A5070460109- Fuel Cells and Related Materials
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Advanced Combustion Engine Technologies
- Hybrid Renewable Energy Systems
- Particle physics theoretical and experimental studies
- Electric and Hybrid Vehicle Technologies
- Advanced Battery Technologies Research
- Electric Vehicles and Infrastructure
- Combustion and flame dynamics
- Electrocatalysts for Energy Conversion
- Hydrogen Storage and Materials
- Advancements in Solid Oxide Fuel Cells
- Physics and Engineering Research Articles
- Vehicle emissions and performance
- Engine and Fuel Emissions
- Spacecraft and Cryogenic Technologies
- Refrigeration and Air Conditioning Technologies
- Integrated Energy Systems Optimization
- Mechanical Failure Analysis and Simulation
- Fluid Dynamics and Heat Transfer
- Membrane-based Ion Separation Techniques
- Advanced battery technologies research
- Catalytic Processes in Materials Science
- Electrochemical Analysis and Applications
Graz University of Technology
2012-2024
Society for Chemical Engineering and Biotechnology
2024
Combustion Institute
2010-2014
Massachusetts Institute of Technology
2009
University of California, Berkeley
2002-2009
Based on technical, environmental, economic and social facts recent findings, the feasibility of transition from our current fossil age to new green is analyzed in detail at both global local level. To avert threats health problems, environmental pollution climate change quality standard life, a twofold radical paradigm shift outlined: Green Energy Revolution means complete fossil-based primary energy sources such as sun, wind, water, heat, biomass; Hydrogen Society final electricity...
This paper focuses on the main chemical, electrochemical, and mechanical degradation mechanisms poisoning effects that influence life-time, performance, functionality of PEM (polymer electrolyte membrane) fuel cell stack components reversibly irreversibly. The underlying causes are explained, possible influencing factors listed, operation state health described. Based this, further consequences as well mitigation strategies presented. summary gives an overview affected voltage decay,...
The transport of hydrogen in used natural gas pipelines is a strategic key element pan-European infrastructure. At the same time, accurate knowledge quality essential order to be able address wide application range. Therefore, an experimental investigation was carried out find which contaminants enter into from pipelines. Pipeline elements high pressure grid Austria were exposed hydrogen. Steel built between 1960 and 2018, operated with odorised pure gas, examined. analysed according...
In recent years, alkaline exchange membrane water electrolysis (AEM-WE) has attracted a lot of attention for its potential cost reduction compared to traditional systems. Despite this promise, challenges related efficiency and stability must be effectively addressed fully realise the AEM-WE. This paper presents comprehensive investigation an AEM-WE single-cell including electrochemical impedance spectroscopy (EIS) in conjunction with equivalent circuit model (ECM). For first time...
The anode subsystem of PEM fuel cells has to supply hydrogen in the required temperature, pressure, mass flow and concentration range under all operating conditions. At present, several components such as valves, sensors a recirculation pump/blower (active recirculation) secure supply, which consumes significant amount energy reduces overall efficiency. Passive with pulsed injector-ejector unit is promising approach guarantee while maintaining low consumption. However, high development...
In order to industrialize proton exchange membrane (PEM) fuel cells and balance of plant components, simulations are utilized minimize costs during development maximize performance. A key component in the anode path is ejector, which often optimized by 2D CFD entrainment ratio. However, most turbulence models for do not accurately predict ejector's ratio across entire operating range. This study involves validating various using experimental data from two distinct ejectors. The optimal...
Abstract A simulation tool called HYDRA to optimize individual hydrogen infrastructure layouts is presented. The different electrolyzer technologies, namely proton exchange membrane electrolysis, anion alkaline and solid oxide as well storage possibilities are described in more detail evaluated. To illustrate the application opportunities of HYDRA, three project examples discussed. include central decentral applications while taking usage into account.
A transition towards zero-emission fuels is required in the mobility sector order to reach climate goals. Here (green) renewable hydrogen for use fuel cells will play an important role, especially heavy duty applications such as trucks. However, there are still challenges overcome regarding efficient storage, infrastructure integration and optimization of refuelling process. key aspect reduce duration much possible, while staying below maximum allowed temperature 85 °C. Experimental tests a...
Hydrogen plays a vital role in decarbonizing the mobility sector. With number of hydrogen vehicles expected to drastically increase, network refuelling stations needs be built keep up with demand. However, further research and development on infrastructure, storage standardization is required overcome technical economic barriers. Simulation tools can reduce time costs during design phase, but existing models do not fully support calculations complete arbitrary system layouts. Therefore,...
Abstract Within the Recycalyse project different research organization and industrial partners worked together to develop catalysts for oxygen evolution reaction proton exchange membrane electrolysis that reduce use of critical raw materials. The are applied polymer electrolyte membranes via a direct coating process tested both in single cells at stack level. In order dependence on material imports Europe long term, recycling is considered catalysts, electrodes entire system.
Hydrogen plays a pivotal role in transitioning to CO2-free energy systems, yet challenges regarding costs and sourcing persist supplying Europe with renewable hydrogen. Our paper proposes simulation-based approach determine cost-optimal combinations of electrolyser power peak for off-grid hydrogen production, considering location source dependencies. Key findings include easy estimation Levelized Costs (LCOH) optimal plant sizing based on the regional yield source. Regional investment risks...
Hydrogen is an important energy carrier for a future without fossil fuels, but PEM fuel cell systems have to utilize the entire available as efficiently possible. typically stored at maximum pressure of up 700 bar and supplied anode system about 15 bar. Normally, reduction valve expands hydrogen between bar, unused during expansion. In this paper, different expansion machines are analyzed most attractive concepts studied in detail regain energy. Finally, piston concept designed with...
E896 has measured Lambda production in 11.6A GeV/c Au-Au collisions over virtually the whole rapidity phase space. The midrapidity p(t) distributions have been for first time at this energy and appear to indicate that hyperons different freeze-out conditions than protons. A comparison with relativistic quantum molecular dynamics model shows while there is good shape agreement high predicts significantly slopes of m(t) spectra midrapidity. data, where overlap occurs, are consistent previously...
Hydrogen is a key enabler of sustainable society. Refurbishment the existing natural gas infrastructure for up to 100% H2 considered one most energy- and resource-efficient energy transportation methods. The question remains whether with reasonable adaptions comparable amounts possible. well-known critical components refurbishment, such as increased compressor power, reduced linepack well pipeline transport efficiencies, their influencing factors were based on thermodynamic calculations...
Green hydrogen presents a promising solution for transitioning from fossil fuels to clean energy future, particularly with the application of fuel cell electric vehicles (FCEVs). However, refuelling process FCEVs requires extensive pre-cooling achieve fast filling times. This study experiments and simulations station equipped an adaptable cold-fill unit, aiming maximize fuelling efficiencies. For this purpose, we developed experimentally validated simulation models tank aluminium block heat...
The energy transition from fossil-based sources to renewable of an industrialized country is a big challenge and needs major systemic changes the supply. Such require holistic view system, which includes both potentials consumption. Thereby exergy, describes quality energy, must also be considered. In this work, determination analysis such are presented, using Austria as example. methodology enables calculation spatially resolved current exergy consumption, useful demand technical potential...
Our energy system is facing major challenges in the course of unavoidable shift from fossil fuels to fluctuating renewable sources. Regional hydrogen production by electrolysis, utilizing regional available excess energy, can support expansion converting surplus into and supplying it end sectors as a secondary carrier or process media. We developed methodology which allows identification optimal electrolysis scaling, achievable Levelized Costs Hydrogen (LCOH) well annually producible amount...