Thermoelement (variants)
A technology of thermoelectric components and circuits, applied in the direction of electrical components, thermoelectric devices, thermoelectric device node lead-out materials, etc., to achieve high thermoelectric efficiency
Pending Publication Date: 2020-12-04
拉斯特克有限公司
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[0007] However, the strong dependence of the Z parameter on temperature is a limitation of this material
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[0018] An increase in the thermoelectric efficiency of the thermoelectric element according to the first embodiment is achieved due to the reduced negative effect of minority carriers on the value of the Seebeck coefficient and the corresponding Z parameter. This is because the Seebeck coefficient becomes anisotropic at elevated temperature due to the massive thermal generation of minority charge carriers. Therefore, the value of Seebeck coefficient for p-legs cut out from the transverse C-axis (standard direction) is smaller than that of p-legs cut parallel to the C-axis. As a result, the largest Z-parameter values were observed on the p-type legs parallel to the C-axis at higher operating temperatures.
[0019] Materials actually used in thermoelectric power generation applications are always polycrystalline or composite in nature.
[0020] Bi-based 2 Te 3 The main fabrication technique for series bulk materials of Alloy and related alloys is powder compaction by hot pr...
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The invention relates to the creation of a thermoelement for use in a thermoelectric battery for the direct conversion of thermal energy into electrical energy. The invention is directed toward achieving the technical result of improving the efficiency of a thermoelement. The present thermoelement consists of a p-leg and an n-leg interconnected in series in an electric circuit, the p-leg being based on a polycrystalline textured semiconductor material made from a solid solution of Bi2Te3-Sb2Te. In a first variant of the invention, in order to improve thermoelectric efficiency in a working temperature range of T>100, heat flow is directed from the hot end to the cold end in the p-leg along a crystallographic axis C. In order to improve thermoelectric efficiency in a working temperature range of T>100, heat flow is directed from the hot end to the cold end in the p-leg along a crystallographic axis C. In a second variant of the invention, in order to improve thermoelectric efficiency, the p-leg consists of two parts that are in electrical and thermal contact with one another, wherein heat flow in the first part is directed from a low-temperature side of the thermoelement perpendicular to axis C, and heat flow in the second part is directed from a high-temperature side along axis C.
Description
[0001] field of invention [0002] The present invention relates to a thermoelectric power generation device which realizes power generation by directly converting heat into electric energy by using a thermoelectric element and a temperature difference. Background technique [0003] A high priority issue in thermoelectric power generation technology is to increase the thermoelectric efficiency of thermoelectric devices. This is achieved by increasing the thermoelectric efficiency of thermoelectric materials over a wide operating temperature range (50°C to 350°C), which is represented by the material's figure-of-merit, or so-called Z-parameter, which defines for: [0004] [0005] Wherein, α is the Seebeck coefficient, σ is the electrical conductivity, and κ is the thermal conductivity of the thermoelectric material. [0006] A thermoelectric element consists of two legs made of p-type and n-type semiconductor material (p-type and n-type legs, respectively), which are conn...
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IPC IPC(8): H01L35/16H01L35/18
CPCH10N10/00H10N10/852H10N10/853
Inventor Z·M·达舍夫斯基L·D·杜德金S·Y·斯基皮达罗夫
Owner 拉斯特克有限公司