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Enhancing efficiency in electrocaloric cooling: a study on voltage-dependent material losses.

Number: 0025

Author(s) : BARON C., LEFEUVRE E., PARRAIN F., LOBUE M., ALMANZA M.

Summary

Electrocaloric P(VDF-TrFE-CFE) (PVDF) films are routinely characterized using sinusoidal excitation at a few hundred hertz, yet this approach overlooks the profound influence of excitation profiles on material losses. Here, we compare losses under sinusoidal/trapezoidal waveforms (high-voltage amplifier) and practical power supplies (half-bridge/flyback). Strikingly, losses increase by 200-300% when using such power supplies, revealing that real-world driving conditions can dominate performance. These findings challenge the relevance of standard loss metrics and emphasize the need to co-optimize power supply and materials in electrocaloric devices.

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  • Original title: Enhancing efficiency in electrocaloric cooling: a study on voltage-dependent material losses.
  • Record ID : 30035074
  • Languages: English
  • Subject: Technology
  • Source: 11th IIR Conference on Solid-State Cooling, Heating and Energy Harvesting.
  • Publication date: 2026/06/07
  • DOI: http://dx.doi.org/10.18462/iir.thermag.2026.0025

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