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Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 298
Tímr, Jan , Mužík, Václav
Role of Simulation of Power Output in the Design of Small-scale Hydro Power Plant

Article focuses on importance of time power-output simulation performed in Matlab in order to identify real hydroelectric potential in selected locations of river flows in the Czech Republic. The difference of simulation and the usual total generated power in a time-period might play&#x...

Kadlec, Petr , Pihera, Josef , Prosr, Pavel , Polanský, Radek
Dielectric analysis of selected polyimide films and derived epoxy-based sandwich composites

Composites with the epoxy matrix are still the most common composites used in high voltage electrical insulation systems. Polyimides are materials with excellent heat resistance and high electrical strength for application, where high overall endurance and reliability even under harsh operating&#...

Kadlec, Petr , Polanský, Radek
Influence of fillers based on different types of tubular halloysite on dielectric properties of epoxy-based composites

The addition of tubular halloysite as a perspective type of mineral filler, even in only a few weight percent, can significantly affect the dielectric properties of base polymer. The resulting dielectric properties of the composite could also depend on the type of selected tubular&...

Kohout, Jan , Šroubová, Lenka
Simulation of heat transfer and air flow inside the switchboard cabinet

Heat transfer and airflow inside the switchboard cabinet of a paragliding flight simulator is modeled with the aim to position its structural parts in the way that prevents them from excessive heating. Heat is produced by losses of electromagnetic origin in some of these parts...

Biskup, Bartoloměj , Bergmann, Benedikt , Broulím, Pavel , Burian, Petr , Malich, Milan , Mánek, Petr , Meduna, Lukáš , Mora Sierra, Yesid , Pichotka, Martin Peter , Pušman, Lukáš , Rubovič, Peter , Slavíček, Tomáš , Smolyanskiy, Petr
Timepix3 detector network for nuclear waste monitoring

In the framework of the MICADO project we proposed an active long-term nuclear waste monitoring system based on Timepix3 technology. Particle detectors based on Timepix3 are capable of particle type discrimination and provide spectrometric information in combination with precise timing informatio...

Jamshidi, Mohammad , Roshani, Saeed , Talla, Jakub , Sharifi-Atashgah, Maryam S. , Roshani, Sobhan , Peroutka, Zdeněk
Cloud-based machine learning techniques implemented by microsoft azure for designing power amplifiers

Designing power amplifiers based on the demanded power and frequency is one of the challenging processes of circuits design in electrical engineering. This is best understood when it comes to thermal noises and other unwanted agents. This is why the application of cloud-based metho...

Jamshidi, Mohammad , Roshani, Sobhan , Talla, Jakub , Mohammadi, Maryam Sadat , Roshani, Saeed , Peroutka, Zdeněk
A modified branch line coupler with ultra-wide harmonics rejection using resonators and open- ended stubs

In this paper, a modified microstrip branch-line coupler (BLC) at 1.6 GHz is designed and simulated. The proposed BLC consists of open stubs and resonators together. The designed BLC correctly works at the operating frequency and suppresses 2nd up to 13th unwanted harmonics. The&#x...

Urban, Ondřej , Georgiev, Vjačeslav , Zich, Jan
Fast FPGA-based serial receiver design

This paper describes a fast serial digital signal receiver for applications in nuclear instrumentation. The proposed design uses a Microsemi Polarfire FPGA embedded Ethernet transceiver for data oversampling (with frequency up to 12.7 GHz) and deserialization. The subsequent FPGA implemented digi...

Lufinka, Ondřej , Kadeřábek, Jan , Prstek, Juraj , Skála, Jiří , Kosturik, Kamil
Comparison of different sensors and localization methods suitable for autonomous robotic platform used in the field of ADAS testing

This paper deals with sensors and localization methods suitable for Autonomous Robotic Platform (ARP). Such a platform is used for ADAS (Advanced Driver Assistance Systems) testing in automotive. At the beginning, the paper gives an introduction to the project and then it focuses o...

Hardoň, Štefan , Kúdelčík, Jozef , Hornak, Jaroslav , Trnka, Pavel , Tamus, Zoltán Adam , Koltunowicz, Tomasz
Effect of ZnO nanoparticles on the dielectric properties of polyurethane and epoxy resins

This study aims to present the influence of Zinc Oxide (ZnO) filler on the dielectric properties of two types of commercial potting compounds. For this purpose, the methods of dielectric spectroscopy were used to measure the changes in dielectric responses of polyurethane and epoxy...

Valenta, Pavel , Koucký, Václav , Hammerbauer, Jiří
Rectifiers for Piezoelecric transformers

In some applications the piezoelectric transformers represent an interesting alternative to the conventional transformers with electromagnetic coupling. The piezoelectric transformer output voltage is generated by the piezoelectric effect. This voltage is generated as a result of charge generation. When&#x...

Hornak, Jaroslav , Prosr, Pavel , Trnka, Pavel , Kadlec, Petr , Michal, Ondřej , Hardoň, Štefan
Effect of MgO nanoparticles on material properties of cold-curing epoxy and polyurethane mixtures

Potting compounds are an integral part of a large number of electrical devices, in which play the role of mainly mechanical or photosensitive protection. So-called cold-curing resins are one of the subgroups of potting mixtures. This article focuses on this type of potting compound...

Michal, Ondřej , Mentlík, Václav , Hornak, Jaroslav
Impact of ultrasonic mixing on the electrical properties of PEI/SiO2 nanocomposites

The usage of nanoparticles in various applications is a widely discussed topic in the science community. One of these applications is dielectrics and the proposition of nanoparticles as modification of matrix material in composites. Epoxy resins are highly used resin material. However, ...

Lovecký, Martin , Závorka, Jiří , Klímek Gincelová, Kristýna , Jiřičková, Jana , Škoda, Radek
Neutron absorber for VVER-1000 storage, transport and final disposal facilities

The recent increasing demand for better nuclear fuel utilization requires higher enriched uranium fuels which is a challenge for spent fuel handling facilities in all countries with nuclear power plants. The operation with higher enriched fuels leads to reduced reserves to legislative a...

Mašata, David , Škoda, Radek , Noháčová, Lucie
The potential of the TEPLATOR application in the central europe region

The innovative emissions-free concept of future district heating source TEPLATOR was introduced in 2020 by a group of researchers from CTU in Prague and UWB in Pilsen in the Czech Republic. TEPLATOR will use already spent nuclear fuel assemblies for a clean and economical heat...

Kořínek, Tomáš , Závorka, Jiří , Lovecký, Martin , Škoda, Radek
Potential of serpent-openFOAM coupled codes for spent nuclear fuel analysis

Operation of future district heating source Teplator with spent nuclear fuel assemblies requires deep analyses. The present article focus on a potential use of coupled neutronics and thermal-hydraulics codes for simulations with the spent fuel. The simulations were conducted in the neutronic...

Abushamah, Hussein Abdulkareem Sale , Jiřičková, Jana , Škoda, Radek , Mašata, David
Evaluating the TEPLATOR concept as a nuclear heating solution compared with other alternatives in the Czech Republic

The heating sector accounts for about 56% of the total final energy consumption in the Czech Republic. District Heating Systems (DHSs) supply nearly 40% of the residential heating demand where the heat sources are mainly coal-based heat-only or CHP plants, causing significant emissions&...

Škoda, Radek , Mašata, David , Peltan, Tomáš
TEPLATOR DEMO: Nuclear heating for Prague central heating network

A case study focusing on the Teplator DEMO deployment for the existing Prague district heating system is presented. The case study aims at existing natural gas/waste/coal district heating Prague portfolio as well as at the network and existing nuclear licensed sites which are&...

Rezaei, Mohsen , Talla, Jakub , Komrska, Tomáš , Peroutka, Zdeněk
Four-leg transformer with defined zero sequence impedance for ground fault compensation

Single-phase ground faults are the most common faults in medium-voltage distribution grids. High-impedance grid grounding using a special four-leg transformer is discussed in the paper. The transformer’s zero-sequence impedance differs from positive-sequence impedance and it is designed to compensate ...

Pittermann, Martin , Blahník, Vojtěch , Straka, Miloš
Current topologies of traction substations for 25kV railway electrification

The paper is focused on AC railway traction system 25kV / 50Hz (respectively 60Hz). Currents progress at fields of power electronic allows to use semiconductors converter as a part of traction substations. It brings more advantages for operation modes of TSS (symmetrization, compen...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 298