[16a-D411-1~7] 9.4 Thermoelectric conversion

[16a-D411-6] Energy-balance based method for measuring the Peltier coefficient
without prior information of the sample’s thermophysical property and dimension

〇Yasutaka Amagai¹, Takeshi Shimazaki¹, Kenjiro Okawa¹, Norihiko Sakamoto¹, Nobu-Hisa Kaneko¹ (1.AIST)

Keywords:Thermoelectric generation and cooling, Thermoelectric material, Peltier effect

We propose a simple and accurate method to determine the intrinsic Peltier coefficient of the thermoelectric materials from a temperature profile when ac and dc current is alternatively applied in a single run. The thermal analysis leads to a general relation between the Peltier coefficient and temperature profile, where the Peltier coefficient is linked to the temperature gradient caused by the Peltier effect, temperature rise by the Joule effect, the sample’s electrical resistance, and amplitude of the flowing current. One of the decisive advantages is our measurement equation does not contain any of sample’s thermal conductivity, dimension or heat flux as unknown parameters. We hope that this measurement method of the Peltier coefficient will help to verify the accuracy of the Seebeck coefficient in a more accurate manner.