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

Title
Harman Measurements for Thermoelectric Materials and Modules under Non-Adiabatic Conditions
Authors
현도빈김진상백승협김성근권범진노임준이윤구강민수이재욱주병권
Keywords
Thermoelectric; Measurement; Materials; Modules; Harman method; Parasitic thermal effects
Issue Date
2016-12
Publisher
Scientific Reports
Citation
VOL 6-10
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.
URI
http://pubs.kist.re.kr/handle/201004/65223
ISSN
2045-2322
Appears in Collections:
KIST Publication > Article
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