WO2024105954A1 - Dispositif de production d'énergie thermoélectrique - Google Patents

Dispositif de production d'énergie thermoélectrique Download PDF

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Publication number
WO2024105954A1
WO2024105954A1 PCT/JP2023/030151 JP2023030151W WO2024105954A1 WO 2024105954 A1 WO2024105954 A1 WO 2024105954A1 JP 2023030151 W JP2023030151 W JP 2023030151W WO 2024105954 A1 WO2024105954 A1 WO 2024105954A1
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Prior art keywords
heat
storage body
heat storage
temperature
conversion unit
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PCT/JP2023/030151
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English (en)
Japanese (ja)
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忠司 中沼
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陽力熱電株式会社
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Publication of WO2024105954A1 publication Critical patent/WO2024105954A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/75—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with conical reflective surfaces
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means

Definitions

  • the present invention relates to a thermoelectric power generation device that generates electricity by converting thermal energy taken in from the outside into electrical energy using a thermoelectric conversion unit.
  • Patent Document 1 describes a thermoelectric power generation device that includes a heat conductor that is in contact with the environment and can exchange heat with the environment in response to changes in temperature of the environment, a heat storage body, a thermoelectric conversion unit arranged between the heat conductor and the heat storage body, a heat flow regulating unit that is arranged between a pair of the heat conductor and the thermoelectric conversion unit or between a pair of the thermoelectric conversion unit and the heat storage body and controls the heat transfer between the pair, and a coating layer that has a certain degree of thermal insulation and covers the heat storage body, and that utilizes the temperature difference that occurs between the heat conductor and the heat storage body to extract electrical energy from the thermoelectric conversion unit.
  • thermoelectric generator If this thermoelectric generator is placed, for example, outdoors where the temperature changes periodically between day and night, the temperature of the heat conductor will change with the daily temperature changes, and the temperature of the heat storage body will also change accordingly. At this time, the heat flow adjustment unit operates to create a certain degree of delay between the temperature change of the heat conductor and the temperature change of the heat storage body.
  • phase difference is created between the temperature change cycle of the heat conductor and the temperature change cycle of the heat storage body, and this phase difference maintains the temperature difference required for power generation between the heat conductor and the heat storage body throughout the day, generating power twice a day, when the temperature of the heat conductor rises and when the temperature of the heat conductor falls.
  • thermoelectric generator when used as a power source for electronic devices such as wireless sensors and remote monitors, an independent power source is obtained, eliminating the need for power lines from a commercial power source to the electronic devices or the need to replace batteries, allowing these electronic devices to be installed freely wherever they are needed.
  • thermoelectric power generation device heat stored in the heat storage body when the temperature rises during the day is released from the heat storage body when the temperature falls during the same day, and power is generated according to the temperature difference with the heat conductor that occurs during this time. Therefore, although it can supply the relatively small amount of power required to operate low-power electronic devices, it cannot supply larger amounts of power, such as the daily power consumption of an average household.
  • thermoelectric power generation device depending on the installation location of the thermoelectric power generation device or the type of heat source, the heat conductor may be heated to a high temperature exceeding the guaranteed operating temperature of the thermoelectric conversion unit.
  • the thermoelectric conversion unit receives heat directly from the heat conductor via the heat flow adjustment unit, causing the thermoelectric conversion unit to be heated above its guaranteed operating temperature, resulting in the problem that the thermoelectric conversion unit becomes inoperable or breaks down.
  • the objective of the present invention is therefore to provide a thermoelectric power generation device that can supply greater power more stably.
  • thermoelectric power generation device includes a heat collector that takes in heat from a heat source, a first heat storage body in thermal contact with the heat collector, a thermoelectric conversion unit having one end and the other end, a temperature adjustment unit that is disposed between the first heat storage body and the one end of the thermoelectric conversion unit and adjusts the temperature of the one end of the thermoelectric conversion unit, a second heat storage body in thermal contact with the other end of the thermoelectric conversion unit, a heat dissipation section in thermal contact with the second heat storage body, a heat insulating layer that covers the first heat storage body, at least a portion of the temperature adjustment unit, the thermoelectric conversion unit, and the second heat storage body, a first temperature sensor that measures the temperature of the first heat storage body, and a second temperature sensor that measures the temperature of the second heat storage body, and the temperature adjustment unit adjusts the temperature based on the measured values received from the first and second temperature sensors.
  • the temperature adjustment unit includes a third heat storage body that is in thermal contact with the one end of the thermoelectric conversion unit and is covered with the insulating layer, a heat flow switch that is disposed between the first and third heat storage bodies and is covered with the insulating layer, and that can be changed between an ON position in which the switch is in contact with the first and third heat storage bodies to transfer heat between the first and third heat storage bodies and an OFF position in which the switch is separated from one of the first and third heat storage bodies to stop the heat transfer, a third temperature sensor that measures the temperature of the third heat storage body, and a control unit that is operatively connected to the heat flow switch and controls the heat flow switch based on the measured values received from the first and second temperature sensors and the measured values received from the third temperature sensor.
  • the heat collecting section has a heat shielding mechanism for blocking heat exchange with the heat source.
  • the heat collecting unit is in thermal contact with the first heat storage body and has a light receiving unit that receives sunlight and a light collecting unit that collects the sunlight on the light receiving unit, and more preferably, the heat collecting unit further has a light blocking mechanism for blocking the sunlight from entering the light receiving unit, or the light receiving unit and the light collecting unit.
  • the first heat storage body can be removed from the thermoelectric power generation device and reassembled into the thermoelectric power generation device, and the thermoelectric power generation device further includes an external heating device having another heat collector and for heating the removed first heat storage body.
  • a heat exchanger includes a first heat storage body, a thermoelectric conversion unit having one end and the other end, a temperature adjustment unit disposed between the first heat storage body and the one end of the thermoelectric conversion unit and adjusting the temperature of the one end of the thermoelectric conversion unit, a second heat storage body in thermal contact with the other end of the thermoelectric conversion unit, an insulating layer covering the first heat storage body, at least a portion of the temperature adjustment unit, the thermoelectric conversion unit and the second heat storage body, a first temperature sensor that measures the temperature of the first heat storage body, and a second temperature sensor that measures the temperature of the second heat storage body.
  • thermoelectric power generation device is characterized in that the temperature adjustment unit includes a device main body that adjusts the temperature based on the measured values received from the first and second temperature sensors, the first and second heat storage bodies can be removed from the device main body and reassembled into the device main body, and further includes an external heating device that is in thermal contact with the removed first heat storage body and has a heat collection part that takes in heat from a heat source and heats the first heat storage body, and an external cooling device that has a heat dissipation part that is in thermal contact with the removed second heat storage body and cools the second heat storage body.
  • heat from the heat source taken in through the heat collection section is stored in the first heat storage body, while heat is released from the second heat storage body through the heat dissipation section, so that the first heat storage body is kept at a temperature higher than the guaranteed operating temperature of the thermoelectric conversion unit, and the first heat storage body constantly stores more thermal energy than is necessary for one day's power generation.
  • the temperature of the thermoelectric conversion unit is kept below and close to the guaranteed operating temperature by controlling the temperature adjustment unit, and the second heat storage body is used as a low-temperature heat storage body, maintaining the temperature difference required for power generation between one end of the thermoelectric conversion unit on the high-temperature side that contacts the temperature adjustment unit and the other end of the thermoelectric conversion unit on the low-temperature side that contacts the second heat storage body.
  • thermoelectric conversion unit the necessary temperature difference is maintained between one end on the high temperature side and the other end on the low temperature side of the thermoelectric conversion unit, and electrical energy is extracted from the thermoelectric conversion unit.
  • thermoelectric power generation device For example, assuming that there is zero heat loss during operation of the thermoelectric power generation device, if the rated temperature of the hot side of the thermoelectric power generation unit is 200°C and power generation is performed between 180°C and 200°C, the first heat storage body is heated from 200°C to, for example, 500°C, and thermal energy is stored in the first heat storage body.
  • the temperature adjustment unit also controls the high-temperature side of the thermoelectric conversion unit to be maintained at 180°C to 200°C (when the temperature falls below 180°C, heat is supplied to the high-temperature side of the thermoelectric conversion unit, but when the temperature rises above 200°C, heat supply to the high-temperature side of the thermoelectric conversion unit is controlled to stop).
  • the product of the temperature difference between 200°C and 500°C (300°C) and the specific heat capacity of the first heat storage body is the thermal energy stored in the thermoelectric power generation device, and by heating the first heat storage body to 200°C or higher, thermal energy for the required number of days is stored and stable power generation is performed.
  • thermoelectric power generation according to the present invention can be likened to hydroelectric power generation, in which a river is blocked by a dam to form a reservoir upstream of the dam, and a fixed amount of water (e.g., several months' worth of river flow) is stored at all times while an amount of water equivalent to the average daily river flow is released from the dam, maintaining a certain degree of water level difference between the reservoir water level and the water level downstream of the dam, and generating electricity by utilizing the potential energy of the water according to this water level difference.
  • a river is blocked by a dam to form a reservoir upstream of the dam
  • a fixed amount of water e.g., several months' worth of river flow
  • the first heat storage body as a high-temperature heat storage body and the second heat storage body as a low-temperature heat storage body
  • a sufficient temperature gradient suitable for power generation can be generated between the high-temperature end and the low-temperature end of the thermoelectric conversion unit, thereby obtaining an amount of power generation sufficient to cover the electricity used in homes and offices.
  • the first heat storage body can store the amount of heat required for power generation for several days, stable power generation is always possible even if there are several consecutive days in which heat storage is insufficient.
  • thermoelectric conversion unit Even if the first heat storage body is heated to a temperature above the guaranteed operating temperature of the thermoelectric conversion unit, the presence of a temperature control unit between the first heat storage body and the thermoelectric conversion unit prevents the thermoelectric conversion unit from being heated to a temperature above its guaranteed operating temperature, thereby ensuring stable operation of the thermoelectric conversion unit.
  • thermoelectric power generation device of the present invention is installed outdoors or on the roof of a house or building as a power source for the home or office, and heat is stored in the first heat storage body mainly using solar radiation energy, it will be possible to store multiple days' worth of sunlight, which is considered to be a renewable energy source with an unstable supply and which fluctuates greatly depending on the time of day, sunshine, seasons, etc., as thermal energy and convert it into electrical energy according to daily demand for a stable supply.
  • the first heat storage body can be removed from the thermoelectric power generation device and re-installed in the thermoelectric power generation device, and an external heating device having a separate heat collection section for heating the removed first heat storage body can also be provided.
  • the heat source of this external heating device can be, for example, thermal energy produced by burning biofuels or fossil fuels.
  • thermoelectric power generation device the heat collection unit and heat dissipation unit are omitted from the above-mentioned thermoelectric power generation device to provide the device main body, and the first and second heat storage bodies can be removed from the device main body and reassembled into the device main body.
  • an external heating device is provided that has a heat collection unit that is in thermal contact with the removed first heat storage body and takes in heat from a heat source, and that heats the first heat storage body
  • an external cooling device is provided that has a heat dissipation unit that is in thermal contact with the removed second heat storage body and that cools the second heat storage body, thereby making it possible to make the power generation unit of the thermoelectric power generation device compact.
  • this device body can be mounted on a moving machine or automobile to provide electrical energy as a power source.
  • the extracted electrical energy can be temporarily stored in a battery, as in the case of solar power generation, and then provided as AC power by a power conditioning system (PCS), making it possible to supply more power than the output of the thermoelectric conversion unit for a short period of time.
  • PCS power conditioning system
  • FIG. 1 is a vertical cross-sectional view showing a schematic configuration of a thermoelectric power generation device according to an embodiment of the present invention.
  • FIG. 1 is a diagram showing a specific example of a thermal flow switch.
  • FIG. 1 is a diagram showing a specific example of a thermal flow switch.
  • FIG. 4 is a vertical cross-sectional view showing a schematic configuration of a thermoelectric power generation device according to another embodiment of the present invention.
  • 5 is a vertical cross-sectional view showing a schematic configuration of a modified example of the thermoelectric power generation device shown in FIG. 4.
  • FIG. 11 is a vertical cross-sectional view showing a schematic configuration of a thermoelectric power generation device according to still another embodiment of the present invention.
  • FIG. 1 is a vertical cross-sectional view showing a schematic configuration of a thermoelectric generating device according to an embodiment of the present invention.
  • a thermoelectric power generation device 1 of the present invention includes a heat collection section 2 that takes in heat from a heat source Q, and a first heat storage body (high-temperature heat storage body) 3 that is in thermal contact with the heat collection section 2.
  • Heat sources Q that can be used include, for example, sunlight (solar radiation energy), industrial furnaces, geothermal energy, exhaust gas from internal combustion engines, nuclear reactors, and heat storage bodies that store the thermal energy of these.
  • the heat collection section 2 preferably has a configuration that allows for more efficient intake of heat (heat absorption) from the heat source Q. Moreover, the heat collecting section 2 preferably has a heat shielding mechanism for blocking heat exchange with the heat source Q. When there is a risk that the first heat storage body 3 will be heated to a predetermined temperature or higher, or when maintenance of the thermoelectric power generating device is being performed, the heat shielding mechanism operates to prevent damage to the thermoelectric power generating device and ensure the safety of workers.
  • the first heat storage body 3 is preferably a metal block, or a rock, or a concrete block, or a container filled with latent heat storage material, or a liquid such as water (including gel-like materials), and in this embodiment is made of an aluminum block or a concrete block.
  • the thermoelectric power generation device 1 of the present invention further includes a thermoelectric conversion unit 4 having one end 4a and the other end 4b, a temperature adjustment unit 5 disposed between the first heat storage body 3 and the one end 4a of the thermoelectric conversion unit 4 to adjust the temperature of the one end 4a of the thermoelectric conversion unit 4, a second heat storage body (low-temperature heat storage body) 6 in thermal contact with the other end 4b of the thermoelectric conversion unit 4, a heat dissipation section 7 in thermal contact with the second heat storage body 6, a heat insulating layer 8 covering the first heat storage body 3, at least a part of the temperature adjustment unit 5, the thermoelectric conversion unit 4 and the second heat storage body 6, a first temperature sensor 12 for measuring the temperature of the first heat storage body 3, and a second temperature sensor 13 for measuring the temperature of the second heat storage body 6.
  • a thermoelectric conversion unit 4 having one end 4a and the other end 4b
  • a temperature adjustment unit 5 disposed between the first heat storage body 3 and the one end 4a of the thermoelectric conversion unit 4 to
  • thermoelectric conversion method used by the thermoelectric conversion unit 4 is not limited, and any method can be used, such as the Seebeck effect, the anomalous Nernst effect, thermionic conversion (TIC), the spin Seebeck effect, or binary power generation, which is not a direct power generation from heat to electricity.
  • any method can be used, such as the Seebeck effect, the anomalous Nernst effect, thermionic conversion (TIC), the spin Seebeck effect, or binary power generation, which is not a direct power generation from heat to electricity.
  • the second heat storage body 6 has a similar configuration to the first heat storage body 3.
  • the temperature adjustment unit 5 includes a third heat storage body 9 that is in thermal contact with one end 4a of the thermoelectric conversion unit 4 and is covered with a heat insulating layer 8; a heat flow switch 10 that is disposed between the first and third heat storage bodies 3, 9 and is covered with a heat insulating layer 8 and can be changed between an ON position in which the switch is in contact with the first and third heat storage bodies 3, 9 to transfer heat between the first and third heat storage bodies 3, 9 and an OFF position in which the switch is separated from one of the first and third heat storage bodies 3, 9 to stop the heat transfer; a third temperature sensor 11 that measures the temperature of the third heat storage body 9; and a control unit 14 that is operatively connected to the heat flow switch 10 and controls the heat flow switch 10 based on the measured values received from the first and second temperature sensors 12, 13 and the measured values received from the third temperature sensor 11.
  • the third heat storage body 9 also has a similar configuration to the first heat storage body 3.
  • the heat flow switch 10 is composed of a linear actuator 10a and a movable heat conductive block 10b connected to the tip of the operating rod of the linear actuator 10a, for example, as shown in Figures 2A and B.
  • the operating rod of the linear actuator 10a When the heat flow switch 10 is in the OFF state, as shown in FIG. 2A, the operating rod of the linear actuator 10a is in a retracted position and the movable heat conduction block 10b is separated from the first and third heat storage bodies 3 and 9. However, when the heat flow switch 10 is in the ON state, as shown in FIG. 2B, the operating rod of the linear actuator 10a protrudes and the movable heat conduction block 10b comes into contact with the first and third heat storage bodies 3 and 9, thereby transferring heat between the first heat storage body 3 and the third heat storage body 9 according to the temperature difference between them.
  • the heat flow switch 10 is composed of a rotary actuator 10c and a movable heat conductive block 10d that is rotationally driven by the rotary actuator 10c, as shown in Figures 3A and B.
  • the movable heat conduction block 10d When the heat flow switch 10 is in the OFF state, as shown in FIG. 3A, the movable heat conduction block 10d is separated from the first and third heat storage bodies 3, 9. However, when the heat flow switch 10 is in the ON state, as shown in FIG. 3B, the movable heat conduction block 10d is rotated by the rotary actuator 10c and comes into contact with the first and third heat storage bodies 3, 9, so that heat is transferred between the first heat storage body 3 and the third heat storage body 9 according to the temperature difference between them.
  • the heat flow switch 10 is operated using a portion of the power output by the thermoelectric power generation device 1, or by storing that power in a storage battery and then using a portion of the power output by the storage battery.
  • thermoelectric conversion unit 5 even if the first heat storage body 3 is heated to a temperature above the guaranteed operating temperature of the thermoelectric conversion unit 4, by appropriately switching the heat flow switch 10 ON/OFF, the temperature of the third heat storage body 9 (and therefore one end 4a of the thermoelectric conversion unit 4) is always maintained below the guaranteed operating temperature of the thermoelectric conversion unit 4 and higher than the second heat storage body 6 (and therefore the other end 4b of the thermoelectric conversion unit 4), and heat is transferred from the third heat storage body 9 to the thermoelectric conversion unit 4, generating electricity. In this way, the thermoelectric conversion unit 4 is prevented from being heated to a temperature exceeding its guaranteed operating temperature when heat is transferred from the first heat storage body 3 to the thermoelectric conversion unit 4, thereby ensuring stable operation of the thermoelectric conversion unit 4.
  • the heat dissipation section 7 has a configuration that can be cooled, for example, by water from a river or lake, or tap water, or by a suitable air-cooling means, or by heat of vaporization (heat of evaporation), or by radiation cooling, or an appropriate combination of these configurations, and constantly maintains the second heat storage body 6 at a lower temperature than the third heat storage body 9.
  • thermoelectric power generation device 1 of the present invention heat from the heat source Q taken in through the heat collection section 2 is stored in the first heat storage body 3, while heat is released from the second heat storage body 6 through the heat dissipation section 7, so that the first heat storage body 3 is kept at a temperature higher than the guaranteed operating temperature of the thermoelectric conversion unit 4, and the first heat storage body 3 constantly stores more thermal energy than is necessary for power generation in one day.
  • the heat flow switch 10 of the temperature adjustment unit 5 is turned ON/OFF, and the temperature of the third heat storage body 9 of the temperature adjustment unit 5 (and thus one end 4a of the thermoelectric conversion unit 4) is maintained below the guaranteed operating temperature of the thermoelectric conversion unit 4 (hereinafter referred to as the “maximum set temperature H") and above a temperature (hereinafter referred to as the “minimum set temperature L”) at which a temperature difference is generated between the second heat storage body 6 (and thus the other end 4b of the thermoelectric conversion unit 4) at which a certain thermoelectric conversion efficiency is maintained.
  • the maximum set temperature H the guaranteed operating temperature of the thermoelectric conversion unit 4
  • minimum set temperature L a temperature at which a temperature difference is generated between the second heat storage body 6 (and thus the other end 4b of the thermoelectric conversion unit 4) at which a certain thermoelectric conversion efficiency is maintained.
  • the heat flow switch 10 when the heat flow switch 10 is in the OFF state and the temperature of the third heat storage body 9 falls below the minimum set temperature L, the heat flow switch 10 switches to the ON state, the thermal energy of the first heat storage body 3 is supplied to the third heat storage body 9, and the temperature of the heat storage body 9 rises. Then, when the heat flow switch 10 is in the ON state and the temperature of the third heat storage body 9 rises above the maximum set temperature H, the heat flow switch 10 switches to the OFF state, and the temperature of the third heat storage body 9 drops. In this manner, the control of the heat flow switch 10 is repeated.
  • the temperature of the third heat storage body 9 will fluctuate between 270°C and 300°C.
  • the first heat storage body 3 is supplied with thermal energy from the heat source Q and heated to a high temperature of 300°C or higher, but if it is already at 500°C, the product of that temperature difference (200°C) and the specific heat capacity of the first heat storage body 3 becomes the thermal energy that is stored and can be supplied.
  • first heat storage body 3 rises above the maximum operating temperature (a temperature that may impede stable operation of first heat storage body 3, for example 800°C)
  • the heat shielding mechanism will limit any further temperature rise.
  • thermoelectric conversion unit that obtains thermal energy from a high-temperature heat source Q, for example, much higher than 100°C, and directly converts the thermal energy into electrical energy. Then, a day's worth of electricity is generated according to the temperature difference that is constantly generated between the high-temperature end 4a and the low-temperature end 4b of the thermoelectric conversion unit 4.
  • thermoelectric conversion unit 4 by keeping the heat flow switch 10 in an OFF state for a certain period of time, it is possible to stop the supply of thermal energy to the thermoelectric conversion unit 4 during that period and to stop the power generation operation. In this way, when the amount of generated power exceeds the amount of consumed power and the storage battery becomes full, or when necessary for maintenance or the like, the thermoelectric generating device can be stopped.
  • the output power is first stored in a storage battery according to the load or application, and then provided as AC power by a power conditioning system (PCS), just like in solar power generation.
  • PCS power conditioning system
  • thermoelectric power generation according to the present invention can be likened to hydroelectric power generation, in which a river is blocked by a dam to form a reservoir upstream of the dam, and a fixed amount of water (e.g., several months' worth of river flow) is constantly stored while an amount of water equivalent to the average daily river flow is released from the dam, maintaining a certain degree of water level difference between the reservoir water level and the water level downstream of the dam.
  • This water level difference is regarded as head, and the potential energy of water is used to generate electricity.
  • the first heat storage body 3 forms the high-temperature side heat storage body
  • the second heat storage body 6 forms the low-temperature side heat storage body, thereby creating a sufficient temperature gradient suitable for power generation between the high-temperature side end 4a and the low-temperature side end 4b of the thermoelectric conversion unit 4, and obtaining sufficient power generation to cover the electricity used in homes, offices, etc.
  • the first heat storage body 3 can store the amount of heat required for power generation for several days, stable power generation is always possible even if there are several consecutive days in which heat storage is insufficient.
  • thermoelectric conversion unit 4 Even if the first heat storage body 3 is heated to a temperature above the guaranteed operating temperature of the thermoelectric conversion unit 4, the temperature control unit 5 is interposed between the first heat storage body 3 and the thermoelectric conversion unit 4, thereby preventing the thermoelectric conversion unit 4 from being heated to a temperature that exceeds the guaranteed operating temperature, thereby ensuring stable operation of the thermoelectric conversion unit 4.
  • FIG. 4 is a vertical sectional view showing a schematic configuration of a thermoelectric generating device according to another embodiment of the present invention.
  • the embodiment of Fig. 4 is a more specific embodiment of the configuration of the heat collecting section 2 in the embodiment of Fig. 1. Therefore, in Fig. 4, the same components as those in Fig. 1 are given the same reference numerals, and detailed description thereof will be omitted below.
  • sunlight solar radiation energy
  • the heat collection section 2' is in thermal contact with the first heat storage body 3 and has a light receiving section 15 that receives sunlight and a light collecting section 16 that collects the sunlight onto the light receiving section 15.
  • the light receiving unit 15 preferably has a configuration that can efficiently absorb the received sunlight and convert it into heat. Therefore, in order to ensure that the surface area of the light receiving unit 15 is as large as possible, it is preferable that the surface of the light receiving unit 15 has irregularities or is rough, and that it has a dark color such as black. Furthermore, it is preferable that the light receiving unit 15 has a structure and shape that can block rain, snow, dust, etc., and is not destroyed by collisions with flying objects caused by strong winds.
  • the light-collecting unit 16 has a known suitable configuration that can efficiently receive solar radiation and reflect or concentrate it toward the light-receiving unit 15.
  • the heat collecting unit 2' further includes a light blocking mechanism for blocking the incidence of sunlight on the light receiving unit 15, or on the light receiving unit 15 and the light collecting unit 16.
  • thermoelectric power generation device 1' of the present invention is installed outdoors or on the roof of a house as a power source for general household use and heat is stored in the first heat storage body 3 using solar radiation energy, it will be possible to store multiple days' worth of sunlight, which is considered to be a renewable energy source with an unstable supply and which fluctuates greatly depending on the time of day, sunshine, seasons, etc., as thermal energy and convert it into electrical energy according to daily demand for a stable supply.
  • FIG. 5 is a vertical cross-sectional view showing the schematic configuration of a modified example of the thermoelectric power generation device shown in FIG. 4.
  • the same components as those shown in FIG. 1 and FIG. 4 are given the same numbers. Note that in FIG. 5, the first and second temperature sensors 12, 13, and the third temperature sensor 11 and control unit 14 of the temperature adjustment unit 5 are not shown.
  • the first heat storage body 3 of the thermoelectric power generation device 1" can be removed from the thermoelectric power generation device 1" and reassembled into the thermoelectric power generation device 1".
  • thermoelectric power generation device 1 ′′ further comprises an external heating device 17 for heating the removed first heat storage body 3 .
  • the external heating device 17 has an insulated container 18 that houses the first heat storage body 3, and another heat collection section 2 that is provided in the insulated container 18, absorbs heat from a heat source (e.g., thermal energy from the combustion of biofuel or fossil fuel) Q, and is in thermal contact with the first heat storage body 3.
  • a heat source e.g., thermal energy from the combustion of biofuel or fossil fuel
  • the first heat storage body 3 when sufficient heat storage cannot be achieved at the installation location of the thermoelectric power generation device 1" due to the season or weather, the first heat storage body 3 is removed from the thermoelectric power generation device 1" and moved to an external heating device 17, and is contained in an insulated container 18 of the heating device 17 and brought into contact with the heat collection section 2, thereby heating the first heat storage body 3. After the heat storage in the first heat storage body 3 is completed, the first heat storage body 3 is again incorporated into the thermoelectric power generation device 1 ′′ to generate power.
  • FIG. 6 is a vertical cross-sectional view showing the schematic configuration of a thermoelectric power generation device according to yet another embodiment of the present invention.
  • the same components as those shown in FIG. 1 are given the same numbers. Note that in FIG. 6, the first and second temperature sensors 12, 13, and the third temperature sensor 11 and control unit 14 of the adjustment unit 5 are not shown.
  • the thermoelectric power generation device 1''' includes a first heat storage body 3, a thermoelectric conversion unit 4 having one end 4a and the other end 4b, a temperature adjustment unit 5 disposed between the first heat storage body 3 and the one end 4a of the thermoelectric conversion unit 4 to adjust the temperature of the one end 4a of the thermoelectric conversion unit 4, a second heat storage body 6 in thermal contact with the other end 4b of the thermoelectric conversion unit 4, a heat insulating layer 8 covering the first heat storage body 3, at least a part of the temperature adjustment unit 5, the thermoelectric conversion unit 4 and the second heat storage body 6, a first temperature sensor (not shown) that measures the temperature of the first heat storage body 3, and a second temperature sensor (not shown) that measures the temperature of the second heat storage body 6, and includes a device body 19 in which the temperature adjustment unit 5 adjusts the temperature based on the measured values received from the first and second temperature sensors.
  • the temperature adjustment unit 5 has the same configuration as that of the embodiment shown in FIG.
  • thermoelectric power generation device 1''' further includes an external heating device 20 for heating the removed first heat storage body 3, and an external cooling device 22 for cooling the removed second heat storage body 6.
  • the external heating device 20 has an insulated container 21 that houses the first heat storage body 3, and a heat collection section 2 that is provided in the insulated container 21, absorbs heat from a heat source Q, and is in thermal contact with the first heat storage body 3.
  • the external cooling device 22 has a heat insulating container 23 that houses the second heat storage body 6 , and a heat dissipation part 7 that is provided in the heat insulating container 23 and in thermal contact with the second heat storage body 6 .
  • the first heat storage body 3 is removed from the device main body 19 and moved to an external heating device 20, placed in an insulated container 21 of the heating device 20, and brought into contact with the heat collection section 2, thereby heating the first heat storage body 3.
  • the second heat storage body 6 is removed from the device main body 19 and moved to an external cooling device 22, placed in an insulated container 23 of the cooling device 22, and cooled by contacting the heat dissipation section 7.
  • thermoelectric power generating device 1''' can be made compact and can be mounted on moving machinery or automobiles.
  • Thermoelectric power generation device 2 Heat collection section 3 First heat storage body (high-temperature heat storage body) 4 Thermoelectric conversion unit 4a One end 4b Other end 5 Temperature adjustment unit 6 Second heat storage body (low-temperature heat storage body) Reference Signs List 7 Heat dissipation section 8 Thermal insulation layer 9 Third heat storage body 10 Heat flow switch 10a Linear actuator 10b Movable heat-conducting block 10c Rotary actuator 10d Movable heat-conducting block 11 Third temperature sensor 12 First temperature sensor 13 Second temperature sensor 14 Control section 15 Light receiving section 16 Light collecting section 17 External heating device 18 Thermal insulation container 19 Device body 20 External cooling device 21 Thermal insulation container 22 Cooling device 23 Thermal insulation container Q Heat source

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention comprend : une partie de collecte de chaleur 2 qui prend de la chaleur à partir d'une source de chaleur Q ; un premier corps de stockage de chaleur 3 en contact thermique avec la partie de collecte de chaleur ; une unité de conversion thermoélectrique 4 ; une unité de réglage de température 5 qui est disposée entre le premier corps de stockage de chaleur et une extrémité 4a de l'unité de conversion thermoélectrique et qui règle la température de la première extrémité de l'unité de conversion thermoélectrique ; un second corps de stockage de chaleur 6 en contact thermique avec l'autre extrémité 4b de l'unité de conversion thermoélectrique ; une partie de dissipation de chaleur 7 en contact thermique avec le second corps de stockage de chaleur ; une couche d'isolation thermique 8 qui recouvre le premier corps de stockage de chaleur, au moins une partie de l'unité de réglage de température, de l'unité de conversion thermoélectrique et du second corps de stockage de chaleur ; un premier capteur de température 12 qui mesure la température du premier corps de stockage de chaleur ; et un second capteur de température 13 qui mesure la température du second corps de stockage de chaleur.
PCT/JP2023/030151 2022-11-14 2023-08-22 Dispositif de production d'énergie thermoélectrique WO2024105954A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09213984A (ja) * 1996-02-07 1997-08-15 Canon Inc 太陽光エネルギー変換装置、建築物、及び光電変換素子の温度制御方法
WO2013099943A1 (fr) * 2011-12-26 2013-07-04 Nakanuma Tadashi Dispositif de génération thermoélectrique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09213984A (ja) * 1996-02-07 1997-08-15 Canon Inc 太陽光エネルギー変換装置、建築物、及び光電変換素子の温度制御方法
WO2013099943A1 (fr) * 2011-12-26 2013-07-04 Nakanuma Tadashi Dispositif de génération thermoélectrique

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