Browsing Ústav elektroenergetiky by Title
Now showing items 1-13 of 13
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Analysis of Approaches for Modeling the Low Frequency Emission of LED Lamps
(MDPI, 2020-03-31)Light emitting diode (LED) lamps are now an established lighting technology, which is becoming prevalent in all load sectors. However, LED lamps are non-linear electrical loads, and their impact on distribution system ... -
Analysis of fast neutron transport in chloride salts using Monte Carlo method
(Czech Technical University in Prague, 2020-12-01)The aim of this paper is to present results of fast neutron behavior analysis within the chloride salts environment using simulations based on Monte Carlo method (MCNP 6.2). Three non-fueled salts (NaCl, KCl, MgCl2) and ... -
Cross section determination for TAD materials in quasi mono-energetic neutron spectrum from p(Li) reaction
(EDP Sciences, 2020-10-03)Threshold activation detectors (TAD) are of great importance for a determination of neutron energy spectra and flux density. For different sources, it is necessary to choose the right combination of materials that cover ... -
Evaluation of Filtered Spark Gap on the Lightning Protection of Distribution Transformers: Experimental and Simulation Study
(MDPI, 2020-07-24)Protection of transformers, as one of the most expensive equipment in the power system, against lightning overvoltage impulses is a vital task. This paper, for the first time so far, investigates the effects of a filtered ... -
Experimental investigation and Monte Carlo simulations of radionuclide production inside the Uranium spallation target QUINTA irradiated with a 660-MeV proton beam
(EDP Sciences, 2019-04-03)The accelerator-Driven-System (ADS) is very important to study the neutron field and radionuclide production inside simple-geometry uranium subcritical setups irradiated with high energy particle beams. A subcritical setup ... -
EXPERIMENTAL INVESTIGATION OF CRITICAL HEAT FLUX IN ANNULUS AT LOW PRESSURE AND LOW FLOW PARAMETERS
(Czech Technical University in Prague, 2020-12-01)Steady state flow boiling experiments were conducted on a technically smooth Inconel 625 tube with outer diameter 9.1 mm at inlet pressures 131, 220 and 323 kPa, inlet temperatures 62, 78 and 94 °C and approximately 400, ... -
Experimental Investigation of Critical Heat Flux on Different Surfaces at Low Pressure and Low Flow
(MDPI, 2020-10-06)Steady state flow boiling experiments were carried out on several heated tubes with outer diameter 9.14 mm at outlet pressures 120, 200 and 300 kPa, inlet temperatures 64, 78 and 91 °C and approximately 400, 500, 600 and ... -
Hybrid Photovoltaic Systems with Accumulation—Support for Electric Vehicle Charging
(MDPI AG, 2017-06-22)The paper presents the concept of a hybrid power system with additional energy storage to support electric vehicles (EVs) charging stations. The aim is to verify the possibilities of mutual cooperation of individual elements ... -
INVESTIGATION OF CRITICAL HEAT FLUX ON ABRADED INCONEL 625 TUBE
(Czech Technical University in Prague, 2020-12-01)Aim of this work was to study flow boiling in an annular channel at low pressure and lowflow on a tube with modified surface roughness. The tube with the outer diameter of 9.14 mm and theheated length of 380 mm was made ... -
Np-237 transmutation efficiency dependence on beam particle, energy and sample position in QUINTA setup
(EDP Sciences, 2019-04-03)Np-237 samples were irradiated with spallation neutrons produced at the ADS setup QUINTA. Six experiments were carried out at the JINR, in Dubna – one in carbon (C6+), three in deuteron, and two in proton beams. The energy ... -
On Resistance and Inductance of Solid Conductors
(Hindawi, 2013-03-20)The concepts of resistance and inductance are strewn with misunderstanding and errors that result from inaccurate terminology, mistakes in their definitions, and from the fact that they are quantities that characterize elements ... -
Practical Experience of Operational Diagnostics and Defectoscopy on Photovoltaic Installations in the Czech Republic
(MDPI - Open Access Publishing, 2015-10-12)This paper is focused on the operation of PV power plants in the conditions of the CR. A final analysis of the operational measurements performed and potential approaches and methods applicable to operational diagnosis of ... -
Stabilita elektrizační soustavy
(Vysoké učení technické v Brně, Fakulta elektrotechniky a komunikačních technologií, 2021-02-26)Publikace se zaměřuje na stabilitu elektrizační soustavy a její dílčí problémy – úhlovou, frekvenční a napěťovou stabilitu. Tato témata jsou popsána teoreticky i pomocí příkladů pro program MODES.