Segmented Thermoelectric Oxide-Based Module for High-Temperature Waste Heat Harvesting
Abstract
We report a high-performance thermoelectric (TE) oxide-based module using the segmentation of half-Heusler Ti_(0.3)Zr_(0.35)Hf_(0.35)CoSb_(0.8)Sn_(0.2) and misfit-layered cobaltite Ca_3Co_4O_(9+δ) as the p-leg and 2 % Al-doped ZnO as the n-leg. The maximum output power of a 4-couple segmented module at ΔT=700 K attains a value of approximately 6.5 kW m^(−2), which is three times higher than that of the best reported non-segmented oxide module. The TE properties of individual legs, as well as the interfacial contact resistances, were characterized as a function of temperature. Numerical modeling was used to predict the efficiency and to evaluate the influence of the electrical and thermal losses on the performance of TE modules. Initial long-term stability tests of the module at the hot and the cold side temperatures of 1073 K and 444 K, respectively, showed a promising result with 4 % degradation for 48 h operating in air.
Additional Information
© 2015 John Wiley & Sons, Inc. Manuscript Revised: 9 July 2015; Manuscript Received: 9 June 2015; First published: 27 August 2015.Additional details
- Eprint ID
- 62596
- Resolver ID
- CaltechAUTHORS:20151204-074554723
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2015-12-04Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field