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High accuracy testbed for thermoelectric module characterization
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DOI：10.1016/j.enconman.2020.113325.png)
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摘要
En 中文
In this paper, we present an improved version of the unified method (UM) for thermo-electric modules (TEM) characterization with the aim to reduce the overall parameters uncertainty. The parameters that make up the commonly accepted figure of merit Z or z (T) over bar are mainly affected by temperature related uncertainty, which also significantly limit the precision of the test conditions and thus the reliability of derived models. To overcome these limitations, we conceived a novel and simplified measurement setup that relies at the same time on thermistor technology rather than thermocouple and on a lower number of required components. The improved setup, exploits a solid calibration procedure to reduce the uncertainty in temperature measurements from 1.4 degrees C typical of a J-type thermocouple (Class 1 IEC-EN 60584-2) to 0.027 degrees C with calibrated thermistors, leading to a previously unachievable millidegree-precision temperature control and to an uncertainty drop of two orders of magnitude in all the temperature-derived measurements. Such improvement has a direct feedback on both the as and Theta, leading to a drop of a least one order of magnitude for a Delta T of 3 degrees C and more than 44 times for the latter at 30 degrees C. As result, the figure of merit z (T) over bar now be determined with an uncertainty equal to 0.58%.
Keyword:
Thermoelectricity
Thermoelectric devices
Measurement uncertainty
Sensor characterization
Calibration
Temperature control
Automatic test equipment
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期刊
IF:
10.9
论文数:
2.0W
被引数:
11.3W
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The effect of temperature mismatch on thermoelectric generators electrically connected in series and parallel.png)
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