Fachbereich Energietechnik
Refine
Year of publication
Institute
- Fachbereich Energietechnik (609)
- Nowum-Energy (28)
- INB - Institut für Nano- und Biotechnologien (25)
- Solar-Institut Jülich (10)
- Fachbereich Chemie und Biotechnologie (4)
- Fachbereich Bauingenieurwesen (3)
- Fachbereich Medizintechnik und Technomathematik (3)
- ECSM European Center for Sustainable Mobility (1)
- IBB - Institut für Baustoffe und Baukonstruktionen (1)
- Kommission für Forschung und Entwicklung (1)
Language
- English (361)
- German (246)
- Multiple languages (1)
- Dutch (1)
Document Type
- Article (609) (remove)
Keywords
- Earthquake (4)
- Blitzschutz (3)
- Lightning protection (2)
- Algal Turf Scrubber (1)
- Algal–bacterial bioflm (1)
- Alternative Energiequelle (1)
- Antibias (1)
- Artificial intelligence (1)
- BIM (1)
- Basisisolierung (1)
- Bauwerksüberwachung (1)
- Behaviour factor q (1)
- Bemessung (1)
- Biogas (1)
- Cardiovascular MRI (1)
- Circular bioeconomy (1)
- Civil engineering (1)
- DAC (1)
- DIN EN 1996 (1)
- Decoupling (1)
- Diversity Management (1)
- Dynamic simulation (1)
- Emilia-Romagna earthquake (1)
- Empirical consequence curves (1)
- Empirical fragility functions (1)
- Energietechnische Anlage (1)
- Engineering Habitus (1)
- Erdbebeneinwirkung (1)
- Fracture classification (1)
- Frame structure (1)
- Genetic algorithm (1)
- Germany (1)
- INODIS (1)
- INSYSME (1)
- Imaging (1)
- In-plane performance, isolation (1)
- Infill wall design (1)
- Left ventriular function (1)
- Linear elastic analysis (1)
- MR-stethoscope (1)
- Magnetic field strength (1)
- Magnetic resonance imaging (MRI) (1)
- Masonry infill (1)
- Masonry partition walls (1)
- Mauerwerksbauten (1)
- Mauerwerksgebäude (1)
- Methane (1)
- Modern constructions (1)
- Molten salt receiver system (1)
- Molten salt solar tower (1)
- Momentenverteilung (1)
- Monitoring (1)
- Monte Carlo Tree Search (1)
- Morphing (1)
- Multi-storey (1)
- Numerical modelling (1)
- Organizational Culture (1)
- Out-of-plane capacity (1)
- PBEE (1)
- Piping (1)
- Precast buildings (1)
- Probability distribution mapping (1)
- PushoverAnalysen (1)
- Rahmentragwirkung (1)
- Regenerative Energieanlagen (1)
- Reinforced concrete frame (1)
- Risikoabschätzung (1)
- Risikomanagement (1)
- Risk assessment (1)
- Risk management (1)
- Seismic design (1)
- Seismic loading (1)
- Sensor (1)
- Shoulder (1)
- Slab deflection (1)
- Structural design (1)
- Tank (1)
- Transient flux distribution (1)
- Two-phase modelling (1)
- Unreinforced masonry buildings (1)
- Verhaltensbeiwerte (1)
- Wand-Decken-Interaktion (1)
- bio-methane (1)
- body limbs (1)
- bubble column (1)
- carbon dioxide removal (1)
- cardiac gating (1)
- cardiovascular MR imaging (1)
- change management (1)
- churches (1)
- climate neutrality (1)
- concentrating collector (1)
- deserts (1)
- direct air capture (1)
- distribution grid simulation (1)
- diversity management (1)
- e-mobility (1)
- earthquake engineering (1)
- economics (1)
- electrocardiogram (1)
- engineering (1)
- equivalent stiffness (1)
- granular silo (1)
- high field MR imaging (1)
- hypoplasticity (1)
- impulsive effects (1)
- in-plane behaviour (1)
- innovation management (1)
- lightning protection (1)
- liquid-storage tank (1)
- liquid-structure interaction (1)
- lizards (1)
- macro-element (1)
- magnetic resonance imaging (1)
- masonry infill (1)
- methanation (1)
- negative emissions (1)
- nonlinear transient analyses (1)
- out-of-plane behaviour (1)
- phonocardiogram (1)
- plug flow reactor (1)
- point-focussing system (1)
- power-to-gas (1)
- raytracing (1)
- renewable energy (1)
- research association (1)
- rollout (1)
- seismic (1)
- seismic response (1)
- smart-charging (1)
- solar process heat (1)
- structure-soil-structure interaction (1)
- swimming (1)
- truss (1)
- vault (1)
Previous studies optimized the dimensions of coaxial heat exchangers using constant mass fow rates as a boundary condition. They show a thermal optimal circular ring width of nearly zero. Hydraulically optimal is an inner to outer pipe radius ratio of 0.65 for turbulent and 0.68 for laminar fow types. In contrast, in this study, fow conditions in the circular ring are kept constant (a set of fxed Reynolds numbers) during optimization. This approach ensures fxed fow conditions and prevents inappropriately high or low mass fow rates. The optimization is carried out for three objectives: Maximum energy gain, minimum hydraulic efort and eventually optimum net-exergy balance. The optimization changes the inner pipe radius and mass fow rate but not the Reynolds number of the circular ring. The thermal calculations base on Hellström’s borehole resistance and the hydraulic optimization on individually calculated linear loss of head coefcients. Increasing the inner pipe radius results in decreased hydraulic losses in the inner pipe but increased losses in the circular ring. The net-exergy diference is a key performance indicator and combines thermal and hydraulic calculations. It is the difference between thermal exergy fux and hydraulic efort. The Reynolds number in the circular ring is instead of the mass fow rate constant during all optimizations. The result from a thermal perspective is an optimal width of the circular ring of nearly zero. The hydraulically optimal inner pipe radius is 54% of the outer pipe radius for laminar fow and 60% for turbulent fow scenarios. Net-exergetic optimization shows a predominant infuence of hydraulic losses, especially for small temperature gains. The exact result depends on the earth’s thermal properties and the fow type. Conclusively, coaxial geothermal probes’ design should focus on the hydraulic optimum and take the thermal optimum as a secondary criterion due to the dominating hydraulics.
„Smartes“ Laden an öffentlich zugänglichen Ladesäulen – Teil 2: USER-Verhalten und -Erwartungen
(2021)
The optical performance of a 2-axis solar concentrator was simulated with the COMSOL Multiphysics® software. The concentrator consists of a mirror array, which was created using the application builder. The mirror facets are preconfigured to form a focal point. During tracking all mirrors are moved simultaneously in a coupled mode by 2 motors in two axes, in order to keep the system in focus with the moving sun. Optical errors on each reflecting surface were implemented in combination with the solar angular cone of ± 4.65 mrad. As a result, the intercept factor of solar radiation that is available to the receiver was calculated as a function of the transversal and longitudinal angles of incidence. In addition, the intensity distribution on the receiver plane was calculated as a function of the incidence angles.
Silos generally work as storage structures between supply and demand for various goods, and their structural safety has long been of interest to the civil engineering profession. This is especially true for dynamically loaded silos, e.g., in case of seismic excitation. Particularly thin-walled cylindrical silos are highly vulnerable to seismic induced pressures, which can cause critical buckling phenomena of the silo shell. The analysis of silos can be carried out in two different ways. In the first, the seismic loading is modeled through statically equivalent loads acting on the shell. Alternatively, a time history analysis might be carried out, in which nonlinear phenomena due to the filling as well as the interaction between the shell and the granular material are taken into account. The paper presents a comparison of these approaches. The model used for the nonlinear time history analysis considers the granular material by means of the intergranular strain approach for hypoplasticity theory. The interaction effects between the granular material and the shell is represented by contact elements. Additionally, soil–structure interaction effects are taken into account.
The article presents the investigation of the seismic behaviour of a modern URM building located in the municipality of Finale Emilia in province of Modena, Northern Italy. The building is situated in the centre of the series of the 2012 Northern Italy earthquakes and has not suffered any damage during the earthquake series in 2012. The observed earthquake resistance of the building is compared with predicted resistances based on linear and nonlinear design approaches according to Eurocode. Furthermore, probabilistic analyses based on nonlinear calculation models taking into account scattering of the most relevant input parameters are carried out to identify their influence to the results and to derive fragility curves.