閉鎖型および半開放型圧縮CO2エネルギー貯蔵システムの熱力学・経済性比較分析
Comparative Thermodynamic and Economic Analysis of Closed and Semi-Open Compressed Carbon Dioxide Energy Storage Systems (原題)
Yifu Zhang, Yuming Liu, 吳祖漢, Jingyue Sun, Yu Xu, Cong Chen
🤖 gxceed AI 要約
日本語
本研究は、長期エネルギー貯蔵のための圧縮CO2エネルギー貯蔵（CCES）システムを2つ提案し、熱力学・経済性を比較した。閉鎖型はサイクル効率62.25%、半開放型はエネルギー貯蔵密度7.38×10^7 J/m^3を達成。経済分析では閉鎖型のLCOEが0.0808 $/kWhと優位で、実用化への基盤を提供する。
English
This study proposes two compressed CO2 energy storage (CCES) systems for long-duration storage, comparing thermodynamics and economics. The closed system achieves 62.25% cycle efficiency, while the semi-open system reaches 7.38×10^7 J/m^3 energy density. Economic analysis shows the closed system has a lower LCOE of 0.0808 $/kWh, providing a basis for practical implementation.
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
日本の再エネ導入拡大に伴う長期貯蔵需要に応える技術。CCESは地熱や廃熱利用とも親和性が高く、電力系統の安定化やカーボンニュートラル目標達成に寄与する。経済性評価は日本の電力市場での導入判断に有用。
In the global GX context
This paper contributes to global long-duration energy storage research, relevant for integrating variable renewables. The economic analysis (LCOE) provides benchmarks for CCES technology, which is emerging as an alternative to lithium-ion and pumped hydro. The findings support investment decisions in storage infrastructure for grid decarbonization.
👥 読者別の含意
🔬研究者:Provides thermodynamic and economic benchmarks for CCES systems, useful for further optimization and comparison with other storage technologies.
🏢実務担当者:Offers LCOE data and system design insights for evaluating CCES as a viable storage option in renewable projects.
🏛政策担当者:Highlights the potential of CCES for long-duration storage, informing energy policy and storage deployment incentives.
📄 Abstract（原文）
Long-duration energy storage (ES) has aroused widespread concern by virtue of its potential in renewable energy consumption and the achievement of carbon neutrality goals. Compressed Carbon Dioxide Energy Storage (CCES) works as one of the most attractive technologies for long-duration ES. However, efficient and economical CCES systems are still lacking. In the present study, two novel CCES systems have been proposed, namely Closed-CCES and Semi-open-CCES. Under typical design conditions, the Closed-CCES system achieves a cycle efficiency of 62.25%, whereas the Semi-open-CCES system, featuring simultaneous cooling, heating, and power outputs, attains a superior energy storage density (ESD) of 7.38 × 107 J·m−3. Compared with comparable energy storage systems, the two proposed systems exhibit distinct advantages in cycle efficiency and energy storage density, respectively. As noted by exergy analysis, the key loss source of Closed-CCES is the heat exchanger HE2, while the loss of Semi-open-CCES is mainly concentrated in the thermal storage device HFT1. Sensitivity analysis shows that ambient temperature and thermal storage pressure slightly affect the performance of both systems, while heat exchanger efficiency impacts the performance of Closed-CCES more significantly. Economic assessments reveal that both systems outperform conventional technologies in levelized cost of electricity (LCOE). The Closed-CCES system demonstrates superior economic viability with a lower LCOE of 0.0808 $/kW·h versus 0.0985 $/kW·h for the Semi-open system, with the advantage persisting in various operational scenarios. Research results provide a basis for the practical engineering implementation of CCES technology, contributing to the broader pursuit of long-duration energy storage solutions for carbon neutrality.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/su18178659first seen 2026-08-26 04:48:29
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