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Detecting method for thermoelectric conversion efficiency of thermoelectric element device

A technology of thermoelectric conversion and testing method, which is applied in the direction of instruments, thermometers, measuring devices, etc., which can solve the problems that the measurement accuracy of thermoelectric conversion efficiency is difficult to guarantee and difficult to measure, so as to improve the measurement accuracy and avoid the effect of side convection

Inactive Publication Date: 2006-06-07
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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Problems solved by technology

However, the measurement of thermal power is difficult to measure due to heat losses such as radiation and convection flowing through thermoelectric elements or single-couple heat, and the measurement accuracy of thermoelectric conversion efficiency is difficult to guarantee

Method used

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  • Detecting method for thermoelectric conversion efficiency of thermoelectric element device
  • Detecting method for thermoelectric conversion efficiency of thermoelectric element device
  • Detecting method for thermoelectric conversion efficiency of thermoelectric element device

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Clamp the electric heater 1, the thermocouple 2, the thermoelectric power meter 3, and the heat tank 4 sequentially from top to bottom on the test bench 6, and place a layer of heat preservation material 6 on the electric heater 1. Install temperature measuring thermocouples on the hot and cold surfaces of the thermoelectric single couple, respectively install temperature measuring thermocouples on the upper and lower sides of the thermoelectric power meter, install electrical output leads on the thermoelectric single couple, and install electrical output leads on the thermoelectric power meter. The thermocouple and the electrical output leads are respectively connected with the temperature measuring instrument and the voltage measuring instrument.

[0024] The thermoelectric coupler is connected to a resistive load. Heat up the electric heater, and adjust the temperature of the hot tank at the same time, so that the temperature of the hot surface and cold surface of th...

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Abstract

The detecting method of thermoelectric conversion efficiency of thermoelectric element or device includes the following steps: 1. measuring the electric power P of thermoelectric element or device with a common power meter; 2. measuring thermal potential E with a thermoelectric power meter set in the cold side of the thermoelectric element or device and calculating the thermal power Q by means of the formula Q=AE+B, where A and B are determined through calibrating the thermoelectric power meter; and 3. calculating the thermoelectric conversion efficiency Eta of thermoelectric element or device by means of the formula Eta=P / Q+P. Owing to measuring the thermal power the cold side of the thermoelectric element or device outputs, rather than the input thermal power, the present invention avoids the heat loss of side convection of the thermoelectric element or device and has raised measurement precision of thermoelectric conversion efficiency.

Description

technical field [0001] The invention belongs to the technical field of thermoelectricity, in particular to a method for testing thermoelectric conversion efficiency of thermoelectric components. Background technique [0002] The currently disclosed thermoelectric conversion efficiency of a thermoelectric element or a thermoelectric couple is defined as the electric power emitted by a thermoelectric element or a thermoelectric couple divided by the thermal power input by a hot surface at a specified temperature of a hot surface and a cold surface. Therefore, the thermoelectric conversion efficiency of a thermoelectric element or a thermoelectric couple is usually calculated by measuring the thermal power input and the electrical power emitted by a thermoelectric element or a thermoelectric couple hot surface. Generally speaking, the determination of electric power is relatively easy and the accuracy is high. The measurement of thermal power is difficult to measure due to hea...

Claims

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Application Information

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IPC IPC(8): G01K3/00G01K7/02
Inventor 张建中王泽深任保国张丽丽郑海山
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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