PUBLICATIONS

In the context of tightening climate policies, industrial clusters and large metallurgical enterprises must revise their carbon emissions targets and develop transition strategies toward carbon neutrality. This study demon- strates that reducing the carbon footprint associated with electricity production and consumption in the in- dustrial sector can be feasible utilizing the real-time car- bon intensity monitoring of on-site power plants, avail- able distributed renewables, and green electricit...

The transition in cities toward environmental sustainability requires transforming urban subsystems such as energy, transport, and waste infrastructure. Based on the frameworks of strategic spatial planning (SSP) and urban transition management (UTM), the urban transition is conceptualized as a long‐term process in which stakeholders co‐create a vision and a strategic plan, which is subsequently implemented in multiple relatively short‐term projects transforming these urban subsystems. While co‐...

Urban planning for renewable energies requires dynamic simulations to visualize complex spatial data to support stakeholders’ decision-making process. Tangible User Interfaces (TUIs) support interactions with complex data and provide a physical exploration ground. We designed a prototype for urban planning, integrating tangible windmills reacting in real-time to wind simulation. We conducted a within-subjects study (n=16), testing a tangible prototype against a graphical version. We measured per...

Changes of the laminar-turbulent flow transition due to unsteady wind conditions influence the efficiency of wind turbines. In order to clarify the feasibility of monitoring these changes by means of thermographic flow visualization, a coupled thermal-flow simulation is performed indicating a feasible temporal resolu-tion down to 50 ms, i.e. well below one rotor revolution. Further, a co-rotating measurement platform is presented that enables the continuous image acquisition of a rotor blade sec...

Abstract Analyzing the airflow around wind turbines during operation requires an in-process-capable measurement approach that functions without modification of the rotor blade. Infrared–thermographic flow visualization is such a measurement approach. However, its measurement capabilities on wind turbines in operation are highly weather-dependent. Therefore, to understand the expected flow visualization quality in non-laboratory conditions, the dependence of the achievable contrast...

In power system engineering the concept of resilience has critical importance because a resiliently designed system can save lives, reduce costs, and mitigate the overall negative impact of shocks. This paper addresses the quantification of resilience through a holistic approach that includes both the network topology and properties that contribute to strengthening resilience and flexibility or reducing vulnerability. A metric for resilience quantification has been developed, encompassing system...

To meet greenhouse gas neutrality goals by 2050, the demand for green hydrogen from water electrolysis is rising. Proton exchange membrane water electrolysis (PEMWE) offers high efficiency and operational flexibility for producing green hydrogen. However, the increasing number of PEMWE plants highlights the need for effective prognostic and health management (PHM) to ensure safety, extended lifetimes and reduction of operational costs. This publication addresses this need by first conducting a s...

Network creation games are well-established for investigating the decentralized formation of communication networks, like the Internet or social networks. In these games, selfish agents that correspond to network nodes strategically create costly edges to maximize their centrality in the formed network. We depart from this by focusing on the simpler objective of maximizing the 2-neighborhood. This seems natural for social networks, as an agent’s connection benefit is typically provided by her ne...

This paper investigates the investment behaviors of industrial prosumers in battery storage technologies, analyzing the influence of Social, Technological, Economic, Environmental, and Political factors from 2021 to 2030. The focus is on modeling how these factors affect the adoption of sodium-based and lithium iron phosphate battery technologies among European manufacturers. Employing the diffusion of innovations theory, we categorize industrial prosumers to predict their investment decisions i...

Green hydrogen, produced mainly by electrolysis, is a promising energy carrier to de-fossilise different economy sectors, from heavy industry to logistics. A fully transformed economy would use hydrogen as a process gas and a fuel for heat generation and vehicles. However, since the technology to produce green hydrogen has yet to be available at an industrial scale, there are no projections for forming regional hydrogen hubs. This article contributes to synthesising a holistic framework to speci...

Abstract Infrared thermography (IRT) can be used to visualize the boundary layer flow on wind turbines – during operation and with no need of blade or turbine modification. So far, no other technique is capable of this. IRT uses the temperature difference between the rotor blade and the surrounding air to visualize the inherent difference in convective heat transfer, i. e. the resulting difference in blade surface temperature, which corresponds to the different boundary layer flow...

The green hydrogen transformation of the iron and steel industry is considered a technically viable option. Concretely, large-scale renewable energy generation and water electrolyzer capacity are to be added to the production system. Given that renewables are intermittent and demand is high, there is continued reliance on the emitting upstream power system. This paper introduces a novel operating concept that regards an extended production system that includes not only the renewables and water...

Die Position des Übergangs zwischen laminarer und turbulenter Strömung beeinflusst die aerodynamische Effizienz der Rotorblätter von Windenergieanlagen. Ein etabliertes Messprinzip für die Visualisierung der Strömung ist die Infrarot-Thermografie, die Messungen an in Betrieb befindlichen Windenergieanlagen ermöglicht, einschließlich Lokalisierung des Strömungsübergangs. Hier werden die Möglichkeiten einer Bayesschen Bildauswertung zur Nutzung von Vorwissen untersucht, um die Messqualität insbeso...

Multi-energy systems have emerged as a potential solution to tackle the flexibility challenges caused by the integration of renewable energy resources. However, the uncertainty of multi-energy load growth and long-term energy cost fluctuations considerably affect the planning and deployment of such energy systems. Furthermore, the transition from fossil energy sources and traditional energy carriers, such as natural gas, to power-based systems is expected to intensify. Therefore, future energy s...

Polymer electrolyte membrane water electrolyzers (PEMEL) have been identified as a key component in a decarbonized large-scale energy system, as they can produce high-purity hydrogen from renewable electricity sources for the chemical industry or energy storage. However, the long-term durability and performance of PEM electrolyzers remain a major challenge, with degradation being a critical factor that limits their lifespan and efficiency. Recent studies have focused on developing accelerated...

Discussions about the transition to hydrogen in various applications have become an important topic in recent years. A key factor for an effective transition is public acceptance of hydrogen technologies. However, the increase in acceptance depends, among other things, on individual knowledge about the hydrogen colors and the linked hydrogen production pathways currently under discussion. In communications, colors such as green, grey and blue are used to distinguish hydrogen sources. With new re...

The currently most promising approach for reducing CO2 emissions of the global steel production is reducing iron ore in shaft furnaces with (green) hydrogen instead of blast furnaces. Unlike to the liquid iron produced in blast furnaces, the direct reduced iron produced in this route (green iron) exists in a solid state and can be transported at reasonable costs over long distances. This allows for spatial decoupling of the iron reduction step from the steelmaking step and may lead to global tra...

The import of hydrogen and derivatives forms part of many national strategies and is fundamental to achieving climate protection targets. This paper provides an overview and technical comparison of import pathways for hydrogen and derivatives in terms of efficiency, technological maturity and development and construction times with a focus on the period up to 2030. The import of hydrogen via pipeline has the highest system efficiency at 57–67 % and the highest technological maturity with a techn...