Fraunhofer Institute for Wind Energy Systems
Fordatis - Forschungsdaten-Repositorium der Fraunhofer-GesellschaftNot a member yet
228 research outputs found
Sort by
Scanning acoustic microscope images for the localization of defects inside dummy pouch cells
No full textThe identification and location of critical defects inside battery cells before the performance decreases or safety issues arise remains a challenge. Here we show images acquired from Scanning Acoustic Microscopy (SAM) as a non-destructive testing methods for the 3D visualization of defects at different depths inside a pouch battery cell. A manufactured dummy pouch cell with 8 cathode sheets is used for this investigation. SAM using a 15 MHz transducer in reflection mode can detect defects with a lateral resolution of 150 µm in 2 min. The time intervals of each micrograph have a length of 30 ns. The images are acquired with a resolution of with a pixel dimension of 50 x 50 μm²/ pixel
The effect of low-carbon processes on industrial excess heat potentials for district heating in the EU: a GIS-based analysis
No full textThe two datasets are supplement to the publication Manz, Pia; Fleiter, Tobias; Eichhammer, Wolfang: "The effect of low-carbon processes on industrial excess heat potentials for district heating in the EU: a GIS-based analysis" (https://doi.org/10.1016/j.segy.2023.100103). Excess heat from industrial processes can be utilized in district heating networks, thereby reducing the primary energy demand and possibly CO2 emissions for district heating generation. Many studies found a substantial potential of industrial excess heat; however, they did not systematically consider the potential future changes in the energy system that will affect the potential excess heat utilization. Industrial production will transform to low-carbon processes and district heating needs to be generated without fossil fuels. Here, we quantify industrial excess heat by spatial matching for the EU-27, considering the impact of the transformation to a climate-neutral energy system. In a first step, excess heat potentials from energy-intensive industries are identified as point sources, taking into account process changes. In a subsequent step, the excess heat potentials are spatially matched to district heating areas with a GIS-based approach. The results show, that available excess heat will reduce significantly due to industry transformation. At the same time, the utilization potential could be increased by lower district heating system temperatures and by an expansion of district heating areas, resulting in 3 - 36 TWh/a. Locally, there is a significant contribution of industrial excess heat in the future, even though the major share will need to be supplied by renewables.Reiner-Lemoine-StiftungFraunhofer Cluster of Excellence "Integrated Energy Systems" (CINES)Open in Microsoft Excel.Data of excess heat sources are georeferenced with coordinates, open in GIS (WGS 84 (4326)
Version 2 (30.07.2024)
No full textThis working paper describes the quantitative and model-based methodology used in HYPAT to assess hydrogen and Power-to-X (PtX) export potentials in the countries Morocco, Ukraine, Namibia, Turkey, United Arab Emirates, Kenya, Chile, Canada, Brazil, and New Zealand. The results of the techno-economic assessment are further used as a basis for a global hydrogen and PtX atlas, and as an indication of the price development of hydrogen and PtX
European Truck Parking Locations
No full textThis geospatial dataset presents real-world locations (latitude, longitude) of potential heavy-duty truck parking locations in Europe (EU-27, EFTA, UK). Coverage and completeness varies among countries. GPS coordinates may not match exact locations but should be considered as reference point for detailed local analyses of ambient conditions and truck parking suitability. Fraunhofer ISI does not assume any liability for completeness, correctness and accuracy of the information.
Such a real-world dataset is invaluable when designing future European infrastructures for low-carbon road freight transport, particularly charging infrastructure networks for battery-electric trucks in long-haul operation but also hydrogen refuelling station networks. Therefore, it is a valuable resource for researchers, industry representatives such as charging point operators and grid network operators, or public authorities.
Details and references are provided in the .pdf document. More information is available upon request
Synthetic ambient seismic noise dataset for testing ambient-noise methods
No full textWe present a continuous seismic waveform dataset created with the rotated staggered-grid finite-difference simulator HeidimodX (Saenger et al., 2000). The aim of the dataset is to recreate the random nature of ambient seismic noise using numerous synthetic point sources with arbitrary source parameters and locations. Three-component waveforms are recorded at the free surface of a three-dimensional model with two different velocity structures. This dataset can be used to benchmark and test robustness of different methodologies typically applied to ambient noise data.This project has been subsidized through the Cofund GEOTHERMICA, which is supported by the European Union's HORIZON 2020 programme for research, technological development and demonstration under grant agreement no. 731117 (DEEP). The german sub-project DEEP-SIGHT has been funded by the 'Bundesministerium für Wirtschaft und Klimaschutz (BMWK)' under project number 03EE4016. The author's gratefully acknowledge the Gauss Centre for Supercomputing e.V. for funding this project by providing computing time through the John von Neumann Institute for Computing (NIC) on the GCS Supercomputer JUWELS at Jülich Supercomputing Centre (JSC).Data is provided in big-endian binary format and can be read on every operating system. An example code snippet to read the data in python is provided in the attached pdf documentation
Archive of primary data for the doctoral thesis "Doping of tetrahedral amorphous carbon to increase damage tolerance and temperature stability"
No full textDas Archiv enthält eine tabellarische Übersicht von Messdaten zur Doktorarbeit "Dotierungen von tetraedrisch amorphem Kohlenstoff zur Steigerung der Schadenstoleranz und der Temperaturstabilität" von Martin Zawisch
Natural ventilation behavior and requirements for mechanical ventilation systems - a study among the German population
No full textDie Energieeffizienz von Lüftungsanlagen wird in der Regel als wichtigstes Kriterium bei den technischen Anforderungen an Lüftungsanlagen beschrieben. Bisherige Studien haben jedoch gezeigt, dass eine Lücke zwischen dem Lüftungsverhalten, das erforderlich ist, um das technische Potenzial mechanischer Lüftungssysteme auszuschöpfen, und dem tatsächlichen Verhalten besteht. In dieser Studie wurden verschiedene Arten des Lüftungsverhaltens, das natürliche Lüftungsverhalten im Allgemeinen und die Anforderungen und Prioritäten von Bewohner:innen an mechanische Lüftungssysteme, mittels einer quantitativen Online-Fragebogenerhebung in der deutschen Bevölkerung (N = 952) untersucht. Darüber hinaus wurden Präferenzen für Interfaces der Bedienelemente und Fernsteuerung erfasst.“Fassadenintegrierte Heizung + Kühlung, Lüftung und Sanitär” (FIHLS Projekt)) als Teil der Initiative: “Verbundvorhaben LowEx-Konzepte für die Wärmeversorgung von sanierten Mehrfamilien-Bestandsgebäuden (LowEx-Bestand)
Improved FRQI on superconducting processors and its restrictions in the NISQ era
No full textThis source code is meant to support the understanding of our paper Improved FRQI on superconducting processors and its restrictions in the NISQ era. In image processing, the amount of data to be processed grows rapidly, in particular when dealing with images of more than two dimensions or time series of images. Thus, efficient processing is a challenge, as data sizes may push even supercomputers to their limits. Quantum image processing promises to encode images with logarithmically less qubits than classical pixels in the image. In theory, this is a huge progress, but so far not many experiments have been conducted in practice, in particular on real backends. Often, the precise conversion of classical data to quantum states, the exact implementation, and the interpretation of the measurements in the classical context are challenging. We investigate these practical questions in this paper. In particular, we study the feasibility of the flexible representation of quantum images (FRQI). Furthermore, we check experimentally the limit in the current noisy intermediate-scale quantum era, i.e., up to which image size an image can be encoded, both on simulators and on real backends. Finally, we propose a method for simplifying the circuits needed for the FRQI. With our alteration, the number of gates can be reduced, especially the one of the error-prone controlled-NOT gates. As a consequence, the size of manageable images increases.This work was supported by the project AnQuC-2 of the Competence Center Quantum Computing Rhineland-Palatinate (Germany)
An OpenFOAM solver for the extended Navier-Stokes equations (rhoSimpleEnseFoam)
No full textPressure-based OpenFOAM solver for the stationary "extended Navier-Stokes equations".Installed OpenFOAM v2006 environment required. Written in C+
Korngrößenklassifizierung Ringversuch Datensatz
No full textThe dataset accompanies the publication "Microstructure quality control of steels using deep learning" and contains images used for a round-robin test where multiple metallographers rated images with respect to the present microstructure and grain size