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Thermoelectric power generation device

A technology of thermoelectric power generation and thermal power generation, which is applied in the direction of exhaust devices, noise reduction devices, generators/motors, etc., which can solve the problems of material costs, increased manufacturing costs, inability to exert stable power generation performance, and no contribution to heat exchange performance, etc.

Inactive Publication Date: 2018-05-11
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] According to the technology of the above-mentioned Patent Document 1, new fastening members such as bolts for fastening are required, the number of parts increases, and the material cost and manufacturing cost of the product increase.
In addition, such an increase in the number of components results in an increase in heat capacity that does not contribute to heat exchange performance
Therefore, if the effective heat transfer amount at the initial stage of operation of the power generation device decreases, the accompanying decrease in the amount of power generation occurs, and sufficient performance cannot be obtained.
In addition, the surface pressure of the pressure contact part decreases due to the loosening of the bolt, so stable power generation performance may not be exhibited.

Method used

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no. 1 approach

[0027] Hereinafter, regarding the first embodiment, use Figure 1 to Figure 6 Describe in detail. figure 1 is a partial cross-sectional structural view of the thermoelectric power generation device 100 . In order to prevent oxidation of elements, the power generating modules 1 and 2 are housed in a flat box-shaped airtight case. Therefore, the power generation modules 1 and 2 can only be seen as plate-shaped boxes from the outside, but inside the airtight case made of thin stainless steel, a plurality of P-type semiconductor elements and N-type semiconductor elements are alternately connected to form a network. shape. In the power generation module, one surface is in contact with the high temperature part and the other surface is in contact with the low temperature part to generate electricity. When distinguishing the power generation components 1 and 2, they are also referred to as the first power generation component 1 and the second power generation component 2 .

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no. 2 approach

[0046] Next, a second embodiment will be described. In addition, regarding 2nd Embodiment, the same code|symbol as 1st Embodiment represents the same structure below, and the previous description is quoted.

[0047] Figure 7 The front structure of the thermoelectric power generation device of 2nd Embodiment is shown. Such as Figure 7 As shown, in the second embodiment, the vertical dimension of the pipe 7 arranged in the center is enlarged, and the first power generation module 1 and the second power generation module 2 arranged above and below the pipe 7 are easily aligned by thermal expansion. The action is based on the pressurized force of thermal expansion. Here, the aspect ratio is the ratio of the long side to the short side of the rectangle. Such as Figure 7 As shown, the inside of the duct 7 is divided into a plurality of divided passages 7a, and the cross-sectional shape of each divided passage 7a is a rectangle. The engine cooling water flows through the div...

no. 3 approach

[0052] Next, a third embodiment will be described. Portions different from the above-described embodiment will be described. exist Figure 8 Among them, between the first outer plate 3 and the second outer plate 4 , the first power generating module 1 and the second power generating module 2 are arranged in contact with the first outer plate 3 and the second outer plate 4 . Furthermore, the duct 7 is disposed between the first power generation module 1 and the second power generation module 2 , but the duct 7 is divided into a first duct 701 and a second duct 702 . And, between the first pipe 701 and the second pipe 702 , the center member 8 having a higher coefficient of thermal expansion than the first pipe 701 and the second pipe 702 is arranged. The core member 8 is not inserted into the path of heat transfer required for power generation, so the thermal resistance of the heat transfer path does not increase. For the core member 8, other than metal, synthetic resin or c...

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Abstract

A thermoelectric power generation device is provided with: a duct (7) through the inside of which a first fluid flows; a first power generation module (1) and a second power generation module (2) respectively making contact with outer surfaces of the duct facing each other and each internally provided with a thermoelectric power generation element; a first outer plate (3) and a second outer plate(4) making contact with outer surfaces of the respective power generation modules on the side opposite to the duct and welded to each other at both ends thereof; and outside fins (5, 6) respectively provided on outer surfaces of the first and second outer plates on the side opposite to the respective power generation modules and making contact with a second fluid flowing thereover, said second fluid having a higher temperature than the first fluid. Portions between the respective power generation modules and the duct and portions between the respective power generation modules and the first and second outer plates are mutually pressured and contacted. The duct is formed of a material having a larger thermal expansion coefficient than the first and second outer plates. Two power generationmodules are not necessarily required. At least one power generation module (1 or 2) may be provided.

Description

[0001] Cross-reference of related applications [0002] This application is based on Japanese Patent Application No. 2015-183256 filed on September 16, 2015, the disclosure of which is incorporated herein by reference. technical field [0003] The present invention relates to a thermoelectric power generation device that utilizes high-temperature fluid and low-temperature fluid to perform thermoelectric power generation. In particular, it relates to a thermoelectric power generation device using exhaust gas from a vehicle. Background technique [0004] Conventionally, there is a thermoelectric power generation device as described in Patent Document 1. In this device, a large number of thermoelectric components can be pressed and fixed by a small number of low-temperature cooling medium blocks and fastening members. In addition, a large number of thermoelectric modules can be easily sandwiched between the high-temperature medium flow pipe and the cooling medium flow block a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N11/00H01L35/30
CPCH02N11/00F01N5/025Y02T10/12H10N10/01H10N10/17H10N10/13H02N11/002
Inventor 松田拓也北川新也冈本义之
Owner DENSO CORP