Electrocaloric Refrigeration using Multi-Layers of Electrocaloric Material Films and Thermal Switches

Shigeki Hirasawa, Tsuyoshi Kawanami, Katsuaki Shirai

Research output: Contribution to journalArticle

Abstract

The electrocaloric effect in thin films of electrocaloric material has the potential to be used for efficient cooling systems. We numerically calculated the effect of the parameters in electrocaloric refrigeration with multi-layers of electrocaloric material films and thermal switches by changing the contact thermal conductance to improve thermal performance. It was found that the average heat transfer efficiency was 10% and the average heat flux transferred to the cold side of the system was 2.4 × 104 W/m2 for the standard conditions of a frequency of 100 Hz and a temperature difference between the hot side and the cold side of the system of 20 K. The average heat flux transferred to the cold side of the system was maximum when the thickness of the electrocaloric material was 70 µm and thickness of the heat storage material 100 µm. The average heat transfer efficiency was maximum at the two layers of the electrocaloric material.

Original languageEnglish
Pages (from-to)1091-1099
Number of pages9
JournalHeat Transfer Engineering
Volume39
Issue number12
DOIs
Publication statusPublished - 2018 Jul 21
Externally publishedYes

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Refrigeration
switches
Switches
heat flux
heat transfer
Heat flux
heat storage
cooling systems
Heat transfer
Heat storage
temperature gradients
Cooling systems
Hot Temperature
thin films
Thin films
Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

Electrocaloric Refrigeration using Multi-Layers of Electrocaloric Material Films and Thermal Switches. / Hirasawa, Shigeki; Kawanami, Tsuyoshi; Shirai, Katsuaki.

In: Heat Transfer Engineering, Vol. 39, No. 12, 21.07.2018, p. 1091-1099.

Research output: Contribution to journalArticle

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