Thin-film thermoelectric cooler: Thermodynamic modelling and its temperature-entropy flux formulation

A. Chakraborty, B. B. Saha, S. Koyama, K. C. Ng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Thermodynamic performances of a thin-film thermoelectric cooler are analysed from the point of view of irreversible thermodynamics using the Boltzmann transport equation, which includes the collision effects as well as those accounted for by the Gibbs law. Using this methodology, the article presents unique conservation equations for electrons, holes, and phonons as well as their necessary expressions for entropy generation within the thin films. A temperature-entropy (T-s) diagram is plotted for describing the processes of a thin-film thermoelectric cooler. This diagram demarcates how the energy input to the thin films could be apportioned and utilize in overcoming the dissipative and finite heat transfer losses. The dissipative effects of electron-hole collisions at high current densities have been found to be significant, up to 25 per cent of the total power input in a current field exceeding 2 A within the thin films.

Original languageEnglish (US)
Pages (from-to)33-46
Number of pages14
JournalProceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering
Volume221
Issue number1
DOIs
StatePublished - Feb 2007
Externally publishedYes

Keywords

  • And phonons
  • Boltzmann transport
  • Collisions of electrons
  • Entropy generation
  • Holes
  • T-s diagrams
  • Thermodynamic modelling
  • Thin films thermoelectrics

ASJC Scopus subject areas

  • Mechanical Engineering

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