Applications & Pathways
Design and Optimization of a Solely Renewable Based Hybrid Energy System for Residential Electrical Load and Fuel Cell Electric Vehicle
Sep 2020
Publication
Due to increasing energy demand limited fossil fuels and increasing greenhouse gasses people is in need for alternative energy sources to have a sustainable world. The objective of this study is to look for alternative solutions and design a hybrid energy system to meet any energy needs of a single family house including both utility and transportation. The system is designed and optimized using HOMER software. According to the optimization studies leveli Read More
Ammonia as Hydrogen Carrier for Realizing Distributed On-site Refueling Stations Implementing PEMFC Technology
Oct 2020
Publication
Ammonia is a particularly promising hydrogen carrier due to its relatively low cost high energy density its liquid storage and to its production from renewable sources. Thus in recent years great attention is devoted to this fuel for realizing next generation refueling stations according to a carbon-free energy economy. In this paper a distributed onsite refueling station (200 kg/day of hydrogen filling 700-bar HFCEVs (Hybrid Fuel Cell Electric Vehicles) with Read More
A Review of LCA Studies on Marine Alternative Fuels: Fuels, Methodology, Case Studies, and Recommendations
Jan 2025
Publication
Life Cycle Assessment (LCA) methodology can be used to quantitatively assess the greenhouse gas emissions of low- or zero-carbon marine alternative fuels throughout their life cycle (from well to wake) and is an important basis for ensuring a green energy transition in the shipping industry. This paper first clarifies the trends and requirements of low-carbon development in shipping and introduces the major ship emission reduction technologies and e Read More
Heat Transfer Modeling of Hydrogen-Fueled Spark Ignition Engine
Jan 2025
Publication
Currently green hydrogen generated through renewable energy sources stands out as one of the best substitutes for fossil fuels in mitigating pollutant emissions and consequent global warming. Particularly the utilization of hydrogen in spark ignition engines has undergone extensive study in recent years. Many aspects have been analyzed: the conversion of gasoline engines to hydrogen operation the combustion duration the heat transfer and in ge Read More
Conceptual Design and Aerostructural Trade-Offs in HydrogenPowered Strut-Braced Wing Aircraft: Insights into Dry and Wet Ultra-High Aspect Ratio Wings
Jan 2025
Publication
Stringent sustainability goals are set for the next generation of aircraft. A promising novel airframe concept is the ultra-high aspect ratio Strut-Braced Wing (SBW) aircraft. Hydrogen-based concepts are active contenders for sustainable propulsion. The study compares a medium-range Liquid Hydrogen (LH2) to a kerosene-based SBW aircraft designed with the same top-level requirements. For both concepts overall design operating costs and emissions are Read More
Comparative Assessment of Hydrogen and Methanol-Derived Fuel Co-Combustion for Improved Natural Gas Boiler Performance and Sustainability
Jan 2025
Publication
Faced with a global consensus on net-zero emissions the use of clean fuels to entirely or substantially replace traditional fuels has emerged as the industry’s primary development direction. Alcohol–hydrogen fuels primarily based on methanol are a renewable and sustainable energy source. This research focuses on energy sustainability and presents a boiler fuel blending system that uses methanol–hydrogen combinations. This system uses the boiler’s wast Read More
Performance and Emissions Characteristics of Hydrogen-diesel Dual-fuel Combustion for Heavy-duty Engines
Jan 2025
Publication
This study investigates hydrogen-diesel dual-fuelling specifically for a modern 4.4L 4-cylinder heavy-duty diesel engine using extensive one-dimensional combustion modelling in Ricardo WAVE. Parametric analyses from 900 to 2200 rpm speeds and 0 to 17.5% hydrogen fractions introduced via port injection are undertaken to assess the effect of exhaust gas recirculation (EGR) for controlling NOx. Moreover impacts on key indicators like brake power to Read More
Two-stage Operation Optimization Strategy of Park Integrated Energy System Cluster Coupled with Hydrogen Energy Storage
Jan 2025
Publication
In response to the issues of insufficient flexibility in the operation of hydrogen storage and hydrogen production equipment with poor economic viability when operated independently in the park firstly a comprehensive energy system model for hydrogen storage and power generation which considering the multi-operational conditions of alkaline electrolyzers (ELE) is constructed. This model is integrated into the comprehensive en ergy system of the park a Read More
Energy Management and Sizing of a Stand-alone Hybrid Renewable Energy System for Community Electricity, Fresh Water, and Cooking Gas Demands of a Remote Island
Nov 2023
Publication
Research into the off-grid hybrid energy system to provide reliable electricity to a remote community has extensively been done. However simultaneous meeting electric freshwater and gas demands from the off-grid hybrid energy sources are very scarce in literature. Power- to-X (PtX) is gaining attention in recent days in the energy transition scenarios to generate green hydrogen the primary product of the process as an energy carrier which is deem Read More
Decarbonization of Long-Haul Heavy-Duty Truck Transport: Technologies, Life Cycle Emissions, and Costs
Feb 2025
Publication
Decarbonizing long-haul heavy-duty transport in Europe focuses on batteryelectric trucks with high-power chargers or electric road systems and fuel-cell-electric vehicles with hydrogen refueling stations. We present a comparative life cycle assessment and total cost of ownership analysis of these technologies for 20% of Germany’s heavy-duty long-haul transport alongside internal combustion engine vehicles. The results show that fuel cell vehicles with o Read More
Techno-economic Comparative Study of Grid-connected PV/Reformer/FC Hybrid Systems with Distinct Solar Tracking Systems
Feb 2023
Publication
The purpose of this study is to analyze and compare the techno-economic performance of grid-connected Hybrid Energy Systems (HES) consisting of Photovoltaic (PV) and Reformer Fuel-Cell (RF-FC) using different types of solar PV tracking techniques to supply electricity to a small location in the City of Chlef Algeria. The PV tracking systems considered in this study include fixed facing south at four different angles (32◦ 34◦ 36◦ 38◦) horizontal-axis Read More
Low-carbon Economic Dispatch of Integrated Energy system with Carbon Capture Power Plant and Multiple Utilization of Hydrogen Energy
Jan 2025
Publication
In the context of “dual carbon” in order to promote the consumption of renewable energy and improve energy utilization efficiency a low-carbon economic dispatch model of an integrated energy system containing carbon capture power plants and multiple utilization of hydrogen energy is proposed. First introduce liquid storage tanks to transform traditional carbon capture power plants and at the same time build a multi-functional hydrogen utilizati Read More
Wind-powered Hydrogen Refueling Station with Energy Recovery for Green Mobility in Sustainable Cities
Jan 2025
Publication
This study presents the conceptual design and evaluation of an HRS for light-duty FCEVs. The proposed system integrates wind turbines a water electrolyzer three-stage hydrogen compressor heat recovery and storage a two-stage Organic Rankine Cycle (TS-ORC) hydrogen storage tanks a Vapor Compression Refrigeration Cycle (VCRC) and a hydrogen dispenser. Waste heat from the hydrogen compression process is harnessed to power the TS-ORC whe Read More
Effect of Hydrogen Addition on Combustion and Thermal Characteristics of Impinging Non-premixed Jet Flames for Various Heating Value Gases
Jun 2023
Publication
This study experimentally investigates the effect of hydrogen addition on combustion and thermal characteristics of impinging non-premixed jet flames for low-heating values gases (LHVGs). We evaluate the flame morphology and stability using a concentric non-premixed combustor with an impingement plate. OH radicals are visualized using the OH* chemiluminescence and OH-planar laser-induced fluorescence (OH-PLIF) system. Emission characteristics Read More
Comparative Analysis of the Alternative Energy: Case of Reducing GHG Emissions of Estonian Pilot Fleet
Feb 2025
Publication
The FuelEU Maritime Regulation part of the European Union’s (EU’s) Fit for 55 initiative aims to achieve significant reductions in greenhouse gas (GHG) emissions within the maritime sector. This study assesses the feasibility of alternative fuels for the Estonian pilot fleet using a Well-to-Wake (WtW) life cycle assessment (LCA) methodology. Operational data from 18 vessels sourced from the Estonian State Fleet’s records were analyzed including technic Read More
Decarbonizing Insular Energy Systems: A Literature Review of Practical Strategies for Replacing Fossil Fuels with Renewable Energy Sources
Feb 2025
Publication
The reliance on fossil fuels for electricity production in insular regions creates critical environmental economic and logistical challenges particularly for ecologically fragile islands. Transitioning to renewable energy is essential to mitigate these impacts enhance energy security and preserve unique ecosystems. This systematic review addresses key research questions: what practical strategies have proven effective in reducing fossil fuel depe Read More
Emerging Perovskite-based Catalysts for Sustainable and Green Ammonia Production: A Promosing Hydrogen Energy Carrier
Feb 2025
Publication
Ammonia (NH₃) presents a comprehensive energy storage solution for future energy demands. Its synthesis plays a pivotal role in the chemical industry acting as a fundamental precursor for fertilizers explosives and a wide range of industrial applications. In recent years there has been a growing interest in exploring novel catalyst materials to enhance the efficiency selectivity and sustainability of NH3 production technologies. Among these materials p Read More
Energy Scheduling of Hydrogen Hybrid UAV Based on Model Predictive Control and Deep Deterministic Policy Gradient Algorithm
Feb 2025
Publication
Energy scheduling for hybrid unmanned aerial vehicles (UAVs) is of critical importance to their safe and stable operation. However traditional approaches predominantly rule-based often lack the dynamic adaptability and stability necessary to address the complexities of changing operational environments. To overcome these limitations this paper proposes a novel energy scheduling framework that integrates the Model Predictive Control (MPC) with a De Read More
Integrating Sustainability in Aircraft Component Design: Towards a Transition from Eco-Driven to Sustainability-Driven Design
Feb 2025
Publication
Eco-design is an innovative design methodology that focuses on minimizing the environmental footprint of industries including aviation right from the conceptual and development stages. However rising industrial demand calls for a more comprehensive strategy wherein beyond environmental considerations competitiveness becomes a critical factor supported by additional pillars of sustainability such as economic viability circularity and Read More
Feasible Route Towards Decarbonising Marine Transport with Flexible, Hydrogen-enriched, Reactivity Controll Compression Ignition Mid-speed Engines
Feb 2025
Publication
Hydrogen (H2) admixing in Reactivity Controlled Compression Ignition (RCCI) technology engines is touted to enhance indicated efficiency (ITE>50%) optimize combustion and reduce greenhouse gas emissions. However many pending issues remain regarding engine durability nitrogen oxide (NOX) emissions and blending limits. These issues are addressed by employing a novel performance-oriented model which simulates under 3 min combustion physics w Read More
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