Now showing items 1-20 of 28

  • On Resistance and Inductance of Solid Conductors 

    Coufal, Oldřich (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 ...
  • Hybrid Energy System - Optimization and New Concept 

    Morávek, Jan; Mastný, Petr (Lublin University of Technology, 2014-09-16)
    Paper presents a research related to the design of a new concept of hybrid energy system. It describes actually used concepts and the benefits of new design. Subsequently, the problems of the proper systems setting and ...
  • Earth fault location based on evaluation of voltage sag at secondary side of medium voltage/low voltage transformers 

    Topolánek, David; Lehtonen, Matti; Adzman, Mohd Rafi; Toman, Petr (IET, 2015-08-07)
    The main reasons for installation of power quality meters in distribution transformer substations are power quality monitoring and global evolution of electrical network towards the smart grid. In case that all measurements ...
  • Photovoltaic Power Plant Inspection and Diagnostic 

    Vrána, Michal; Morávek, Jan; Mastný, Petr (Lublin University of Technology Publishing House, 2015-09-02)
    This paper presents methods of photovoltaic panel inspection in the field. The aim is to verify value of on-site tests. The basic parameters for comparing the quality of photovoltaic panels are indicated by the manufacturer’s ...
  • Practical Experience of Operational Diagnostics and Defectoscopy on Photovoltaic Installations in the Czech Republic 

    Mastný, Petr; Morávek, Jan; Drápela, Jiří (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 ...
  • On the Selection of Integration Intervals for the Calculation of Mean Absorption Coefficients 

    Kloc, Petr; Aubrecht, Vladimír; Bartlová, Milada; Coufal, Oldřich; Rümpler, Christian (Springer US, 2015-10-18)
    In radiation modeling of thermal plasmas non-grey models are applied where the radiative transport is described in several frequency bands (spectral intervals). Hereby mean absorption coefficients have to be calculated by ...
  • Measurement of the high energy neutron flux on the surface of the natural uranium target assembly QUINTA irradiated by deuterons of 4 and 8 GeV energy 

    Adam, Jindřich; Baldin, Anton Alexandrovich; Chilap, V.; Furman, W.; Katovský, Karel; Kushvatov, J.; Kumar, Vinod; Pronskikh, Vitaly S.; Marin, I.; Solnyshkin, Alexander A.; Suchopár, Martin; Tsoupko-Sitnikov, Vsevolod M.; Tyutyunnikov, S.; Vrzalová, Jitka; Wagner, Vladimír; Závorka, Lukáš (Elsevier, 2015-12-12)
    Experiments with the natural uranium target assembly “QUINTA” exposed to 4 and 8 GeV deuteron beams of the Nuclotron accelerator at the Joint Institute for Nuclear Research (Dubna) are analyzed. The reaction rates of ...
  • Analysis of Intensively Blasted Electric Arc Burning in the Arc Heater's Anode Channel 

    Šenk, Josef; Jakubová, Ivana; Lázničková, Ilona (Czech Technical University in Prague, 2016-10-31)
    The paper deals with the description of the intensively blasted electric arc burning in Ar in the anode channel of the arc heater operated under various conditions. Directly measured experimental data (current, voltage, ...
  • Hybrid Photovoltaic Systems with Accumulation—Support for Electric Vehicle Charging 

    Mastný, Petr; Morávek, Jan; Vojtek, Martin; Drápela, Jiří (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 ...
  • Performance Testing and Methodology for Evaluation of Power Line Communication 

    Mlýnek, Petr; Mišurec, Jiří; Toman, Petr; Šilhavý, Pavel; Fujdiak, Radek; Sláčik, Ján; HASIRCI, Zeynep; Samouylov, Konstantin (Kaunas University of Technology, 2018-06-29)
    The paper describes a unified methodology which takes into account the advantages and disadvantages of different Power Line Communication (PLC) technologies suitable for Smart Metering deployment. The methodology should ...
  • Np-237 transmutation efficiency dependence on beam particle, energy and sample position in QUINTA setup 

    Kilim, S.; Strugalska-Gola, E.; Szuta, M.; Bielewicz, Marcin; Tyutyunnikov, S.; Adam, Jindřich; Stegailov, V.I. (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 ...
  • Experimental investigation and Monte Carlo simulations of radionuclide production inside the Uranium spallation target QUINTA irradiated with a 660-MeV proton beam 

    Tichý, Pavel; Adam, Jindřich; A.A., Baldin; Chudoba, Petr; Furman, W.; Gustov, S.A.; Khushvaktov, Jurabek; Marin, I.; Solnyshkin, Alexander A.; Suchopár, Martin; Svoboda, Josef; Tyutyunnikov, S.; Vespalec, Radek; Vrzalová, Jitka; Wagner, Vladimír; Závorka, Lukáš; Zeman, Miroslav (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 ...
  • Analysis of Approaches for Modeling the Low Frequency Emission of LED Lamps 

    Collin, Adam; Djokic, Sasa; Drápela, Jiří; Guo, Zekun; Langella, Roberto; Testa, Alfredo; Watson, Neville R. (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 ...
  • Evaluation of Filtered Spark Gap on the Lightning Protection of Distribution Transformers: Experimental and Simulation Study 

    Pourakbari Kasmaei, Mahdi; Mahmood, Farhan; Krbal, Michal; Pelikán, Luděk; Orságová, Jaroslava; Toman, Petr; Lehtonen, Matti (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 ...
  • Cross section determination for TAD materials in quasi mono-energetic neutron spectrum from p(Li) reaction 

    Král, Dušan; Zeman, Miroslav; Katovský, Karel; Melyan, Elmira; Holomb, Robert (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 ...
  • Distribution of neutrons and protons in elongated targets 

    Zeman, Miroslav; Adam, Jindřich; Baldin, Anton Alexandrovich; Brunčiaková, Miriama; Gustov, S.A.; Katovský, Karel; Khushvaktov, Jurabek; Král, Dušan; Solnyshkin, Alexander A.; Svoboda, Josef; Šťastný, Ondřej; Tichý, Pavel; Tyutyunnikov, S.; Vrzalová, Jitka; Wagner, Vladimír; Závorka, Lukáš (EDP Sciences, 2020-10-03)
    Analysis of neutron distribution was carried out for two elongated targets. The targets have cylindrical shape and are made of lead and carbon, respectively. The dimensions are approximately one meter in length and 19 cm ...
  • Experimental Investigation of Critical Heat Flux on Different Surfaces at Low Pressure and Low Flow 

    Suk, Ladislav; Petrosyan, Taron; Števanka, Kamil; Vlček, Daniel; Gejdoš, Pavel (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 ...
  • EXPERIMENTAL INVESTIGATION OF CRITICAL HEAT FLUX IN ANNULUS AT LOW PRESSURE AND LOW FLOW PARAMETERS 

    Vlček, Daniel; Suk, Ladislav; Števanka, Kamil; Petrosyan, Taron (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, ...
  • Investigation of critical heat flux on abraded inconel 625 tube 

    Suk, Ladislav; Števanka, Kamil; Petrosyan, Taron; Vlček, Daniel (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 ...
  • Analysis of fast neutron transport in chloride salts using Monte Carlo method 

    Šťastný, Ondřej; Katovský, Karel; Král, Dušan; Krása, Antonín; Kurwitz, Cable; Števanka, Kamil (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 ...