32 hasil untuk "Richard Hanke-Rauschenbach"
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Artikel Jurnal Teks lengkap
Model-Based Analysis of Low Stoichiometry Operation in Proton Exchange Membrane Water Electrolysis
Proton exchange membrane water electrolysis cells are typically operated with high water flow rates in order to guarantee the feed supply for the reaction, the hydration of the ionomer phase and to homogenize the temperature distribution. However, the influence of low flow rates on the cell…
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Large-scale performance evaluation of energy management strategies for hybrid energy storage systems with a focus on system sizing
This study presents a quantitative performance evaluation of energy management strategies (EMS) for hybrid energy storage systems (HESS) with a focus on system sizing. It addresses the lack of systematic and comparable studies across EMS types.A technology-agnostic linear storage model is employed…
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The effect of efficiency and self-discharge parameterization on the sizing of hybrid energy storage systems
Abstract A hybrid energy storage system (HESS) is a widely investigated setup as a means to reduce losses and system dimensions by combining storage technologies with complementary characteristics. However, reported benefits are often based on case studies and do not clearly distinguish systemic…
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Potential of Hydrogen Fuel Cell Aircraft for Commercial Applications with Advanced Airframe and Propulsion Technologies
The present work demonstrates a comparative study of hydrogen fuel cells and combustion aircraft to investigate the potential of fuel cells as a visionary propulsion system for radically more sustainable medium- to long-range commercial aircraft. The study, which considered future airframe and…
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Potentials and limitations of battery-electric container ship propulsion systems
The defossilization of the open-sea ship traffic can most definitely only be achieved with alternative energy carriers. Besides synthetic fuels, battery-electric propulsion is a much-discussed measure, especially for smaller vessels and short passages. However, there is no consensus on quantitative…
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Artikel Jurnal Teks lengkap
Is iridium demand a potential bottleneck in the realization of large-scale PEM water electrolysis?
Proton exchange membrane water electrolysis (PEMWE) is a key technology for future sustainable energy systems. Proton exchange membrane (PEM) electrolysis cells use iridium, one of the scarcest elements on earth, as catalyst for the oxygen evolution reaction. In the present study, the expected…
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ESTSS—energy system time series suite: a declustered, application-independent, semi-artificial load profile benchmark set
Abstract This paper introduces an univariate application-independent set of load profiles or time series derived from real-world energy system data. The generation involved a two-step process: manifolding the initial dataset through signal processors to increase diversity and heterogeneity…
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Electrochemical Performance of a Spatially Distributed ECPrOx Reactor
In this contribution a spatially distributed Electrochemical Preferential Oxidation (ECPrOx) reactor is evaluated and the influence of the temperature, CO inlet concentration, feed flow rate and relative humidity on the polarization curve, the local current distribution and the CO outlet…
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Artikel Jurnal Teks lengkap
Analysis and Design of Fuel Cell Systems for Aviation
In this paper, the design of fuel cells for the main energy supply of passenger transportation aircraft is discussed. Using a physical model of a fuel cell, general design considerations are derived. Considering different possible design objectives, the trade-off between power density and…
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Hybrid electrolyzer systems: Smart strategy or economic fallacy?
Hybrid electrolyzer systems combining alkaline water electrolysis and proton exchange membrane water electrolysis have been investigated based on the expectation that their contrary techno-economic characteristics may compensate for the individual limitations of each technology. Such a combination…
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Dispatch of decentralized energy systems using artificial neural networks: A comparative analysis with emphasis on training methods
Due to the availability of flexibility, Decentralized Energy Systems (DES) play a central role in integrating renewable energies. To efficiently utilize renewable energy, dispatchable components must be operated to bridge the time gap between inflexible supply and energy demand. Due to the large…
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Artikel Jurnal Teks lengkap
Hydrogen-powered aviation and its reliance on green hydrogen infrastructure – Review and research gaps
Aircraft powered by green hydrogen (H2) are a lever for the aviation sector to reduce the climate impact. Previous research already focused on evaluations of H2 aircraft technology, but analyses on infrastructure related cost factors are rarely undertaken. Therefore, this paper aims to provide a…
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Anode catalyst layer optimization in polymer electrolyte membrane water electrolysis: Modeling catalyst layer properties and interface effects
The design of the anode catalyst layer (ACL) and its interface to the porous transport layer (PTL) significantly influence cell behavior of proton exchange membrane water electrolysis (PEMWE). To understand the complex interaction between the two layers and its interface on cell performance…
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Structured Analysis and Review of Filter-Based Control Strategies for Hybrid Energy Storage Systems
Hybrid energy storage systems (HESS), i.e., the combination of two different energy storage technologies, are widely discussed as a promising solution for energy storage problems. A common control scheme to allocate the power between these storages and the subject of this study is filter-based…
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Cost-optimized replacement strategies for water electrolysis systems affected by degradation
A key factor in reducing the cost of green hydrogen production projects using water electrolysis systems is to minimize the degradation of the electrolyzer stacks, as this impacts the lifetime of the stacks and therefore the frequency of their replacement. To create a better understanding of the…
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Predicting future polarization curves from operating data: Machine learning-based investigation of degradation modeling concepts for PEM water electrolysis
Electrolysis is expected to play an essential role in future energy systems that rely on renewable energy sources, especially in achieving climate neutrality in sectors that are challenging to electrify directly. The economic success of this technology is largely dependent on effective predictive…
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Artikel Jurnal Teks lengkap
Modelling and Designing Cryogenic Hydrogen Tanks for Future Aircraft Applications
In the near future, the challenges to reduce the economic and social dependency on fossil fuels must be faced increasingly. A sustainable and efficient energy supply based on renewable energies enables large-scale applications of electro-fuels for, e.g., the transport sector. The high gravimetric…
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District heating supply via large-scale heat pumps using wastewater treatment plant effluent and electrolysis waste heat: A techno-economic analysis of potential synergies
Space heating and domestic hot water account for roughly one third of final energy consumption in Europe, with largely fossil-based district heating supply providing around 11.7% of buildings-related heat demand. Achieving climate-neutral district heating therefore requires a transition toward…
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A comparative analysis of low-CO2 steam generation technologies
Considering Europe’s imperative to reduce CO2 emissions under the Paris Climate Agreement, there is an urgent need to transition to low-CO2 steam generation in industrial processes. Since steam generation is a major contributor to carbon emissions. This paper presents a comparative analysis across…
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Artikel Jurnal Teks lengkap
Preliminary Design of Regional Aircraft—Integration of a Fuel Cell-Electric Energy Network in SUAVE
To enable climate-neutral aviation, improving the energy efficiency of aircraft is essential. The research project Synergies of Highly Integrated Transport Aircraft investigates cross-disciplinary synergies in aircraft and propulsion technologies to achieve energy savings. This study examines a…