炭素回収を目的としたセミクローズドサイクル酸素燃焼エンジンにおける負荷・吸気圧力・当量比の影響に関する実験的解析
Experimental analysis of effects of load, intake pressure and equivalence ratio on a Semi-Closed Cycle Oxy-Fuel Combustion engine for carbon capture purposes (原題)
Diego Contreras, Vicente Bermúdez, Francisco José Arnau, José Ramón Serrano
🤖 gxceed AI 要約
日本語
商用圧縮着火エンジンを酸素燃焼（OFC）仕様に改造し、負荷・吸気圧力・λがセミクローズドサイクル（SCC）運転に与える影響を実験的に評価した研究。低負荷ではEGR率95%まで運転可能だがO2希釈が過大となる一方、中高負荷では高サイクル圧力でも適切なO2濃度が得られ効率的燃焼が可能であることを示す。吸気圧力が閉サイクル制御の鍵であり、λ制御により排気乾燥CO2濃度を負荷等の変動から切り離して一定に保てることを実証した。
English
Experimental study retrofitting a commercial compression-ignition engine to oxy-fuel combustion within a semi-closed cycle for CO2 capture. It shows the engine can run at EGR rates up to 95% at low load (though with excessive O2 dilution), while mid-high loads achieve suitable O2 concentrations for efficient combustion even at high cycle pressures. Intake pressure is identified as the key control variable, and dry exhaust CO2 concentration can be held constant via λ control, isolating it from load and water-injection variation.
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
CO2回収型燃焼技術は日本のGX実現に向けたCCUS・水素・アンモニア等の脱炭素電源ポートフォリオの一部として位置づけられ、特に分散型・産業用熱源の脱炭素化に関わる。ただし本論文は機関レベルの実験であり、SSBJ開示や政策制度との直接的な接続は薄い。
In the global GX context
Adds experimental evidence to the CCUS/decarbonization technology space relevant to hard-to-abate transport and industrial heat, which underpins transition-plan credibility under TCFD/ISSB. Its value to global disclosure scholarship is indirect—techno-economic feasibility evidence rather than disclosure practice.
👥 読者別の含意
🔬研究者:OFC圧縮着火エンジンにおける吸気圧力とλ制御がCO2濃度安定化と燃焼効率に与える実験的知見を提供する。
🏢実務担当者:回収型燃焼機関の運転制御変数（吸気圧力・λ）と水分注入が燃焼効率に与える制約を理解する材料になる。
🏛政策担当者:CCUS技術の実装可能性評価において、エンジンレベルのCO2回収性能と運転制約を把握する参考になる。
📄 Abstract（原文）
In this paper, an experimental evaluation was conducted to determine the effect of engine load, intake pressure, and the O2-to-fuel ratio (λ) on a Semi-Closed Cycle Oxy-Fuel Combustion (SCC-OFC) reciprocating internal combustion engine (RICE). To this end, tests were carried out at low and mid-high loads in a commercial compression ignition (CI) RICE retrofitted to OFC, sweeping intake pressure and λ at a constant temperature while employing water injection for evaporative cooling. On the one hand, it has been demonstrated that the CI engine can operate across a very wide range of EGR rates—up to 95% at low loads—although with excessive O2 dilution, as inherently high cycle pressure means high EGR and high trapped mass. On the other hand, at mid-high loads, suitable O2 concentrations are achieved even at high cycle pressures, thereby enabling efficient combustion. The cycle operating intake pressure is identified as a key variable in the optimization and control of closed-cycle RICEs. Furthermore, it was shown that the exhaust dry CO2 concentration can be isolated from variations in load, water injection, or EGR, maintaining a constant level through the control of λinj. A critical correlation was observed between the quantity of liquid water ingested by the engine and the deterioration of combustion efficiency (an increase in CO and uHC emissions), presenting a fundamental challenge for closed cycles operating with high wet EGR rates. The extended ignition delay caused by OFC CI - RICE offers a promising avenue for the adoption of highly reactive fuels, such as high-cetane biodiesel, paving the way for the integration of biofuels with source CO2 capture directly from the highly concentrated flue gas of SCC-OFC RICEs.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.enconman.2026.122333first seen 2026-11-06 04:53:32
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