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提出时域阻抗谱法，以便在数分钟内确定热电模块精确的无量纲品质因数。

Proposal of time domain impedance spectroscopy to determine precise dimensionless figure of merit for thermoelectric modules within minutes.

作者信息

Hasegawa Yasuhiro, Takeuchi Mai

机构信息

Graduate School of Science and Engineering, Saitama University, 255, Shimo-okubo, Sakura, Saitama, 338-8570, Japan.

出版信息

Sci Rep. 2022 Jul 13;12(1):11967. doi: 10.1038/s41598-022-15947-4.

DOI:10.1038/s41598-022-15947-4
PMID:35831398
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9279445/
Abstract

Several techniques exist that use a thermoelectric element (TE) or module (TM) to measure precise dimensionless figure of merit (zT), both qualitatively and quantitatively. The techniques can be applied using both alternating (AC) and direct current (DC). Herein, the transient Harman (TH) and impedance spectroscopy (IS) methods were investigated as direct zT measurement techniques using identical TM, which showed that zT at 300 K was 0.767 and 0.811 within several minutes and several hours, respectively. The zT values differed despite the use of the same TM, which revealed that measuring ohmic resistance using DC and pulse DC is potentially misleading owing to the influence of Peltier heat on current flow. In this study, time domain impedance spectroscopy (TDIS) was proposed as a new technique to measure zT using proper DC and AC. zT obtained using TDIS was 0.811 within several minutes using the time and frequency domains, and was perfectly consistent with the result of the IS method. In conclusion, the TDIS is highly appropriate in estimating zT directly using only proper electrometric measurements, and without any heat measurements.

摘要

有几种技术可利用热电元件（TE）或模块（TM）定性和定量地测量精确的无量纲品质因数（zT）。这些技术可使用交流电（AC）和直流电（DC）来应用。在此，研究了瞬态哈曼（TH）和阻抗谱（IS）方法作为使用相同TM的直接zT测量技术，结果表明在300 K时，分别在几分钟和几小时内zT值为0.767和0.811。尽管使用了相同的TM，但zT值仍有所不同，这表明由于珀尔帖热对电流流动的影响，使用直流和脉冲直流测量欧姆电阻可能会产生误导。在本研究中，提出了时域阻抗谱（TDIS）作为一种使用适当的直流和交流来测量zT的新技术。使用TDIS在几分钟内通过时域和频域获得的zT为0.811，与IS方法的结果完全一致。总之，TDIS非常适合仅通过适当的电测量直接估计zT，而无需任何热测量。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0624/9279445/78a81f0cb87b/41598_2022_15947_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0624/9279445/c6720a1378a0/41598_2022_15947_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0624/9279445/aaf506880f27/41598_2022_15947_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0624/9279445/fd34b3e3a4fb/41598_2022_15947_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0624/9279445/666781cf0116/41598_2022_15947_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0624/9279445/516e3497c229/41598_2022_15947_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0624/9279445/5f647741d965/41598_2022_15947_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0624/9279445/78a81f0cb87b/41598_2022_15947_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0624/9279445/c6720a1378a0/41598_2022_15947_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0624/9279445/aaf506880f27/41598_2022_15947_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0624/9279445/fd34b3e3a4fb/41598_2022_15947_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0624/9279445/666781cf0116/41598_2022_15947_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0624/9279445/516e3497c229/41598_2022_15947_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0624/9279445/5f647741d965/41598_2022_15947_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0624/9279445/78a81f0cb87b/41598_2022_15947_Fig7_HTML.jpg

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