Segmented Thermoelectric Oxide-Based Module for High-Temperature Waste Heat Harvesting

Le Thanh Hung*, Ngo Van Nong, Li Han, Rasmus Bjørk, Pham Hoang Ngan, Tim C. Holgate, Benjamin Balke, G. Jeffrey Snyder, Søren Linderoth, Nini Pryds

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

We report a high-performance thermoelectric (TE) oxide-based module using the segmentation of half-Heusler Ti0.3Zr0.35Hf0.35CoSb0.8Sn0.2 and misfit-layered cobaltite Ca3Co4O9+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=700K attains a value of approximately 6.5kWm-2, which is threetimes 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 1073K and 444K, respectively, showed a promising result with 4% degradation for 48h operating in air.

Original languageEnglish (US)
Pages (from-to)1143-1151
Number of pages9
JournalEnergy Technology
Volume3
Issue number11
DOIs
StatePublished - Nov 1 2015

Keywords

  • Complex oxides
  • Energy conversion
  • Half-Heusler compounds
  • Thermoelectrics
  • Waste energy harvesting

ASJC Scopus subject areas

  • Energy(all)

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