How highly efficient power electronics transfers high electrocaloric material performance to heat pump systems

IF 0.8 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY MRS Advances Pub Date : 2023-10-31 DOI:10.1557/s43580-023-00670-7

Stefan Mönch, Richard Reiner, Patrick Waltereit, Michael Basler, Rüdiger Quay, Sylvia Gebhardt, Christian Molin, David Bach, Roland Binninger, Kilian Bartholomé

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Abstract

Abstract Electrocaloric heat pumps for cooling or heating are an emerging emission-free technology, which could replace vapor-compression systems, harmful refrigerants, and mechanical compressors by a solid-state solution with theoretically even higher coefficient of performance. Existing electrocaloric ceramics could reach around 85% of the Carnot-limit, and existing electrocaloric polymers could enable a compact and high power density system. However, the performance of published system demonstrators stays significantly below this performance, partly because of the external electronic charging loss (cyclic charging/discharging of electrocaloric capacitors). This work analyzes how the latest 99.74% ultra-efficient power electronics enables to maintain a high performance even at the system level. A first-principle analysis on material and system parameters also shows the effect of significantly different material properties of ceramics (PMN, PST) and PVDF-based polymers on system parameters. A system benchmark provides insight into system characteristics not covered by material analysis. Graphical abstract

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高效电力电子如何将高电热材料性能转移到热泵系统

摘要:用于制冷或制热的电热泵是一种新兴的零排放技术，它可以取代蒸汽压缩系统、有害制冷剂和机械压缩机，理论上具有更高的性能系数。现有的电热陶瓷可以达到卡诺极限的85%左右，现有的电热聚合物可以实现紧凑和高功率密度的系统。然而，已发表的系统演示的性能远远低于这一性能，部分原因是外部电子充电损失(电热电容器的循环充电/放电)。这项工作分析了最新的99.74%超高效率电力电子设备如何在系统级保持高性能。对材料和系统参数的第一性原理分析还表明，陶瓷(PMN, PST)和pvdf基聚合物的材料性能差异对系统参数的影响显著。系统基准提供了对材料分析未涵盖的系统特征的深入了解。图形抽象

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