A Dual PCM Thermal Battery Delivering More Than 80 kW of Discharge Power Despite The Low Thermal Conductivity of Organic PCM
有機PCMの低熱伝導率にもかかわらず80kW以上の放電電力を供給するデュアルPCMサーマルバッテリー (AI 翻訳)
Robadey J, Liechti M, Nguyen D, Lalou MJ
🤖 gxceed AI 要約
日本語
再生可能エネルギーの分散化に伴い、高エネルギー密度の蓄熱技術が求められる中、本研究は相変化材料（PCM）の低熱伝導率を補うために熱交換器設計を最適化し、家庭用の蓄熱デモ機で80kW超の放電電力を達成した。0.78m³のコンパクトな体積で、熱伝導率0.16W/mKのPCMを用いながら、80m²の伝熱面積と約1mmの伝導経路を実現した。熱交換器形状がPCMの熱伝導率向上よりも重要であることを示した。
English
This study demonstrates that optimized heat-exchanger design can overcome the low thermal conductivity of phase change materials (PCMs) in thermal energy storage. A prototype for domestic hot water and space heating achieved discharge powers exceeding 80 kW within a compact 0.78 m³ volume, using 80 m² of heat-transfer area and limiting conduction paths to ~1 mm. The results highlight heat-exchanger geometry as the key design parameter for high-power PCM storage, supporting decentralized renewable energy integration.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本の家庭用蓄熱システムや再生可能エネルギー導入拡大に寄与する可能性がある。特に、ヒートポンプや太陽熱利用との組み合わせで、電力需給調整や省エネに貢献できる。ただし、実用化にはコストや耐久性の検証が必要。
In the global GX context
This research contributes to global efforts in thermal energy storage for renewable integration, offering a design principle that could lower costs and improve performance of PCM systems. It aligns with the need for scalable storage solutions to support the transition to low-carbon energy systems, relevant to ISSB and TCFD contexts where energy storage is a key mitigation technology.
👥 読者別の含意
🔬研究者:Provides evidence that heat-exchanger design can compensate for low PCM conductivity, guiding future thermal storage research.
🏢実務担当者:Offers a design approach for compact, high-power thermal storage that could be integrated into building energy systems.
🏛政策担当者:Highlights the potential of PCM storage for renewable integration, informing policies that support decentralized energy storage.
📄 Abstract（原文）
The increasing deployment of decentralized renewable energy systems requires sus-tainable, affordable, and high-energy-density storage technologies. While thermal en-ergy storage using phase change materials (PCMs) represents a promising solution, its widespread adoption remains limited by the low thermal conductivity of most PCMs, which restricts (dis)charge power. This work demonstrates that high discharge powers can be achieved through optimized heat-exchanger design without enhancing the in-trinsic thermal conductivity of the PCM. After dimensioning simulations for individual homes, a thermal storage demonstrator integrating water heat exchangers immersed in two PCM reservoirs for domestic hot water and space heating was designed and ex-perimentally investigated. The prototype achieved discharge powers exceeding 80 kW, while maintaining 65 kW at breakthrough, within a compact volume of 0.78 m³ despite the low PCM thermal conductivity of only 0.16 Wm⁻¹K⁻¹. This performance is enabled by a global heat-exchanger design providing 80 m² of heat-transfer area while limiting the PCM conduction path to about 1 mm. Thermosiphon-driven natural convection was also observed during melting and may further enhance heat transfer. These results demonstrate that heat-exchanger geometry, rather than enhanced PCM conductivity, is the key design parameter for achieving compact, high-power PCM thermal energy storage.
🔗 Provenance — このレコードを発見したソース
- Research Square https://doi.org/10.20944/preprints202608.0055.v1first seen 2026-08-07 04:39:03
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