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WO2020138288A1 - Dispositif de refroidissement et de production d'énergie, et système de refroidissement et de production d'énergie utilisant ledit dispositif de refroidissement et de production d'énergie - Google Patents

Dispositif de refroidissement et de production d'énergie, et système de refroidissement et de production d'énergie utilisant ledit dispositif de refroidissement et de production d'énergie Download PDF

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Publication number
WO2020138288A1
WO2020138288A1 PCT/JP2019/051116 JP2019051116W WO2020138288A1 WO 2020138288 A1 WO2020138288 A1 WO 2020138288A1 JP 2019051116 W JP2019051116 W JP 2019051116W WO 2020138288 A1 WO2020138288 A1 WO 2020138288A1
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WO
WIPO (PCT)
Prior art keywords
cooling
power generation
thermoelectric conversion
fluid
generation device
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/JP2019/051116
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English (en)
Japanese (ja)
Inventor
拓哉 井手
中嶋　英雄
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.)
Institute For Lotus Materials Research Co Ltd
Original Assignee
Institute For Lotus Materials Research Co Ltd
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Priority to JP2020562410A priority Critical patent/JPWO2020138288A1/ja
Publication of WO2020138288A1 publication Critical patent/WO2020138288A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
    • H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
    • H10N10/13—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the heat-exchanging means at the junction
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
    • H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
    • H10N10/17—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the structure or configuration of the cell or thermocouple forming the device

Definitions

  • the present invention relates to a power generator that also functions as a cooling device and a system that uses the power generator.
  • thermoelectric conversion module As a power generator using thermoelectric conversion, a structure in which a p-type thermoelectric conversion element and an n-type thermoelectric conversion element are sandwiched between a low temperature side electrode and a high temperature side electrode is widely known (for example, patents Reference 1.).
  • thermoelectric conversion module is known as a power generation device utilizing the Seebeck effect in which a difference in temperature is applied to different parts to generate a potential difference between a high temperature part and a low temperature part.
  • thermoelectric conversion efficiency in order to increase the thermoelectric conversion efficiency by giving a large temperature difference to both ends of the thermoelectric conversion element, the thermal conductivity of the material is lowered, and only a large temperature difference is given to both ends. It was getting attention. Further, in the field of conventional cooling devices such as heat sinks, attention is paid only to heat dissipation, and waste heat is not effectively used.
  • the present invention is to solve the problems by increasing the thermoelectric conversion efficiency, improving the power generation capacity, and also the cooling and power generating device that can be used as a cooling device, and the cooling and power generating device.
  • the point is to provide a cooling and power generation system.
  • the present invention includes the following inventions.
  • a metal heat absorber having a contact surface for contacting an object to be cooled, through which heat of the object to be cooled is transferred, and p-type and n-type on the outer surface of the heat absorber.
  • the mold and the plurality of thermoelectric conversion elements having a plurality of through-holes, which are provided alternately in a row with a space therebetween and each have a plurality of through-holes opening on the opposite surface, and an electrode material for electrically connecting the adjacent thermoelectric conversion elements to each other, respectively.
  • a flow path for circulating a cooling fluid in the through-hole of the thermoelectric conversion element is provided, and a temperature gradient is imparted by cooling the thermoelectric conversion element to which heat is transferred from the heat absorber by the cooling fluid, and at the same time as power generation.
  • a cooling and power generator that functions as a cooler.
  • the electrode material projects from the first electrode material, which is provided inside or in the vicinity of the through-hole opening area facing each adjacent thermoelectric conversion element, and the heat absorber of each adjacent thermoelectric conversion element.
  • the cooling and power generation device according to (1) which comprises a second electrode material provided across the base end portion or in the vicinity thereof.
  • thermoelectric generators having the cooling and power generating device according to (1) or (2), a p-type and an n-type alternately arranged in parallel with each other, and having a plurality of through-holes each opening on a facing surface.
  • a second region is set, the facing first regions of adjacent thermoelectric conversion elements are connected to each other, and a first fluid is sequentially supplied to the first regions of the thermoelectric conversion elements.
  • a first fluid is sequentially supplied to the first regions of the thermoelectric conversion elements.
  • a heat dissipation and power generation device which is provided with a temperature gradient by discharging heat of the first fluid to the second fluid through the thermoelectric conversion element, and functions as a radiator of the first fluid at the same time as power generation.
  • a cooling and power generation system comprising: a cooling fluid that has flowed out of the flow channel of the cooling and power generation device and that is guided to the first flow channel as the first fluid of the heat radiation and power generation device.
  • a return channel for returning the fluid discharged from the first channel of the heat dissipation and power generation device to the channel as a cooling fluid of the cooling and power generation device, the exhaust heat flow channel and the return channel.
  • thermoelectric conversion element heat exchange between the thermoelectric conversion element and the cooling fluid is performed in a large heat transfer area having a through hole, as compared with a conventional power generating device.
  • a highly efficient cooling and power generation device that not only improves the thermoelectric conversion efficiency but also efficiently removes heat from the cooling target and transfers it to the cooling fluid, and functions as a heat sink that efficiently cools the cooling target. can do.
  • the heat of the cooling object is efficiently discharged to the cooling fluid by the cooling and power generation device as described above, and the power is generated.
  • the heat dissipation and power generation device through which the fluid passes dissipates the heat of the cooling fluid and generates power, and the thermoelectric conversion is performed twice for the cooling and power generation device and the heat dissipation and power generation device. , More electric energy can be recovered. Further, since the heat of the cooling fluid is radiated by the heat radiation and power generation device, it is possible to return the cooling fluid to the cooling and power generation device again and efficiently circulate it.
  • FIG. 3 is a perspective view showing a heat radiation and power generation device similarly used for the cooling and power generation system.
  • the cooling and power generation device 1 of the present invention has a contact surface 20 that contacts the object 9 to be cooled, through which the heat of the object 9 to be cooled is transferred. And a plurality of through-holes 30 formed on the outer surface 21 of the heat-absorbing body 2, the p-type and the n-type being alternately projecting side by side at intervals.
  • the electrode material 4 for electrically connecting the adjacent thermoelectric conversion elements 3A, 3B, and the flow path 5 for circulating the cooling fluid through the through holes 30 of the thermoelectric conversion elements 3A, 3B. I have it.
  • Such a cooling and power generation device 1 cools the thermoelectric conversion elements 3A and 3B to which heat is transferred from the heat absorber 2 by a cooling fluid passing through the flow path 5 to generate a temperature gradient, and at the same time as power generation. It functions as a cooler.
  • thermoelectric conversion elements 3A and 3B a p-type thermoelectric conversion element (3A) and an n-type thermoelectric conversion element (3B) are alternately arranged in parallel.
  • material of the thermoelectric conversion elements 3A/3B well-known materials that can be used as the p-type thermoelectric conversion element or the n-type thermoelectric conversion element can be widely applied.
  • the through holes 30 of each thermoelectric conversion element 3A, 3B can be formed by a known method such as drilling or laser processing on a solid material of the thermoelectric conversion element, but the processing cost is high, It is not suitable for mass production because it requires a long processing time.
  • the thermoelectric conversion elements 3A and 3B of this example are formed by cutting a lotus-type porous thermoelectric material molded body having a plurality of pores extending in one direction, which is molded by a solidification method, in a direction intersecting the direction in which the pores extend. It is made of a porous material having through holes, and the through holes 30 are the pores divided by the cutting. By using the porous material cut out from the lotus-type porous thermoelectric material molded body as described above, the thermoelectric conversion elements 3A/3B having a large number of through holes 30 extending in one direction can be easily obtained at low cost.
  • thermoelectric conversion element 3A/3B made of a porous material cut out from a lotus-type porous thermoelectric material molded body also has a bottomed hole that does not penetrate other than the through hole 30, but such a bottomed hole is also opened. It has the effect of increasing the surface area of the surface, and has the effect of promoting heat transfer with the fluid.
  • thermoelectric conversion elements 3A/3B is a flat plate shape in which the size of the length in the thickness direction in which the through hole 30 extends is relatively small in this example, but it may be configured in various other shapes. Of course it is good. For example, it is also a preferable example to make a three-dimensional shape in which the dimension of the through-hole extending in the thickness direction is relatively long.
  • the flow path 5 is composed of a plurality of tubes 50 (tubular bodies) made of a heat insulating material provided between the facing regions R.
  • Each tube 50 is provided with its end face joined to the opening face where the through hole 30 of the thermoelectric conversion element 3A, 3B is opened.
  • the tube 50 is a tube that allows a cooling fluid to flow inside.
  • the tube 50 is joined to the opening surface of each thermoelectric conversion element 3A, 3B in a sealed state so that fluid does not leak inside or outside the tube.
  • Reference numeral 51 is a seal portion of the joint portion.
  • the seal portion may be brazed, or a known publicly known sealant suitable for the fluid can be used.
  • fluororubber, silicone rubber, nitrile rubber or the like can be used.
  • These sealing agents can be applied to the end of the tube 50 and joined to the opening surface, or a sheet-shaped sealing material formed in advance in an annular shape can be provided so as to be sandwiched between the tube end and the opening surface. Good.
  • the first electrode material 41 provided between the insides of the through hole opening regions R facing each other of the adjacent thermoelectric conversion elements 3A and 3B, and the adjacent thermoelectric conversion elements 3A.
  • the second electrode material 42 provided between the base end portions 31, which are the root portions protruding from the heat absorber 2 of 3B, are alternately provided between the thermoelectric conversion elements 3A and 3B.
  • the electrode materials 41 and 42 are configured to electrically connect the n-type and p-type thermoelectric conversion elements in series, and to extract a large voltage.
  • the base end portion 31 of each of the thermoelectric conversion elements 3A and 3B receives the heat of the cooling target 9 through the heat absorber 2, and the cooling fluid having a temperature lower than the temperature of the heat is supplied to the flow path 5.
  • the cooling fluid having a temperature lower than the temperature of the heat is supplied to the flow path 5.
  • a temperature difference occurs in the direction from the base end 31 to the region R in each thermoelectric conversion element 103A, 103B, and the voltage generated in each element by the Seebeck effect can be collectively taken out through the electrode materials 41, 42. it can.
  • the electrode material 41 connects between the insides of the region R, but may connect near the region R.
  • the electrode material 42 may be connected in the vicinity of the base end portion 31.
  • the thermoelectric conversion elements 3A and 3B are provided on the base end face of the base end portion 31 and are erected on the heat absorber 2 via the electrode material 42, but the base end face is directly attached to the heat absorber 2.
  • the electrode material 42 may be connected to the opening surface or the side end surface near the base end portion 31 of each thermoelectric conversion element 3A, 3B.
  • thermoelectric conversion elements 3A and 3B may be provided with a plurality of the above regions, and a cooling fluid flow path (and an electrode material) may be provided between the regions.
  • the flow path 5 may be formed of a plate-shaped partition wall or the like instead of the tube 50.
  • the through hole 30 may be provided only in the region R through which the flow path 5 passes or in the periphery thereof.
  • FIGS. 2 and 3 a typical embodiment of the cooling and power generation system according to the present invention, which is a combination of the heat radiation and power generation device with the cooling and power generation device according to the present invention, will be described based on FIGS. 2 and 3.
  • the cooling and power generation system S of the present embodiment is further discharged from the flow channel 5 of the cooling and power generation device 1 with respect to the cooling and power generation device 1 according to the first embodiment described above.
  • the system is a combination of a heat radiation and power generation device 101 that takes in a cooling fluid that has absorbed the heat of the cooling target 9 and further radiates the heat in the process of radiating the heat.
  • the heat radiation and power generation device 101 includes a plurality of thermoelectric conversion elements in which p-type and n-type are alternately arranged side by side with a plurality of holes and a plurality of through-holes 130 opening to the opposite surfaces.
  • a first region R1 in which 130 is opened and a second region R2 in which a through hole 130 that allows passage of a second fluid having a temperature lower than that of the first fluid are opened are set, and adjacent thermoelectric elements are provided.
  • the first flow paths 151 which connect the first regions R1 facing each other of the conversion elements 103A and 103B and which sequentially supply the first fluid to the first regions R1 of the respective thermoelectric conversion elements, are adjacent to each other.
  • the second flow path 152 is provided which connects the facing second regions R2 of the thermoelectric conversion element and sequentially supplies the second fluid to the second region R2 of each thermoelectric conversion element.
  • the heat dissipation and power generation device 101 gives a temperature gradient by discharging the heat of the first fluid to the second fluid through the thermoelectric conversion elements 103A and 103B, and functions as a radiator of the first fluid at the same time as power generation.
  • the second region may be a region where the through hole is not opened and the second fluid flows along the surface thereof.
  • thermoelectric conversion elements 103A and 103B have the p-type thermoelectric conversion elements (103A) and the n-type thermoelectric conversion elements (103B) alternately arranged in parallel, as the thermoelectric conversion elements 3A and 3B of the cooling and power generation device 1, and are made of materials.
  • the well-known material which can be used as a p-type thermoelectric conversion element or an n-type thermoelectric conversion element can be widely applied.
  • the through-holes 130 can be formed in a solid material of the thermoelectric conversion element by a known method such as drilling or laser processing. However, like the thermoelectric conversion elements 3A and 3B, the through-holes 130 are formed in one direction by the solidification method.
  • the lotus-shaped porous thermoelectric material molded body having a plurality of elongated pores is made of a porous material obtained by cutting in a direction intersecting the direction in which the pores extend, and the through holes 130 are the pores divided by the cutting. is there.
  • thermoelectric conversion elements 3A/3B in this example, a flat plate shape in which the dimension of the length in the thickness direction in which the through hole 130 extends is relatively small is used, but various other shapes are also possible. Of course, it may be configured. For example, it is also a preferable example to make a three-dimensional shape in which the dimension of the through-hole extending in the thickness direction is relatively long.
  • the first flow path 151 is composed of a tube 50 (tubular body) made of a plurality of heat insulating materials provided between the facing first regions R1.
  • Each tube 50 is provided with its end surface joined to the opening surface where the through hole 130 of each of the thermoelectric conversion elements 103A and 103B is opened.
  • the tube 50 is a tube that allows the first fluid to flow inside, but functions as a partition wall between the fluids that allow the second fluid to flow outside.
  • the second flow path 152 is a low temperature heat bath surrounded by a wall surface of a container (not shown). It may be open to the atmosphere without the wall surface of the container. As described above, in this example, since the second flow path 152 serves as a heat bath, the second region R2 may not have the fluid passage hole. That is, the second region R2 may be a region in which the fluid passage hole is not opened and the second fluid flows along the surface thereof.
  • the electrode material 104 includes a first electrode material 143 provided between the insides of the facing first regions R1 of adjacent thermoelectric conversion elements and a second region R2 of the adjacent thermoelectric conversion elements facing each other.
  • the second electrode material 144 is provided inside or in the vicinity thereof, and the electrode materials 143 and 144 are alternately provided. These electrode materials 143 and 144 are configured so that n-type and p-type thermoelectric conversion elements are electrically connected in series and a large voltage can be taken out.
  • the comparatively high temperature cooling fluid discharged from the cooling and power generation device 1 is caused to flow through the first flow path 151 as the first fluid, and each tube 50 forming the first flow path 151.
  • the thermoelectric conversion elements 103A and 103B face outward from the center (region R1) of the flow of the thermofluid. ), a temperature difference is generated in the direction perpendicular to the flow of the thermal fluid, and the voltage generated in each element by the Seebeck effect can be collectively extracted.
  • each thermoelectric conversion element 103A/103B is provided with one central region R1 and one peripheral second region R2, but there is no limitation to such an arrangement. Also, a plurality of both may be set. For example, it is possible to provide a plurality of first regions R1 to which the tubes are connected, and, for example, two or more second regions are set by dividing the second region into left and right in the first region R1. You can also do it.
  • both flow paths 151 and 152 may be configured with tubes in this way, it is easy to form the flow paths, and the performance as designed can be stably obtained. Furthermore, both flow paths 151 and 152 can be obtained. A large gap is maintained between the tubes, that is, between the tubes, the heat insulation between the two is improved, and the thermoelectric conversion efficiency can be further improved.
  • a plate-shaped partition wall that divides the first region R1 and the second region R2 into left and right is provided between the thermoelectric conversion elements 103A/103B, and the flow that allows the first fluid to flow through these partition walls is a boundary.
  • the channel 151 and the channel 152 for circulating the second fluid may be provided on the left and right.
  • the cooling and power generation system S of the present embodiment returns the cooling fluid radiated by the heat radiation and power generation device 101 to the cooling and power generation device 1 again.
  • an exhaust heat flow passage 60 that guides the cooling fluid that has flowed out of the flow passage 5 of the cooling and power generation device 1 to the first flow passage 151 as the first fluid of the heat radiation and power generation device 101, and the heat radiation and power generation.
  • a pump 62 that circulates a cooling fluid between the combined power generation device 1 and the heat dissipation combined power generation device 101.
  • the return passage 61 and the pump 62 may be omitted and the cooling fluid may not be circulated.
  • thermoelectric conversion elements 3A and 3B are provided on the outer surface of the heat absorber 2.
  • a separate heat sink fin for heat dissipation assistance other than the thermoelectric conversion elements 3A and 3B is provided on the outer surface of the heat absorber 2.
  • a cooler such as, for example, thermoelectric conversion elements 3A, 3B followed by conventional heat sink fins further arranged in parallel to penetrate the flow path 5, and the like without departing from the scope of the present invention. It goes without saying that various forms can be implemented in.
  • Cooling/Power Generation System 1 Cooling/Power Generation Device 2 Heat Absorber 3A, 3B Thermoelectric Conversion Element 4 Electrode Material 5 Flow Path 9 Cooling Target 20 Contact Surface 21 Outer Surface 30 Through Hole 31 Base End 41, 42 Electrode Material 50, 52 , 53 tube 51 seal part 60 exhaust heat flow path 61 flow path 62 pump 101 heat dissipation and power generation device 103A, 103B thermoelectric conversion element 104 electrode material 130 through hole 143 electrode material 144 electrode material 151 first flow path 152 second flow path R, R1, R2 area

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Abstract

Le problème décrit par la présente invention est de fournir un dispositif de refroidissement et de production d'énergie dont l'efficacité de conversion thermoélectrique est améliorée, dont la capacité de production d'énergie est améliorée, et qui peut être utilisé comme dispositif de refroidissement et fournir également un système de refroidissement et de production d'énergie utilisant le dispositif de refroidissement et de production d'énergie. La solution selon l'invention porte sur un dispositif de refroidissement et de production d'énergie qui est pourvu : d'un corps d'absorption de chaleur métallique 2 qui a une surface tactile touchant un objet 9 à refroidir et auquel la chaleur de l'objet à refroidir est transmise par l'intermédiaire de la surface tactile ; d'éléments de conversion thermoélectrique 3A, 3B, le type p et le type n sont alternativement projetés côte à côte à des intervalles dans un nombre pluriel sur la surface extérieure du corps d'absorption de chaleur 2 et qui ont une pluralité de trous traversants 30 s'ouvrant sur les surfaces opposées respectives ; de matériaux d'électrode 41, 42 pour connecter électriquement les éléments de conversion thermoélectrique adjacents les uns aux autres ; et d'un trajet d'écoulement 5 pour faire circuler un fluide de refroidissement à travers les trous traversants 30 de chacun des éléments de conversion thermoélectrique 3A, 3B. Le dispositif de refroidissement et de production d'énergie produit un gradient de température en refroidissant, grâce au fluide de refroidissement, les éléments de conversion thermoélectrique 3A, 3B auxquels de la chaleur est transmise depuis le corps d'absorption de chaleur 2 et fonctionne comme un refroidisseur tout en produisant de l'énergie.
PCT/JP2019/051116 2018-12-27 2019-12-26 Dispositif de refroidissement et de production d'énergie, et système de refroidissement et de production d'énergie utilisant ledit dispositif de refroidissement et de production d'énergie Ceased WO2020138288A1 (fr)

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JP2020562410A JPWO2020138288A1 (ja) 2018-12-27 2019-12-26 冷却兼発電装置および該冷却兼発電装置を用いた冷却兼発電システム

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JP2018244551 2018-12-27
JP2018-244551 2018-12-27

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5553470A (en) * 1978-10-14 1980-04-18 Ngk Insulators Ltd Thermoelectric generator
JP2010207077A (ja) * 2009-02-09 2010-09-16 Toshiba Corp 散気装置型熱電発電装置及び熱電発電散気システム
JP2017127186A (ja) * 2011-06-29 2017-07-20 ローズマウント インコーポレイテッド ワイヤレスデバイス用一体型熱電発電装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5553470A (en) * 1978-10-14 1980-04-18 Ngk Insulators Ltd Thermoelectric generator
JP2010207077A (ja) * 2009-02-09 2010-09-16 Toshiba Corp 散気装置型熱電発電装置及び熱電発電散気システム
JP2017127186A (ja) * 2011-06-29 2017-07-20 ローズマウント インコーポレイテッド ワイヤレスデバイス用一体型熱電発電装置

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