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Characterization of Thermal Transport in One-dimensional Solid Materials
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Non-contact method for characterization of small size thermoelectric modules.

Michael Manno1, Bao Yang1, Avram Bar-Cohen1

  • 1Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, USA.

The Review of Scientific Instruments
|September 3, 2015
PubMed
Summary

This study introduces a non-contact method for characterizing thermoelectric coolers, improving accuracy for mini to micro-scale devices. This novel technique avoids errors from traditional contact measurements, enhancing thermoelectric performance analysis.

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Area of Science:

  • Materials Science
  • Thermal Engineering
  • Nanotechnology

Background:

  • Conventional thermoelectric characterization methods rely on direct contact, leading to errors with miniaturized devices.
  • Accurate measurement of temperature difference (ΔT) and heat pumping is crucial for thermoelectric cooler (TEC) performance.
  • Existing techniques struggle with small sample sizes and high heat fluxes in thin-film TECs.

Purpose of the Study:

  • To develop and demonstrate a non-contact technique for characterizing mini to micro-scale thin-film thermoelectric coolers.
  • To eliminate measurement errors associated with traditional contact-based methods like thermocouples and heat flux sensors.
  • To accurately measure maximum ΔT and maximum heat pumping capacity of small-sized TECs.

Main Methods:

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  • Utilized an infrared camera to measure the hot and cold side temperatures of the thermoelectric device, determining ΔT.
  • Employed a laser to apply heat to the cold side of the thermoelectric module for heat pumping capacity characterization.
  • Validated the non-contact technique by testing a thin-film thermoelectric module and comparing results with literature data.

    • Main Results:

    • The non-contact method accurately measures the maximum ΔT and heat pumping capacity of thin-film thermoelectric coolers.
    • The technique effectively eliminates errors inherent in contact-based measurements for small-scale devices.
    • Experimental results obtained using the non-contact approach showed good agreement with published data.

    Conclusions:

    • The developed non-contact characterization technique offers a reliable and accurate alternative for evaluating mini to micro-scale thin-film thermoelectric coolers.
    • This method significantly improves the precision of thermoelectric performance measurements, especially for miniaturized devices.
    • The non-contact approach demonstrates broad applicability and potential for advancing thermoelectric device research and development.