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ring-shaped thermoelectric device

A thermoelectric device and thermoelectric element technology, applied in the directions of thermoelectric device components, etc., can solve problems such as damage to annular thermoelectric elements, increase thermal stress of annular thermoelectric elements, complicated preparation process, etc., so as to improve the temperature difference between cold and hot ends and improve heat exchange efficiency. , the effect of high conversion efficiency

Active Publication Date: 2019-01-29
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

In 2007, Gao et al. reported the use of Cu as the electrode connection of Bi 2 Te 3 Thermoelectric material ring thermoelectric module (M. Gao and D.M. Rowe, Ring-structured Thermoelectric Module, Semicond. Sci. Technol. 22 (2007) 880-883), the preparation process is relatively complicated
First of all, when the annular thermoelectric element is integrated into a device, how to ensure the concentricity of each element after the element is integrated into the device; secondly, increasing the thickness (radial wall thickness) of the annular thermoelectric element will help improve the maximum output power and conversion efficiency, but excessive Improving the performance by increasing the thickness will bring about the problem of increasing the internal thermal stress of the ring-shaped thermoelectric element; third, in order to ensure that the ring-shaped thermoelectric device does not deform during use, it is necessary to use a certain thickness and strength on the inner and outer circular surfaces. Ceramic tubes (considering corrosion resistance and electrical insulation) are used to fix; Fourth, the annular thermoelectric device is fixed by the inner and outer ceramic tubes, and the thermal stress cannot be released when used in a large temperature difference environment, which will cause damage to the annular thermoelectric element

Method used

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Embodiment 1

[0063] In this embodiment, the conical thermoelectric element and its integrated ring-shaped thermoelectric device are designed according to the properties of the skutterudite material. The operating temperature of the annular device is from the hot end to 770K, and from the cold end to 320K.

[0064] The skutterudite material used is Yb 0.3 co 4 Sb 12 (n-type) and Ce 0.9 Fe 4 Sb 12 (p-type). The material of the metallization layer and the current-conducting electrode is Mo\Mo0.5Cu0.5, and the thickness n = 1 mm.

[0065] The structure of conical thermoelectric material component 1 is as follows figure 2 shown. The outer annulus of the annular device is the hot end, and the inner annulus is the cold end.

[0066] The dimensional parameters of the skutterudite material part are thickness m1 = 2 mm, outer diameter d1 = 16 mm, inner diameter d2 = 10 mm, and taper angle β = 35°. During preparation, p-type and n-type skutterudite material powder samples can be put into s...

Embodiment 2

[0070] In this embodiment, a bismuth telluride conical thermoelectric element and its integrated bismuth telluride ring-shaped thermoelectric device are designed according to the properties of the bismuth telluride material. The operating temperature of the annular device is from the hot end to 470K, and from the cold end to 320K.

[0071] The bismuth telluride material used is (Bi 2 Te 3 ) 0.90 (Sb 2 Te 3 ) 0.05 (Sb 2 Se 3 ) 0.05 (n-type) and (Bi 2 Te 3 ) 0.25 (Sb 2 Te 3 ) 0.72 (Sb 2 Se 3 ) 0.03 (p-type). The material of the metallization layer and the current-conducting electrode is Mo\Cu with a thickness of 1 mm.

[0072] The structure of conical thermoelectric material component 1 is as follows figure 2 shown. The outer annulus of the annular device is the hot end, and the inner annulus is the cold end.

[0073] The dimensional parameters of bismuth telluride material parts are thickness m1 = 1.5 mm, outer diameter d1 = 14 mm, inner diameter d2 = 10 m...

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Abstract

The invention relates to an annular structure thermoelectric device, which includes: conical thermoelectric elements and conical insulating and heat-insulating material components alternately arranged along the axial direction; each of the conical thermoelectric elements is connected in series. The annular structure thermoelectric device of the present invention has a reasonable structure and is conducive to cost control, performance optimization and mass production technology.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric conversion, and in particular relates to a ring-shaped thermoelectric device. Background technique [0002] As an environmentally friendly renewable energy technology, thermoelectric conversion technology has attracted widespread attention in the world in recent years. Thermoelectric power generation technology is a new technology that uses the Seebeck effect of semiconductor materials to directly convert temperature differences into electrical energy. This technology has the advantages of high reliability, no pollution and no noise, and it will have a good application prospect in high-tech fields such as the recovery and utilization of industrial waste heat and automobile exhaust waste heat, as well as military power supplies. [0003] A thermoelectric device is often composed of multiple n-type and p-type semiconductor thermoelectric elements. Since the voltage of each thermoelectric el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/02H10N10/80
Inventor 黄向阳柏胜强尹湘林仇鹏飞顾明陈立东
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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