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Elektrodenlose quecksilberfreie Niederdrucklampen betrieben mit Mikrowellen (2014)
Celal Mohan Ögun ; Rainer Kling ; Holger Heuermann ; Ulrich Gräser ; Christoph Schopp
An Integration Challenge to Bridge the Gap Among Industry-Inspired RoboCup Leagues (2017)
Sebastian Zug ; Tim Niemueller ; Nico Hochgeschwender ; Kai Seidensticker ; Martin Seidel ; Tim Friedrich ; Tobias Neumann ; Ulrich Karras ; Gerhard K. Kraetzschmar ; Alexander Ferrein
Assessment of the lightning transient coupling to control cables interconnecting structures in large industrial facilities and power plants (2000)
Wolfgang J. Zischank ; Alexander Kern ; Ralf Frentzel ; Fridolin Heidler ; M. Seevers
Large industrial facilities and power plants often require a huge number fo information and control cables between the differnet structures. These I&C-cables can be routed in reinforced concrete cable ducts or in isolated buried cable runs. KTA 2206 is the German lightning protection standard for nuclear power plants. During the last several years considerable effort has been made to revise this standard. Despite the well established principles and design guidelines for the construction of the lightning protection system, this standard puts special emphasis on the coupling of transient overvoltages to I&C-cables.
Magnetic Fields and Induced Voltages inside LPZ 1 Measured at a 1:6 Scale Model Building (2004)
Wolfgang J. Zischank ; Fridolin Heidler ; J. Wiesinger ; K. Stimper ; Alexander Kern ; M. Seevers
For the application of the concept of Lightning Protection Zones (LPZ), the knowledge of the magnetic fields and induced voltages inside a structure is necessary. Laboratory experiments have been conducted at a downscaled model of a building (scale factor 1:6) to determine these electromagnetic quantities in case of a direct strike to the structure. The model (3 m x 2 m x 2 m) represented a small industrial building using the reinforcement of the concrete as electromagnetic shield. The magnetic fields and magnetic field derivatives were measured at several location inside the scaled model. Further, the voltages induced on three typical cable routes inside the model was determined. The influence of the lightning current waveshape, point-of-strike, bonding of the cable routes, and bridging of an expansion joint in the middle of the building on these quantities was studied.
Laboratory simulation of direct lightning strokes to a modelled building - measurement of magnetic fields and induced voltages (2002)
Wolfgang J. Zischank ; Fridolin Heidler ; Alexander Kern ; I. A. Metwally ; J. Wiesinger ; M. Seevers
In IEC 61312-2 equations for the assessment of the magnetic fields inside structures due to a direct lightning strike are given. These equations are based on computer simulations for shields consisting of a single-layer steel grid of a given mesh width. Real constructions, however, contain at least two layers of reinforcement steel grids. The objective of this study was to experimentally determine the additional shielding effectiveness of a second reinforcement layer compared to a single-layer grid. To this end, simulated structures were set up in the high current laboratory. The structures consisted of cubic cages of 2 m side length with one or with two reinforcement grids, respectively. The structures were exposed to direct lightning currents representing the variety of anticipated lightning current waveforms. The magnetic fields and their derivatives at several positions inside the structure as well as the voltage between “floor” and “roof” in the center were determined for different current injection points. From these data the improvement of the shielding caused by a second reinforcement layer is derived.
Ökobilanzielle Aspekte technologischer Entwicklungen des Solarturmkraftwerks (2011)
Christoph Ziolko ; Barbara Fricke ; Anette Anthrakidis ; Bernhard Hoffschmidt ; Marius Dillig ; Frank Giese ; Peter Schwarzbözl
AlSol - the open volumetric receiver technology moves to Africa (2010)
C. Ziolko ; M. Schmitz ; Johannes Sattler ; Ahmed Khedim ; Bernhard Hoffschmidt
Recognition of subjects with mild cognitive impairment (MCI) by the use of retinal arterial vessels. (2019)
Jonas Zingsheim ; Timo Grimmer ; Marion Ortner ; Christoph Schmaderer ; Christine Hauser ; Konstantin Kotliar
Influence of the external dynamic wind pressure on the ventilation of double facades (2003)
Claudia Ziller ; Bernd Döring
Numerical simulation of energy consumption of artificial ground freezing applications subject to water seepage (2013)
M. Ziegler ; R. Schüller ; Darius Mottaghy
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