Ultra-high-temperature electrocaloric heat pump

Klinar, Katja (avtor), Gačnik, Darja (avtor), Kitanovski, Andrej (avtor)

Nearly a quarter of waste heat is generated at temperatures exceeding 300°C, yet conventional heat pump technologies remain inefficient in recovering and utilizing heat from such high temperature sources. In this study, we introduce a novel electrocaloric heat pump designed to operate with heat sources and sinks at ultra-high temperatures. The proposed heat pump system incorporates an active electrocaloric regenerator featuring PbZr$_{0.52}$Ti$_{0.48}$O$_{3}$ (PZT) epitaxial thin-film multilayers, which exhibit a superior electrocaloric adiabatic temperature change of 11.03 K at 402°C (675 K), and pressurized helium gas as the working fluid. We conducted a parametric analysis to simulate the performance of the ultra-high-temperature electrocaloric heat pump and identified the optimal conditions for single- and multi-stage configurations. The single-stage setup achieved a maximum heating COP of 7.8 at a 30 K temperature span across the regenerator at a heat source temperature of 660 K. In comparison, the multi-stage configuration yielded the highest heating power 113.3 W/kg$_{EC}$ and a max. COP 2.7 between 630 and 690 K. This study established a foundation for notable advancements in ultra-high-temperature heat pumps by employing electrocaloric energy conversion.

• Jezik: Angleški jezik
• Ključne besede: heat pumps, high-temperature, electrocaloric materials, caloric materials, energy conversion, heat transfer, regenerators, solid-state
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2026
• Št. strani: 11 str.
• Številčenje: Vol. 349, art. 120814
• PID: 20.500.12556/RUL-177429
• UDK: 621.577:536.2
• ISSN pri članku: 0196-8904
• DOI: 10.1016/j.enconman.2025.120814
• COBISS.SI-ID: 262744067
• Datum objave v RUL: 23.12.2025

Gradivo je del revije

• Naslov: Energy conversion and management
• Skrajšan naslov: Energy convers. manage.
• Založnik: Elsevier
• ISSN: 0196-8904
• COBISS.SI-ID: 2618919

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: toplotne črpalke, visoke temperature, elektrokalorika, pretvorba energije, prenos toplote, regeneratorji, stanje trdnosti

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P2-0223
• Naslov: Prenos toplote in snovi