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Auflistung nach Schlagwort "Energy conversion"

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Correlated motion of electrons on the Au(111) surface: Anomalous acoustic surface-plasmon dispersion and single-particle excitations

Vattuone, L.; Smerieri, M.; Langer, Thomas; Tegenkamp, Christoph; Pfnür, Herbert; Silkin, V.M.; Chulkov, E.V.; Echenique, P.M.; Rocca, M. (College Park, MD : American Physical Society, 2013)

The linear dispersion of the low-dimensional acoustic surface plasmon (ASP) opens perspectives in energy conversion, transport, and confinement far below optical frequencies. Although the ASP exists in a wide class of ...
Design considerations for the electrical power supply of future civil aircraft with active high-lift systems

Mueller, J.-K.; Bensmann, A.; Bensmann, B.; Fischer, T.; Kadyk, T.; Narjes, G.; Kauth, F.; Ponick, B.; Seume, J.R.; Krewer, U.; Hanke-Rauschenbach, R.; Mertens, A. (Basel : MDPI AG, 2018)

Active high-lift systems of future civil aircraft allow noise reduction and the use of shorter runways. Powering high-lift systems electrically have a strong impact on the design requirements for the electrical power supply ...
Design of a medium voltage generator with dc-cascade for high power wind energy conversion systems

Steffen, Jonas; Lengsfeld, Sebastian; Jung, Marco; Ponick, Bernd; Herranz Gracia, Mercedes; Spagnolo, Aristide; Klöpzig, Markus; Schleicher, Klaus; Schäfer, Klaus (Basel : MDPI AG, 2021)

This paper shows a new concept to generate medium voltage (MV) in wind power application to avoid an additional transformer. Therefore, the generator must be redesigned with additional constraints and a new topology for ...
Effects of cavitation bubble interaction with temporally separated fs-laser pulses

Tinne, Nadine; Knoop, Gesche; Kallweit, Nicole; Veith, Sonja; Bleeker, Sebastian; Lubatschowski, Holger; Krüger, Alexander; Ripken, Tammo (Bellingham, WA : SPIE - International Society for Optical Engineering, 2014)

We present a time-resolved photographic analysis of the pulse-to-pulse interaction. In particular, we studied the influence of the cavitation bubble induced by a fs-pulse on the optical focusing of the consecutive pulse ...
Evaluating carbon dots as electron mediators in photochemical and photocatalytic processes of NiFe2O4

Ombaka, Lucy M.; Dillert, Ralf; Robben, Lars; Bahnemann, Detlef W. (College Park : American Institute of Physics, 2020)

Spinel ferrites such as nickel ferrite are promising energy conversion photocatalysts as they are visible-light absorbers, chemically stable, earth abundant, and inexpensive. Nickel ferrite shows poor photocatalytic activity ...
Experimental Determination of the Uncertainty of the Absorption Coefficient of Crystalline Silicon

Schinke, Carsten; Peest, Peter Christian; Bothe, Karsten; Schmidt, Jan; Brendel, Rolf; Vogt, Malte R.; Kröger, Ingo; Winter, Stefan; Schirmacher, Alfred; Lim, Siew; Nguyen, Hieu T.; MacDonald, Daniel (Amsterdam : Elsevier, 2015)

Based on a combined analysis of spectroscopic ellipsometry, reflectance and transmittance measurements as well as spectrally resolved luminescence measurements and spectral responsivity measurements, we present data of the ...
Measurement uncertainty of radiated electromagnetic emissions in in situ tests of wind energy conversion systems

Koj, Sebastian; Hoffmann, Axel; Garbe, Heyno (Göttingen : Copernicus GmbH, 2018)

The electromagnetic (EM) emissions of wind energy conversion systems (WECS) are evaluated in situ. Results of in situ tests, however, are only valid for the examined equipment under test (EUT) and cannot be applied to ...
Model tests on the control behaviour of a test air supply system in open or closed-loop operation

De Buhr, L.; Fleige, H.; Seume, J. (Bristol : Institute of Physics Publishing, 2018)

The Leibniz Universität Hannover is currently establishing a new mechanical engineering campus which includes a new research building "Dynamics of Energy Conversion" (DEW). This building provides a large compressor station ...
Photoelectrochemical and theoretical investigations of spinel type ferrites (MxFe3-xO4) for water splitting: A mini-review

Taffa, Dereje H.; Dillert, Ralf; Ulpe, Anna C.; Bauerfeind, Katharina C.L.; Bredow, Thomas; Bahnemann, Detlef W.; Wark, Michael (Bellingham, WA : S P I E - International Society for Optical Engineering, 2017)

Solar-assisted water splitting using photoelectrochemical cells (PECs) is one of the promising pathways for the production of hydrogen for renewable energy storage. The nature of the semiconductor material is the primary ...
Radiation and energetic analysis of nanofluid based volumetric absorbers for concentrated solar power

Eggers, Jan Rudolf; Lange, Eckart Matthias.; Kabelac, Stephan (Basel : MDPI AG, 2018)

Recently, several publications gave attention to nanofluid based solar absorber systems in which the solar radiation energy is directly absorbed in the volume of the fluid. This idea could provide advantages over conventionally ...

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Auflistung nach Schlagwort "Energy conversion"

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