Harman Measurements for Thermoelectric Materials and Modules under Non-Adiabatic Conditions

Im Jun Roh, Yun Goo Lee, Min Su Kang, Jae Uk Lee, Seung Hyub Baek, Seong Keun Kim, Byeong Kwon Ju, Dow Bin Hyun, Jin Sang Kim, Beomjin Kwon

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9 Citations (Scopus)

Abstract

Accuracy of the Harman measurement largely depends on the heat transfer between the sample and its surroundings, so-called parasitic thermal effects (PTEs). Similar to the material evaluations, measuring thermoelectric modules (TEMs) is also affected by the PTEs especially when measuring under atmospheric condition. Here, we study the correction methods for the Harman measurements with systematically varied samples (both bulk materials and TEMs) at various conditions. Among several PTEs, the heat transfer via electric wires is critical. Thus, we estimate the thermal conductance of the electric wires, and correct the measured properties for a certain sample shape and measuring temperature. The PTEs are responsible for the underestimation of the TEM properties especially under atmospheric conditions (10-35%). This study will be useful to accurately characterize the thermoelectric properties of materials and modules.

Original languageEnglish
Article number39131
JournalScientific Reports
Volume6
DOIs
Publication statusPublished - 2016 Dec 14

ASJC Scopus subject areas

  • General

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    Roh, I. J., Lee, Y. G., Kang, M. S., Lee, J. U., Baek, S. H., Kim, S. K., Ju, B. K., Hyun, D. B., Kim, J. S., & Kwon, B. (2016). Harman Measurements for Thermoelectric Materials and Modules under Non-Adiabatic Conditions. Scientific Reports, 6, [39131]. https://doi.org/10.1038/srep39131