ギニア湾におけるカーボンニュートラル船舶のための有機ランキンサイクル改修の経済性能分析
Economic Performance Analysis of Organic Rankine Cycle Retrofit for Carbon Neutral Shipping in the Gulf of Guinea (原題)
Victor Odokowo, Robert Poku, Oyinkepreye Lucky Bebeteidoh, Ezenwa Ogbonnaya
🤖 gxceed AI 要約
日本語
本研究は、ギニア湾を航行するタンカー船に有機ランキンサイクル（ORC）をレトロフィット導入した場合の経済性を、熱力学・質量・エネルギー収支と経済指標を統合して評価した。結果、ORC改修は廃熱を電力に変換し、運航・経済性能を向上させる。CAPEX 20〜60%で魅力的であり、金利8%未満でNPVが強く正、燃料価格上昇はIRRに好影響で投資回収期間は4年未満となる。稼働時間が基準の60%未満ではNPVが負になるが、60%以上で正となる。船舶の廃熱特性に適合したORC選定と経済指標の適切な組み合わせが重要と結論。
English
This study evaluates the economic viability of retrofitting a marine diesel engine with an Organic Rankine Cycle (ORC) for a tanker in the Gulf of Guinea, integrating thermodynamics and economic indices. Results show ORC retrofit enhances operational and economic performance by converting waste heat to power, with attractive returns at CAPEX 20-60%, positive NPV at interest rates below 8%, and payback under 4 years with fuel price increases. However, NPV turns negative below 60% base running hours, indicating viability thresholds. Proper ORC selection and economic indicator blending are crucial for carbon-neutral shipping.
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
日本の海運業界は国際海運のGHG削減目標に対応するため、省エネ技術の導入が急務である。本研究成果は、ORC改修の経済性評価手法を提供し、日本企業が船舶のエネルギー効率改善投資を検討する際の参考となる。特に、SSBJやTCFD開示におけるScope 1排出削減策として位置付けることが可能。
In the global GX context
This study contributes to global shipping decarbonization by providing an economic assessment framework for ORC retrofits, relevant to IMO GHG reduction targets. It offers insights for shipowners and policymakers on cost-effective waste heat recovery, aligning with broader energy efficiency and carbon neutrality goals. The methodology can be adapted to other regions and vessel types, supporting transition finance decisions.
👥 読者別の含意
🔬研究者:Provides a comprehensive economic model for ORC retrofit in shipping, useful for further research on waste heat recovery and decarbonization pathways.
🏢実務担当者:Offers practical guidance on evaluating ORC retrofit investments, including CAPEX, NPV, and payback thresholds, for shipping companies seeking energy efficiency.
🏛政策担当者:Highlights the economic conditions under which ORC retrofits are viable, informing policies that support shipping decarbonization through financial incentives.
📄 Abstract（原文）
This study presents a detailed economic assessment tailored for retrofitting marine diesel engine (MDE) with Organic Rankine Cycle (ORC) towards attaining energy efficiency and carbon neutrality in shipping. Addressing a vital gap in current research, the study, adeptly synchronizes thermodynamics, mass and energy balance equations coupled with economic indices to assess the viability of ORC retrofit technology onboard a tanker vessel on voyage in the Gulf of Guinea (GoG). To define a roadmap to the adoption of ORC onboard towards economic, energy and emission efficiency, the simulation and analysis were brought to fruition applying MATLAB. The results obtained establish that employing ORC retrofit significantly boosts the overall ship operational and economic performances by converting Waste Heat (WH) into power. Results showed that ORC retrofit remains attractive in the case study ship, with a Capital Expenditure (CAPEX) range of 20 to 60%, providing a lower Levelized Cost of Electricity (LCOE) and maximum Net Present Value (NPV). An interest rate of less than 8 % produces a strongly positive NPV and a LCOE of ₦80 per kWh. A rise in fuel price to about 0.9% cost/kg has a positive effect on the IRR and a reduction in the DPBT below 4 years. Analysis revealed that below 60% of base running hours, the NPV may turn negative causing the ORC retrofit investment unbeneficial and unviable. Above 60% of base running hours, the NPV rises, signaling the ranges of viability of the ORC retrofit especially in the GOG. The study also highlights the importance of adopting a well-matched ORC unit based on a vessel’s peculiarity of WH. Also, a proper blend of economic indicators is imperative to achieve an economically viable retrofitted system for enhanced operational and energy efficiency for a carbon neutral shipping.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.11648/j.ajset.20261103.13first seen 2026-08-25 04:33:49
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