WO2023195158A1 - 熱変換システム及び熱変換方法 - Google Patents

熱変換システム及び熱変換方法 Download PDF

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Publication number
WO2023195158A1
WO2023195158A1 PCT/JP2022/017363 JP2022017363W WO2023195158A1 WO 2023195158 A1 WO2023195158 A1 WO 2023195158A1 JP 2022017363 W JP2022017363 W JP 2022017363W WO 2023195158 A1 WO2023195158 A1 WO 2023195158A1
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WO
WIPO (PCT)
Prior art keywords
heat conversion
conversion system
water
temperature
float
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/017363
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English (en)
French (fr)
Japanese (ja)
Inventor
栄伸 廣田
一貴 納戸
卓威 植松
和典 片山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to PCT/JP2022/017363 priority Critical patent/WO2023195158A1/ja
Priority to JP2024513667A priority patent/JPWO2023195158A1/ja
Priority to US18/847,890 priority patent/US20250198708A1/en
Publication of WO2023195158A1 publication Critical patent/WO2023195158A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/4433—Floating structures carrying electric power plants
    • B63B2035/4453—Floating structures carrying electric power plants for converting solar energy into electric energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/04—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using pressure differences or thermal differences occurring in nature
    • F03G7/05—Ocean thermal energy conversion, i.e. OTEC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for

Definitions

  • the present disclosure relates to systems and methods for reducing temperatures near the surface of water.
  • Solar power generation is a system that directly converts sunlight into electricity. Since power generation itself does not require fuel, it does not emit greenhouse gases. For this reason, solar panels were installed across Japan as a national strategy. The number of installations has increased particularly since 2012. However, there are no reports that the Earth's atmospheric temperature is decreasing, but rather increasing.
  • IPCC is an abbreviation for the United Nations Intergovernmental Panel on climate Change, which is a scientific, technological, socio-economic, and This organization was established for the purpose of conducting comprehensive evaluations from various perspectives.
  • Figure 1 shows water depth and water temperature in the ocean. Although the name of the surface mixed layer changes, the water temperature decreases as the water gets deeper, and when the water depth exceeds 4000 m, the water temperature drops below 5 degrees Celsius. This means that the seawater itself is cold. Seawater is in contact with the atmosphere, and if the temperature near the sea surface can be lowered, this will lead to lower atmospheric temperatures in contact with the seawater.
  • the present disclosure aims to reduce the temperature near the water surface.
  • the inventors investigated a method of cooling the atmosphere using this cold energy in seawater. For example, if you want to extract energy by stirring seawater, you will need energy to stir it. In this case, producing that energy would mean emitting additional greenhouse gases, which would be putting the cart before the horse. Therefore, the inventors devised a system that lowers the temperature near the sea surface without using wasteful energy such as stirring.
  • the heat conversion system of the present disclosure includes: A float that floats on water, a heat conversion unit connected to the float and connecting the vicinity of the water surface and a predetermined water depth with a thermally conductive medium; Equipped with
  • a thermally conductive heat conversion section cools the water surface area by transmitting heat near the water surface to a predetermined water depth.
  • the heat conversion section includes: A metal plate placed near the water surface, a metal wire extending from the metal plate in the water depth direction; may be provided.
  • the metal wire may have a polygonal cross-sectional shape.
  • the heat conversion system of the present disclosure includes: An optical fiber that senses the temperature in the water, a temperature measuring device that measures the temperature sensed by the optical fiber; may be provided.
  • the heat conversion system of the present disclosure includes a position measuring device that measures the geographical position of the float, and moves the float to a predetermined geographical position based on the geographical position measured by the position measuring device.
  • a propulsion section may be provided.
  • the heat conversion system of the present disclosure includes a solar panel that converts solar energy into electric power, and a battery that supplies the electric power generated by the solar panel to the position measuring device and the propulsion section. You can leave it there.
  • the temperature near the water surface can be lowered. Therefore, by applying the present disclosure to any water surface on earth, such as the ocean, it is possible to reduce the atmospheric temperature in contact with the water surface.
  • This is an example of the structure of a heat conversion system.
  • This is an example of a cross-sectional structure of a metal wire.
  • This is an example of installing a heat conversion system underwater and transferring energy.
  • This is an example of atmospheric temperature changes associated with seawater cooling.
  • This is an example of the structure of a heat conversion system equipped with a seawater temperature observation function.
  • 1 is an example of a structure of a thermal conversion system with power supply and position correction functions. This is an example of how a heat conversion system is connected.
  • FIG. 1 An example of the system structure is shown in Figure 2.
  • the present disclosure includes three structures. First is the heat conversion section 10, which is composed of a metal plate 11 and a metal wire 12, and this part has a heat conversion function. The second is the float 20, which is a necessary function to float this system on the sea.
  • the shape of the float 20 is arbitrary, it is, for example, a flat plate.
  • the material of the float 20 can be any material that floats on water, for example polyurethane.
  • the metal plate 11 and the metal wire 12 are any medium having thermal conductivity, and for example, a metal material can be used.
  • the metal plate 11 and the metal wire 12 are preferably made of a material with high thermal conductivity; for example, they may be made of copper, which is a metal material that is stable in price and easily available.
  • FIG. 3 shows an example of the cross-sectional shape of the metal wire 12.
  • the cross-sectional shape of the metal wire 12 is generally circular. This is the easiest to make and therefore the most available. However, by making the cross-sectional shape of the metal wire 12 polygonal, such as square or star-shaped, the heat conversion efficiency can be increased.
  • the third part is a connecting part 21 for connecting the heat converting part 10 and the float 20.
  • the structure of the connecting portion 21 can be, for example, a hook shape that is difficult to disconnect, such as is used when connecting trains.
  • FIG. 2 shows an example in which four metal wires 12 are connected to one metal plate 11, the present disclosure is not limited to this.
  • the number of metal wires 12 connected to the metal plate 11 may be three or less, or may be five or more.
  • each metal wire 12 is not limited to one wire, but may be a wire rope in which a plurality of wires are tied together. This allows it to bend flexibly to match the ocean currents, thereby reducing its impact on ocean currents.
  • FIG. 4 shows an example of installing the proposed heat conversion system underwater. Since the float 20 is provided, that part is installed above the sea surface. Since the float 20 and the heat conversion section 10 are connected, the metal plate 11 and the metal wire 12 are installed in the sea. In this system, a metal plate 11 is installed in the depth direction of the sea.
  • the metal wire 12 extending from the metal plate 11 extends in the depth direction of the sea.
  • Figure 1 shows that the deeper the seawater, the lower its temperature, or the colder it becomes. That is, energy moves through the metal plate 11 and the metal wire 12. Warm energy near the sea surface propagates through the metal wire 12 to a cold energy region deep under the sea. In other words, the temperature of the sea water near the surface of the ocean decreases, leading to it becoming colder.
  • Figure 5 shows atmospheric cooling. Using the heat conversion system devised, if the temperature of the seawater surface is lowered, the surrounding atmosphere will also be cooled. By using the cold energy deep in the ocean to lower the surface temperature of the ocean, the atmosphere can be cooled.
  • the metal plate 11 only needs to be placed near the sea surface.
  • the area near the sea surface may be underwater or above water.
  • the temperature is preferably close to atmospheric temperature, and for example, the metal plate 11 is placed at a depth of 0 m or more and 30 m or less.
  • the tip of the metal wire 12 may be placed at any water depth that can lower the temperature of the metal plate 11, for example, it may be placed at a water depth of 50 m or more.
  • Embodiment example 3 In Embodiment 3, an example in which a function for observing changes in seawater temperature is installed in the heat conversion system of this embodiment will be described. In this system, seawater temperature changes occur in order to cool the atmosphere. Therefore, the system of this embodiment has a function of observing changes in seawater temperature.
  • FIG. 6 shows the observation method.
  • An optical fiber thermometer will be used for observation.
  • the optical fiber 30 is installed in the depth direction, and a temperature measuring device 31 is placed on one side of the optical fiber 30.
  • One of the characteristics of the optical fiber 30 is that when the temperature of the optical fiber changes due to a change in ambient temperature, the optical fiber 30 itself contracts in the longitudinal direction.
  • the change in the optical fiber 30 is called strain.
  • This strain can be evaluated with a temperature measuring device 31 installed on one side of the optical fiber 30, and the amount of change in seawater temperature can be estimated for each depth using the distribution of the amount of strain in the length direction of the optical fiber 30. Therefore, the heat conversion system of this embodiment can grasp the amount of change in seawater temperature caused by installing the heat conversion system.
  • the temperature measuring device 31 is equipped with a wireless device 32 and can send measurement data to the user wirelessly.
  • Embodiment example 4 In Embodiment 4, an example in which a position correction function is installed in the heat conversion system of this embodiment will be described.
  • the heat exchange system is equipped with floats 20 and is installed on the sea. There are ocean currents in the ocean, and objects floating on the ocean move due to the currents. Even if there is an area where you want to cool the atmosphere, there is a possibility that this system will flow to other areas. Therefore, the heat conversion system of this embodiment has a configuration that prevents the atmosphere from flowing away from the area where it is desired to be cooled.
  • FIG. 7 shows an example of the system configuration of this embodiment.
  • the heat conversion system of this embodiment includes a GPS (Global Positioning System) 35 that functions as a position measuring device, a screw 36 that functions as a propulsion section, a solar panel 33, and a battery. 34.
  • GPS Global Positioning System
  • a solar panel 33 that converts sunlight energy into electricity is installed on the surface of the float 20, and the solar panel 33 generates electricity.
  • a battery 34 is arranged to store the electric power. Power is distributed from the battery 34 to the temperature measuring device 31, the wireless device 32, the GPS 35, and the screw 36.
  • the GPS 35 measures the geographical position of the float 20. Since the heat conversion system of this embodiment is equipped with GPS 35, it is possible to accurately grasp the geographical position. Therefore, for example, if the heat conversion system moves due to the influence of ocean currents and deviates from a predetermined geographical position, the heat conversion system of this embodiment moves the screw 36 to move the float 20 to a predetermined geographical position. can be moved to position. Furthermore, power is required for the temperature measurement device 31 to measure the strain on the optical fiber 30 and for the wireless device 32 to wirelessly transmit the data to land, but it is possible to do this using the power of the battery 34. can.
  • FIG. 8 shows an example of connecting a plurality of heat conversion systems.
  • a heat conversion system is constructed in seawater using a float 20 or the like.
  • the structure of the connecting part 37 can be, for example, a hook shape that is difficult to be disconnected, such as is used when connecting trains.
  • the various devices mounted on the float 20 can also be changed as necessary.
  • Atmospheric temperature can be lowered by placing the heat conversion system of the present disclosure near any water surface on earth, such as a lake, as long as the temperature decreases depending on the water depth as shown in Figure 1. .
  • Metal plate 12 Metal wire 20: Float 21, 37: Connecting portion 30: Optical fiber 31: Temperature measuring device 32: Wireless device 33: Solar panel 34: Battery 35: GPS 36: Screw

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Photovoltaic Devices (AREA)
PCT/JP2022/017363 2022-04-08 2022-04-08 熱変換システム及び熱変換方法 Ceased WO2023195158A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2022/017363 WO2023195158A1 (ja) 2022-04-08 2022-04-08 熱変換システム及び熱変換方法
JP2024513667A JPWO2023195158A1 (https=) 2022-04-08 2022-04-08
US18/847,890 US20250198708A1 (en) 2022-04-08 2022-04-08 Heat conversion system and heat conversion method

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PCT/JP2022/017363 WO2023195158A1 (ja) 2022-04-08 2022-04-08 熱変換システム及び熱変換方法

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6321366A (ja) * 1986-07-16 1988-01-28 Kajima Corp 蓄熱式海洋温度差発電装置
JPH02240533A (ja) * 1989-03-14 1990-09-25 Furuno Electric Co Ltd 水中温度測定方法
JPH10205891A (ja) * 1997-01-06 1998-08-04 Seiichi Terui 太陽・波力エネルギーの捕促装置と発電方法
JPH1118615A (ja) * 1997-07-07 1999-01-26 Jatco Corp 海洋移動体および海洋移動体管理システム
JP2002136160A (ja) * 2000-10-27 2002-05-10 Seiko Epson Corp 熱電発電器
JP2003517570A (ja) * 1998-06-18 2003-05-27 キネテイツク・リミテツド 温度感知装置
JP2005327795A (ja) * 2004-05-12 2005-11-24 Sumitomo Electric Ind Ltd 放熱器
JP2013545956A (ja) * 2010-02-13 2013-12-26 マクアリスター テクノロジーズ エルエルシー 熱伝達装置、ならびに関連したシステムおよび方法
JP2015028339A (ja) * 2009-08-27 2015-02-12 マクアリスター テクノロジーズ エルエルシー 補足される海洋熱エネルギー変換（ｓｏｔｅｃ）システムの効率の増加
JP2020150139A (ja) * 2019-03-13 2020-09-17 株式会社テックスイージー 熱電変換モジュール
JP2021143669A (ja) * 2020-03-12 2021-09-24 陽 凍田 台風等の熱帯低気圧制御を目的とする揚水式水圧発電構造体と統合運用方法
JP2022026899A (ja) * 2020-07-31 2022-02-10 三菱ケミカル株式会社 海洋浮体型構造物及び海洋浮体型構造物を用いて海水を冷却するとともにプラスチックを回収する方法。

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007055029A1 (ja) * 2005-11-14 2007-05-18 Ko Tsuneda 深海水散布システム
US20110123314A1 (en) * 2009-11-21 2011-05-26 Tyson York Winarski Apparatus and method for forced convection of seawater
US20190234656A1 (en) * 2018-01-29 2019-08-01 Mohammad R. Ehsani Cooling coastal waters
US20200037516A1 (en) * 2018-08-06 2020-02-06 David Rubin Meteorological modification method and apparatus
JP2022103850A (ja) * 2020-12-28 2022-07-08 リンテック株式会社 海水温制御装置

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6321366A (ja) * 1986-07-16 1988-01-28 Kajima Corp 蓄熱式海洋温度差発電装置
JPH02240533A (ja) * 1989-03-14 1990-09-25 Furuno Electric Co Ltd 水中温度測定方法
JPH10205891A (ja) * 1997-01-06 1998-08-04 Seiichi Terui 太陽・波力エネルギーの捕促装置と発電方法
JPH1118615A (ja) * 1997-07-07 1999-01-26 Jatco Corp 海洋移動体および海洋移動体管理システム
JP2003517570A (ja) * 1998-06-18 2003-05-27 キネテイツク・リミテツド 温度感知装置
JP2002136160A (ja) * 2000-10-27 2002-05-10 Seiko Epson Corp 熱電発電器
JP2005327795A (ja) * 2004-05-12 2005-11-24 Sumitomo Electric Ind Ltd 放熱器
JP2015028339A (ja) * 2009-08-27 2015-02-12 マクアリスター テクノロジーズ エルエルシー 補足される海洋熱エネルギー変換（ｓｏｔｅｃ）システムの効率の増加
JP2013545956A (ja) * 2010-02-13 2013-12-26 マクアリスター テクノロジーズ エルエルシー 熱伝達装置、ならびに関連したシステムおよび方法
JP2020150139A (ja) * 2019-03-13 2020-09-17 株式会社テックスイージー 熱電変換モジュール
JP2021143669A (ja) * 2020-03-12 2021-09-24 陽 凍田 台風等の熱帯低気圧制御を目的とする揚水式水圧発電構造体と統合運用方法
JP2022026899A (ja) * 2020-07-31 2022-02-10 三菱ケミカル株式会社 海洋浮体型構造物及び海洋浮体型構造物を用いて海水を冷却するとともにプラスチックを回収する方法。

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US20250198708A1 (en) 2025-06-19

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