Application of Levelized and Environmental Cost Accounting Techniques to Demonstrate the Feasibility of Green Hydrogen-Powered Buses in Brazil

Hydrogen, Год журнала: 2025, Номер 6(1), С. 10 - 10

Опубликована: Фев. 21, 2025

Background: This study applied levelized cost of hydrogen (LCOH) and environmental accounting techniques to evaluate the feasibility producing green (GH2) via alkaline electrolysis for use in a bus fleet Fortaleza, Brazil. Methods: A GH2 plant with 3 MW wind tower was considered this financial project. sensitivity analysis conducted assess economic viability project, considering influence production volume, number kits, financing time, other kay indices. Revenue derived from sale by-products, including hospital oxygen (GHO2) excess energy. life cycle assessment (LCA) performed quantify material emission flows throughout H2 chain. zero-net price scenario tested its urban transportation. Results: The Brazil using powered by energy proved be economically viable fueling hydrogen-powered fleet. For volumes ranging 8.89 88.9 kg H2/h, revealed high performance, achieving net present value (NPV) between USD 19.4 million 21.8 million, payback period 1–4 years, an internal rate return (IRR) 24–90%, on investment (ROI) 300–1400%. LCOH decreased increased production, 56 25 USD/MWh. Over project timeline, reduced CO2 emissions 53,000–287,000 t eq. fuel cell demonstrated through savings revenue carbon credit sales, highlighting economic, social, sustainability transportation

Язык: Английский

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Tribological assessment of lubricants used in hydrogen assisted diesel engines

Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology, Год журнала: 2025, Номер unknown

Опубликована: Март 20, 2025

This study investigates the tribological performance of lubricants used in hydrogen-assisted diesel engines with specific focus on their rheology, additives and formation tribo-films. While there are concerns about reduced lubricant viscosity increased wear due to hydrogen combustion, impact quality tribology Internal Combustion Engines (ICEs) is a less-explored topic. As an initial step, this provides in-depth analysis engines, both without assistance. The includes chemical evaluations, controlled tribometric from refuse trucks after operation interval equivalent 2000 km. results show marginal changes rheology use hydrogen, but differences frictional behaviour under mixed boundary lubrication regimes. In addition, X-ray Photoelectron Spectroscopy (XPS) shows variations anti-wear additive adsorption surfaces, noticeable difference between fresh oil samples, aligning data. Despite measured friction regimes lubrication, XPS only content associated tribofilms. demonstrates that rheological states affect interaction surfaces lubrication. Understanding these crucial for future development suitable formulations dual-fuel ICEs.

Язык: Английский

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Projecting carbon capture and electricity share in LNG lifecycle: GHG economics via regression and stochastic analysis

Energy, Год журнала: 2025, Номер 327, С. 136358 - 136358

Опубликована: Май 7, 2025

Язык: Английский

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A net-zero carbon emission multi-generation system for green ammonia production: Comprehensive analysis and ANN-assisted optimization using moth flame optimizer

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 137, С. 303 - 322

Опубликована: Май 13, 2025

Язык: Английский

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An assessment of newly developed urea fuel cell electrodes

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 164536 - 164536

Опубликована: Июнь 1, 2025

Язык: Английский

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