← 論文一覧に戻る

石炭火力発電所の廃熱利用に基づく炭素回収加熱システムの構築とエネルギー消費分析

Construction and energy-consumption analysis of a carbon capture heating system based on waste heat utilization in a coal-fired power plant (原題)

Zhaoyu Yang, Suxia Ma, Guanjia Zhao, Jing Xu

Energy📚 査読済 / ジャーナル2026-10-22#CCUSOrigin: CN経営インパクト: コスト削減対象セクター: power
DOI: 10.1016/j.energy.2026.142819
原典: https://doi.org/10.1016/j.energy.2026.142819

🤖 gxceed AI 要約

日本語

MEA吸収液を用いた燃焼後CO2回収の再生塔熱を、抽気蒸気ではなく圧縮ヒートポンプと排ガス廃熱で段階的に供給する方式を600MW機で設計。EbsilonとAspen Plusの連成モデルとIGWO最適化により、LCOCを負荷に応じ最大約20%削減し、エネルギー利用率を平均11.4%向上。低品位廃熱で高品位抽気を代替できることを広負荷域で示した。

English

This study designs a staged heat-supply scheme for MEA post-combustion CO2 capture on a 600 MW coal unit, using compression heat pumps and flue-gas waste heat instead of high-grade extraction steam. Coupled Ebsilon/Aspen Plus simulations with IGWO optimization show LCOC reductions of up to ~20% across 40-100% load and an 11.4% average gain in energy utilization. It demonstrates that in-plant low-grade waste heat can substitute extraction steam over a wide load range.

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

日本は石炭火力の段階的廃止とCCUS実装の両立が政策課題であり、回収コスト低減はGX推進・トランジション政策の実装可能性に直結する。廃熱利用による省エネ設計は国内発電事業者の改修投資判断に示唆を与える。

In the global GX context

As global disclosure frameworks (ISSB, TCFD) push emitters to substantiate transition plans, cost-effective retrofit pathways for existing coal assets matter for credible decarbonization claims. This work offers quantitative evidence on lowering capture costs via waste-heat integration, relevant to transition finance and CCUS deployment debates.

👥 読者別の含意

🔬研究者:廃熱統合と最適化を組み合わせたCCUS回収コスト低減の定量手法として参照できる。

🏢実務担当者:既存石炭・ガス火力のCCUS改修における抽気蒸気削減とコスト低減の設計指針になる。

🏛政策担当者:石炭火力のトランジション政策やCCUS支援策の費用対効果評価に活用できる。

📄 Abstract（原文）

Conventionally, the heat of the reboiler in monoethanolamine (MEA)-based post-combustion CO 2 capture (PCC) system is supplied by intermediate-pressure extraction steam which temperature is higher than the needed, causing energy losses and capture cost increases. This study develops a staged, synergistic heat-supply scheme for a 600 MW unit, featuring exhaust-steam dominance, flue-gas-heat compensation and minimal extraction steam as backup. Low-pressure exhaust-steam heat is upgraded by a compression heat pump and converted to reboiler via flashing, while the waste heat of tail-end flue-gas is recovered through a closed-cycle water loop and delivered to the reboiler via water-water heat exchange and flashing; the extraction steam is introduced only to minimally close the heat balance when waste heat is insufficient. A coupled unit-PCC model is established in Ebsilon and Aspen Plus, and steady-state simulations are performed at 100%/75%/60%/50%/40% THA, followed by improved grey wolf optimizer (IGWO) optimization with the levelized cost of CO 2 capture (LCOC) as the objective. At 0.01 MPa back pressure, the proposed waste-heat strategy reduces LCOC by 19.96%, 13.57%, 11.59%, 9.64% and 6.63% across the five THA conditions relative to the benchmark, while increasing the overall energy utilization rate by 11.4% on average. At 100% THA, the waste heat utilization rate remains 92%-94% and the specific capture energy decreases from 3.20 to 3.06 GJ·tCO 2 −1 . The results demonstrate that the proposed staged framework enables effective substitution of high-grade extraction steam by in-plant low-grade waste heat over a wide load range, providing a practical pathway for cost-effective decarbonization retrofits of coal-fired units.

🔗 Provenance — このレコードを発見したソース

🔔 こうした論文の新着を逃したくない方は キーワードアラート に登録（無料・3キーワードまで）。

gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。 最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。