Sweden
A Multi-Zone Model for Hydrogen Accumulation and Ventilation in Enclosures
Sep 2023
Publication
Due to the small characteristic molecular size of hydrogen small leaks are more common in hydrogen systems compared to similar systems with hydrocarbons. This together with the high reactivity makes an efficient ventilation system very important in hydrogen applications. There are several models available for ventilation sizing that are based on either a well-mixed assumption or a fully stratified situation. However experiments show that man Read More
Hydrogen Embrittlement as a Conspicuous Material Challenge - Comprehensive Review and Future Directions
May 2024
Publication
Hydrogen is considered a clean and efficient energy carrier crucial for shapingthe net-zero future. Large-scale production transportation storage and use of greenhydrogen are expected to be undertaken in the coming decades. As the smallest element inthe universe however hydrogen can adsorb on diffuse into and interact with many metallicmaterials degrading their mechanical properties. This multifaceted phenomenon isgenerically categorized as hydr Read More
Zero-emission Propulsion System Featuring, Flettner Rotors, Batteries and Fuel Cells, for a Merchant Ship
Jul 2024
Publication
To meet the International Maritime Organization’s (IMO) goal of decarbonising the shipping sector by 2050 zero-emission ship propulsion systems should be developed to replace conventional fossil fuel-based ones. In this study we propose a zero-emission hybrid hydrogen-wind-powered propulsion system to be retrofitted to a benchmark merchant ship with a conventional propulsion system. The ship and its propulsion systems are modelled using an in-ho Read More
Hydrogen as Fuel in the Maritime Sector: From Production to Propulsion
Nov 2024
Publication
The maritime sector plays a crucial role in global trade yet its contribution to greenhouse gas emissions remains significant. The adoption of hydrogen as a clean energy solution is gaining traction to address this. This review paper delves into the opportunities and challenges of integrating hydrogen as a marine fuel. The entire hydrogen supply chain is investigated from production to end use highlighting advancements limitations and potential safety risks. Read More
Decarbonization of Natural Gas Systems in the EU - Costs, Barriers, and Constraints of Hydrogen Production with a Case Study in Portugal
Jul 2022
Publication
The European Union (EU) imports a large amount of natural gas and the injection of renewable hydrogen (H2) into the natural gas systems could help decarbonize the sector. The new geopolitical and energy market situation demands urgent actions in the clean energy transition and energy independence from fossil fuels. This paper aims to investigate techno-economic analysis barriers and constraints in the EU policies/frameworks that affect natura Read More
Life Cycle Assessment and Life Cycle Costing of Hydrogen Production from Biowaste and Biomass in Sweden
Jun 2023
Publication
In this study an environmental and economic assessment of hydrogen production from biowaste and biomass is performed from a life cycle perspective with a high degree of primary life cycle inventory data on materials energy and investment flows. Using SimaPro LCA software and CML-IA 2001 impact assessment method ten environmental impact categories are analyzed for environmental analysis. Economic analysis includes capital and operati Read More
Comparative Techno-Economic Analysis of Gray Hydrogen Production Costs: A Case Study
Jan 2025
Publication
Despite Iran’s considerable renewable energy (RE) potential and excellent wind capacity and high solar radiation levels these sources contribute only a small fraction of the country’s total energy production. This paper addresses the techno-economic viability of gray hydrogen production by these renewables with a particular focus on solar energy. Given the considerable potential of solar energy and the strategic location of Shahrekord it would be an optimal si Read More
Navigating the Intersection of Microgrids and Hydrogen: Evolutionary Trends, Challenges, and Future Strategies
Jan 2025
Publication
Growing interest in sustainable energy has gathered significant attention for alternative technologies with hydrogen-based solutions emerging as a crucial component in the transition to cleaner and more resilient energy systems. Following that hydrogenbased microgrids integrated with renewable energy sources including wind and solar have gained substantial attention as an upcoming pathway toward long-term energy sustainability. Hydrogen pro Read More
Strategies for Decarbonizing the Aviation Sector: Evaluating Economic Competitiveness of Green Hydrogen Value Chains - A Case Study in France
Dec 2024
Publication
Even if the aviation sector only accounts for 2% of global energy-related CO2 emissions and is the most challenging sector to decarbonize. As aviation demand grows and the need for sustainable jet fuels becomes urgent green hydrogen could substitute conventional fossil fuels thereby enabling carbon-free flights. This study investigates a techno-economic analysis of onsite versus off-site green hydrogen supply chains. A case study at the Toulouse-Bla Read More
An Efficient Renewable Hybridization Based on Hydrogen Storage for Peak Demand Reduction: A Rule-based Energy Control and Optimisation Using Machine Learning Techniques
Dec 2022
Publication
The present study proposes and thoroughly examines a novel approach for the effective hybridization of solar and wind sources based on hydrogen storage to increase grid stability and lower peak load. The parabolic trough collector vanadium chloride thermochemical cycle hydrogen storage tank alkaline fuel cells thermal energy storage and absorption chiller make up the suggested smart system. Additionally the proposed system includes a wind turbin Read More
Roadmap for the Decarbonization of Domestic Passenger Ferries in the Republic of Korea
Feb 2025
Publication
This study examines the steps to lower air emissions in South Korea’s domestic shipping sector. It highlights the significant contributions of the sector to air pollution and greenhouse gas emissions emphasizing its impact on environmental sustainability and climate change mitigation. By looking at the current shipping energy use and emissions the research identifies ways to reduce the environmental impact of domestic shipping. Data was collected fro Read More
Review of Electrofuel Feasibility - Cost and Environmental Impact
Jun 2022
Publication
Electrofuels fuels produced from electricity water and carbon or nitrogen are of interest as substitutes for fossil fuels in all energy and chemical sectors. This paper focuses on electrofuels for transportation where some can be used in existing vehicle/vessel/aircraft fleets and fueling infrastructure. The aim of this study is to review publications on electrofuels and summarize costs and environmental performance. A special case denoted as bio-electrofuels in Read More
On the Identification of Regulatory Gaps for Hydrogen as Maritime Fuel
Feb 2025
Publication
C. Georgopoulou,
C. Di Maria,
G. Di Ilio,
Viviana Cigolotti,
Mariagiovanna Minutillo,
Mosè Rossi,
B.P. Sullivan,
A. Bionda,
Markus Rautanen,
R. Ponzini,
F. Salvadore,
M. Alvarez-Cardozo,
P. Douska,
L. Koukoulopoulos,
G. Psaraftis,
G. Dimopoulos,
T. Wannemacher,
N. Baumann,
K. Mahosl,
M. Tome,
O. Noguero Torres,
F. Oikonomou,
A. Hamalainen,
F. Chillé,
Y. Papagiannopoulos and
N. Sakellaridis
The decarbonization of the maritime sector represents a priority in the energy policy agendas of the majority of Countries worldwide and the International Maritime Organization (IMO) has recently revised its strategy aiming for an ambitious zero-emissions scenario by 2050. In these regards there is a broad consensus on hydrogen as one of the most promising clean energy vectors for maritime transport and a key towards that goal. However to date a Read More
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