector 2. The heat dissipating fins 8 and the cool storage unit 7 are connected to each other by a loop thermosiphon or a heat pipe 11 so that heat can be transferred, and the heat transferred to the cool storage unit 7 can be dissipated from the heat dissipating fins 8 to the atmosphere. . The internal fins 15 are in contact with a loop-type thermosiphon or heat pipe 11 that transfers the heat transferred to the cold storage unit 7 to the radiating fins 8 so as to be able to transfer heat. The schematic diagram is shown in FIG. 8, (a) is a schematic diagram of the example shown above, (b) is a side view. FIG. 9 shows a part of the internal structure of the example shown in FIG. 8, (a) is a perspective view of the cold storage unit 7, and (b) is a perspective view of the air heat dissipation unit 6.

  When the photovoltaic device 3 receives the reflected light, and a part of the reflected light is converted into heat, and the temperature of the photovoltaic device 3 rises, the heat is exchanged with the heat exchange unit 5 in contact with the photovoltaic device 3, that is, Heat is transferred to the evaporation part of the loop type thermosiphon or heat pipe 9. When the heat generated in the photovoltaic device 3 is transferred to the loop thermosiphon or the heat pipe 9, the working fluid enclosed in the inside is vaporized, and the heat generated in the photovoltaic device 3 is taken away and vaporized. The working fluid thus transferred is moved to the condensing part of the loop type thermosiphon or heat pipe 9 buried in the cold storage material 12. When heat is transferred to the cool storage unit 7 filled with the cool storage material 12 constituting the in-air heat dissipation unit 6, the heat is transferred to the cool storage material 12 in the loop type thermosiphon or the condensation part of the heat pipe 9. Heat is further transferred to the internal fins 15 to be diffused inside the cold accumulator 7, and the working fluid is condensed. The heat transferred to the cold storage unit 7 is arranged on the surface of the cold storage unit 7 by a loop type thermosiphon or heat pipe 11 that is brought into contact with the internal fins 15 that are buried in the cold storage unit 7 so as to be able to transfer heat. Heat is transferred to the radiating fins 8 and radiated to the atmosphere. By repeating this, the heat generated in the photovoltaic element 3 is radiated into the atmosphere, and the photovoltaic element 3 is cooled.

  Thus, since the photovoltaic device 3 is cooled, it can prevent or suppress that photoelectric conversion efficiency falls with a heat | fever, and the photovoltaic power generation with the stable electromotive force can be performed. Further, since no power is used for cooling the photovoltaic device 3 and no power is used for maintaining the system, all the generated power can be output. Furthermore, not only the heat generated in the photovoltaic device 3 is taken away by the air heat radiation cooling mechanism 4, but also when the outside air temperature, for example, at night, falls below the temperature of the cold storage section 7, the cold storage material is discharged from the heat radiation fins 8. The heat of 12 is deprived and cold energy is stored in the cold storage material 12. The stored cold storage heat is used for cooling the photovoltaic element 3 during solar power generation during the daytime, and can accelerate the cooling of the photovoltaic element 3.

  In the example shown in FIG. 10, the photovoltaic element 3 is arranged at the focal point of the sunlight 1 reflected by the parabolic reflector 2, and the photovoltaic element 3 is disposed on the opposite side of the photovoltaic element 3 from the light receiving surface of the reflected light. A heat exchanging section 5 that takes away the generated heat is disposed in contact with the photovoltaic element 3. The heat generated in the photovoltaic device 3 taken away by the heat exchange unit 5 is transferred to the heat transport medium 21 filled in the circulation path 20. The heat transport medium 21 to which the heat generated in the photovoltaic device 3 is transferred is configured to be flowed by the pump 22 to the air radiating portion 6 disposed on the back side of the parabolic reflector 2.

  The photovoltaic element 3 is disposed at the focal point of the sunlight 1 reflected by the parabolic reflector 2, and is generated in the photovoltaic element 3 by contacting the photovoltaic element 3 on the side opposite to the light receiving surface of the photovoltaic element 3. A heat exchanging section 5 that takes away the heat is disposed. In addition, a cold storage unit 7 is disposed on the back side of the parabolic reflector 2. Furthermore, the heat exchange unit 5 and the cold storage unit 7 are connected by a circulation path 20. The circulation path 20 is filled with a flowing heat transport medium 21. The heat transport medium 21 is configured to be pressurized and flowed by a pump 22 interposed in the middle of the circulation path 20 so that heat can be transported between the heat exchange unit 5 and the cold storage unit 7. The pump 22 that pressurizes and flows the heat transport medium 21 is configured to be driven by electric power generated by solar power generation. The circulation path 20 through which the heat transport medium 21 that transmits the heat generated in the photovoltaic device 3 circulates is a plurality of pipes 18 embedded in the cold storage material 12 filled in the cold storage section 7 by the header 17 at one end of the cold storage section 7. And is converged by the header 19 at the other end. Inner fins 15 that are in contact with the plurality of pipes 18 so as to be able to transfer heat are provided on the outer peripheral side of the plurality of branched pipes 18 so that the transmitted heat can be diffused to the regenerator material 12. . The schematic is shown in FIG. 11A is a schematic diagram of the example shown above, FIG. 11B is a partial enlarged view of the photovoltaic element 3 and the heat exchange unit 5, and FIG. 11C is a perspective view of the cold storage unit 7. Yes, (d) is a cross-sectional view of the cold storage section 7.

  When the photovoltaic device 3 receives the reflected light, and a part of the reflected light is converted into heat and the temperature of the photovoltaic device 3 rises, the heat is in contact with the heat exchanging part 5, that is, inside the circulation path 20. The heat is transferred to the heat transport medium 21 filled in the container. The heat transport medium 21 deprived of the heat generated in the photovoltaic device 3 is pressurized and flowed by the pump 22 and flows to the air radiation unit 6. When the heat transport medium 21 flows into the cold storage section 7 constituting the air heat dissipation section 6, the circulation path 20 through which the heat transport medium 21 is circulated is branched from the header 17 at one end into a plurality of pipes 18, and the plurality The heat stored in the heat transport medium 21 is taken away by the regenerator 12 by the pipe 18 and the internal fins 15 arranged in contact with the outer peripheral sides of the plurality of pipes 18. The plurality of pipes 18 that flow the heat transport medium 21 deprived of heat by the cold storage material 12 are converged by the header 19 at the other end, and the heat transport medium 21 flows again to the heat exchanging unit 5. By repeating this, the heat generated in the photovoltaic device 3 is transferred by the heat transport medium 21 and is taken away by the cold storage heat stored in the cold storage unit 7 so that the photovoltaic device 3 is cooled. Has been.

  Thus, since the photovoltaic device 3 is cooled, it can prevent or suppress that photoelectric conversion efficiency falls with a heat | fever, and the photovoltaic power generation with the stable electromotive force can be performed. Further, not only the heat generated in the photovoltaic device 3 is taken away by the air heat radiation cooling mechanism 4, but also, for example, when the outside air temperature such as at night falls below the temperature of the cold storage unit 7, the cold storage material is transferred from the heat exchange unit 5. The heat of 12 is deprived and cold energy is stored in the cold storage material 12. The stored cold storage heat is used for cooling the photovoltaic element 3 during solar power generation during the daytime, and can accelerate the cooling of the photovoltaic element 3.

  In the example shown in FIG. 12, the photovoltaic device 3 is disposed at the focal point of the sunlight 1 reflected by the parabolic reflector 2, and the photovoltaic device 3 is disposed on the opposite side of the photovoltaic device 3 from the light receiving surface of the reflected light. A heat exchanging section 5 that takes away the generated heat is disposed in contact with the photovoltaic element 3. The heat generated in the photovoltaic device 3 taken away by the heat exchange unit 5 is transferred to the heat transport medium 21 filled in the circulation path 20. The heat transport medium 21 that transfers the heat generated in the photovoltaic element 3 is configured to flow to the air radiating portion 6 disposed on the back side of the parabolic reflector 2 by the pump 22.

  The photovoltaic element 3 is disposed at the focal point of the sunlight 1 reflected by the parabolic reflector 2, and the photovoltaic element 3 is brought into contact with the photovoltaic element 3 so that heat can be transferred to the opposite side of the light receiving surface of the photovoltaic element 3 to exchange heat. Part 5 is arranged. In addition, an air radiating portion 6 is arranged on the back side of the parabolic reflector 2. The air radiating unit 6 includes a cold storage unit 7 that stores cold heat, a radiating fin 8 that radiates heat transferred from the cold storage unit 7 to the atmosphere, and a loop type that transports heat transferred to the cold storage unit 7 to the radiating fin 8. Thermosiphon or heat pipe 11. Furthermore, the heat exchange unit 5 and the cold storage unit 7 are connected by a circulation path 20, and a heat transport medium 21 that can flow is filled in the circulation path 20. A pump 22 that pressurizes and flows the heat transport medium 21 is interposed in the circulation path 20. The pump 22 that pressurizes and flows the heat transport medium 21 is configured to be driven by electric power generated by solar power generation. The cold storage unit 7 is filled with a cold storage material 12 that stores cold heat. The circulation path 20 for circulating the heat transport medium 21 that transmits heat generated in the photovoltaic device 3 is branched into a plurality of pipes 18 embedded in the cool storage material 12 by the header 17 at one end of the cool storage section 7, and It is configured to be converged by the header 19. On the outer peripheral side of the plurality of branched pipes 18, internal fins 15 that are in contact with the plurality of pipes 18 so as to be able to transfer heat and diffuse the transmitted heat to the cold storage material 12 are arranged. A schematic diagram thereof is shown in FIG. 13A is a schematic diagram of the sixth embodiment, FIG. 13B is a perspective view of the cold storage unit 7, FIG. 13C is a perspective view of the air heat radiation unit 6, and FIG. FIG.

  When the photovoltaic device 3 receives the reflected light, and a part of the reflected light is converted into heat and the temperature of the photovoltaic device 3 rises, the heat is in contact with the heat exchanging part 5, that is, inside the circulation path 20. The heat is transferred to the heat transport medium 21 filled in the container. The heat transport medium 21 deprived of the heat generated in the photovoltaic device 3 is pressurized and flowed by the pump 22 and flows to the air radiation unit 6 constituted by the cold storage unit 7. When the heat transport medium 21 flows into the cold storage unit 7 constituting the air heat radiation unit 6, the circulation path 20 through which the heat transport medium 21 is circulated is branched from the header into a plurality of pipes 18, and the plurality of pipes 18. And the heat transferred by the heat transport medium 21 is taken away by the cold storage material 12 by the internal fins 15 arranged in contact with the outer peripheral side of the plurality of pipes 18. The plurality of pipes 18 filled with the heat transport medium 21 deprived of heat from the cold storage material 12 are converged by the header 19 at the other end, and the heat transport medium 21 flows again to the heat exchange unit 5. The heat transferred to the cold storage unit 7 is arranged on the surface of the cold storage unit 7 by a loop-type thermosiphon or heat pipe 11 that is brought into contact with the internal fins 15 that are buried and arranged in the inside thereof. The heat is transferred to the radiating fin 8 and radiated to the atmosphere. By repeating this, the heat generated in the photovoltaic element 3 is taken away by the heat transport medium 21 and the cold storage heat, and the photovoltaic element 3 is cooled.

  Thus, since the photovoltaic device 3 is cooled, it can prevent or suppress that photoelectric conversion efficiency falls with a heat | fever, and the photovoltaic power generation with the stable electromotive force can be performed. Further, not only the heat generated in the photovoltaic device 3 is taken away by the air heat radiation cooling mechanism 4 but also, for example, when the outside air temperature at night falls below the temperature of the cold storage section 7, the cold storage material 12 The heat is deprived and cold energy is stored in the cold storage material 12. The stored cold storage heat is used for cooling the photovoltaic element 3 during solar power generation during the daytime, and can accelerate the cooling of the photovoltaic element 3.

  In the example shown in FIG. 14, a solar power plant is configured by combining and connecting any one or several of the concentrating solar power generation devices of each example described above. Said solar power plant should just increase / decrease the number of concentrating solar power generation devices to connect according to the electric power to output. In addition, since each concentrating solar power generation device can be configured to be electrically or thermally independent, for example, when some concentrating solar power generation devices fail, other concentrating solar power generation devices The influence on the power generation device can be prevented.

  In addition, since the concentrating solar power generation device according to the present invention condenses sunlight 1 to generate electric power, it is possible to suppress the usage amount of the photovoltaic element 3 that performs photoelectric conversion, and to reduce the equipment cost. Can be planned. Moreover, the concentrating solar power generation device according to the present invention can be configured not to require electric power for cooling the photovoltaic device 3 or maintaining the system, and can reduce the power generation cost. As a result, it is possible to output all the generated power. Furthermore, since carbon dioxide is not generated during power generation, the load on the environment can be reduced.

It is a figure which shows the basic structural example of the concentrating solar power generation device which concerns on this invention. It is a figure which shows the other basic structural example of the concentrating solar power generation device which concerns on this invention. It is the schematic which shows an example of the concentrating solar power generation device which concerns on this invention. It is the schematic which shows the other example of the concentrating solar power generation device which concerns on this invention. FIG. 6 is a schematic diagram showing the internal structure of Example 2. It is the schematic which shows the further another example of the concentrating solar power generation device which concerns on this invention. It is the schematic which shows the further another example of the concentrating solar power generation device which concerns on this invention. It is the schematic which shows the further another example of the concentrating solar power generation device which concerns on this invention. It is the schematic which shows the internal structure of the example shown in FIG. It is a figure which shows the basic structural example at the time of circulating a heat transport medium using a pump in the concentrating solar power generation device which concerns on this invention. It is the schematic which shows an example at the time of circulating a heat transport medium using a pump in the concentrating solar power generation device which concerns on this invention. In the concentrating solar power generation device according to the present invention, it is a diagram showing another basic configuration example when a heat transport medium is circulated using a pump. It is the schematic which shows another example at the time of circulating a heat transport medium using a pump in the concentrating solar power generation device which concerns on this invention. It is a structural example of the solar power plant using the concentrating solar power generation device which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Parabolic reflector, 3 ... Photoelectric power generation element, 4 ... Air heat radiation cooling mechanism, 5 ... Heat exchange part, 6 ... Air heat radiation part, 7 ... Cold storage part, 8 ... Radiation fin, 14 ... Thermal diffusion for cold storage part Plate, 15 ... internal fin, 20 ... circulation path, 22 ... pump.

Claims (12)

In a concentrating solar power generation device that collects sunlight by a reflector and irradiates the photovoltaic device, and obtains electric power by the photovoltaic device,
A concentrating solar power generation apparatus comprising an air heat radiation cooling mechanism that radiates heat into the atmosphere to store cold energy and cools the photovoltaic element with the stored cold heat.   The air heat radiation cooling mechanism includes a heat exchange part that is brought into contact with the photovoltaic element and exchanges heat with the photovoltaic element, an air radiation part that radiates heat to the atmosphere, and the heat exchange part and the air radiation part. 2. The concentrating solar power generation device according to claim 1, further comprising:   3. The concentrating solar according to claim 1, wherein the air heat dissipating unit includes a cold accumulating unit that stores cold heat, and a heat dissipating fin that dissipates heat carried from the cold accumulating unit into the atmosphere. Photovoltaic generator.   The cold accumulator is disposed on the opposite side of the reflector with respect to the center of curvature than the photovoltaic element, and the heat transport means transports heat between the cold accumulator and the heat exchange unit. Alternatively, the concentrating solar power generation device according to claim 3, wherein the concentrating solar power generation device is configured by a heat pipe.   The concentrating solar power generation device according to claim 3, wherein the cold storage unit is disposed on a back side of the reflector.   The radiating fin is disposed on a surface of the cold storage unit opposite to the reflector, and the radiating fin and the cold storage unit are connected so as to be able to transfer heat by a thermosiphon or a heat pipe. The concentrating solar power generation device according to claim 5.   The cold storage unit includes a cold storage material, an internal fin disposed in a state of being buried in the cold storage material, and a thermosiphon or a heat pipe that connects the internal fin and the heat dissipation fin so as to be able to transfer heat. The concentrating solar power generation device according to claim 3, wherein the concentrating solar power generation device is provided.   The said cool storage part is equipped with the cool storage material and the thermal diffusion plate which diffuses and transfers the heat carried from the said heat exchange part to the whole said cool storage material, The any one of Claim 3 thru | or 7 characterized by the above-mentioned. A concentrating solar power generation device according to claim 1.   The heat transport means includes a circulation path that connects the heat exchanging section and the air heat dissipation section, a heat transport medium that flows inside the circulation path, and a heat transport medium that is interposed in the middle of the circulation path. The concentrating solar power generation device according to claim 2, further comprising a pump that pressurizes and flows the medium. The cold storage unit includes a cold storage material, a plurality of pipes arranged in a state embedded in the cold storage material, a first header communicating one end of the pipes, and the other end of the pipe A second header in communication with each other, and a heat transport medium filled in each of these pipes and each header,
The said heat transport means is comprised so that the said heat transport medium may circulate and flow between the said heat exchange part, each header, and a pipe, The collection in any one of Claim 3 thru | or 5 characterized by the above-mentioned. Optical solar power generator.   The concentrating solar power generation device according to claim 10, further comprising an internal fin attached to an outer peripheral surface of each pipe and embedded in the heat storage material. A loop-type thermosiphon or heat pipe, part of which penetrates the cold storage material and the other part of which is exposed to the atmosphere outside the cold storage unit;
The concentrating solar power generation device according to claim 10 or 11, wherein the heat radiation fin is attached to a portion of the thermosiphon or heat pipe exposed to the atmosphere.

Images