Concept design of the megawatt power level gyrotron stabilized by a low-power signal for DEMO project

2022 ◽  
Author(s):  
Gregory Denisov ◽  
Andrey Kuftin ◽  
Vladimir Manuilov ◽  
Alexey Chirkov ◽  
Leonid Popov ◽  
...  
Keyword(s):  
Power Generation ◽  
Input Signal ◽  
Free Oscillation ◽  
Wave Beam ◽  
Power Level ◽  
Superconducting Magnet ◽  
Concept Design ◽  
Frequency Locking ◽  
Control Fusion ◽  
Main Components

Abstract The specific features of the main components of the new powerful 230GHz/80kV/40A gyrotron aimed to use in the future control fusion facility DEMO are described. The gyrotron design provides a stable output power generation of more than 1 MW using a superconducting magnet with a moderate size warm bore. Furthermore, the new original quasi-optical converter providing the gyrotron operation in three possible regimes  two free oscillation regimes with co-rotating TE33,13 or counter-rotating TE33,-13 mode, and the regime with frequency locking by the stable input signal  is suggested and optimized. The Gaussian content in the output wave-beam in all above-mentioned regimes is about 98%.

scholarly journals Источник двухчастотного перестраиваемого СВЧ-излучения на основе гироклистрона в режиме биений с входным сигналом

2021 ◽  
Vol 47 (24) ◽  
pp. 37
Author(s):  
Р.М. Розенталь ◽  
Н.С. Гинзбург ◽  
И.В. Зотова ◽  
А.С. Сергеев
Keyword(s):  
Input Signal ◽  
Radiation Source ◽  
Power Level ◽  
The Self ◽  
Excitation Mode ◽  
Spectral Components ◽  
Gyroklystron Amplifier ◽  
Beat Mode ◽  
Synchronization Band ◽  
Frequency Radiation

A new scheme of a two-frequency radiation source based on a gyroklystron amplifier operating in the self-excitation mode and controlled by the input signal is proposed. Using a powerful 3-mm gyroklystron as an example, it is shown that, when operating in the beat mode (i.e., outside the synchronization band), by varying the frequency and power level of the input signal, it is possible to implement continuous independent tuning of the distance between spectral components in the 10-150 MHz range. and the ratio of their amplitudes in the range from -10 to 0 dB.

Sustainable Engineering in the Global Energy Sector

2015 ◽  
Vol 138 (2) ◽  
Author(s):  
Kaufui Vincent Wong
Keyword(s):  
Power Generation ◽  
Electric Power ◽  
Rankine Cycle ◽  
Energy Sector ◽  
Water Sector ◽  
Electric Power Generation ◽  
Sustainable Engineering ◽  
Energy Technologies ◽  
Main Components ◽  
Gas Turbine Cycle

The current age is one in dire need of teaching engineers of all branches about sustainability. The principle is that engineering choices have to be decided in the framework of constraints related to energy and materials and decreasing wastes. The federal government would be the most appropriate entity to take actions to drive the burgeoning of sustainable energy technologies. Coal is the most popular fuel globally used with the Rankine cycle for electric power generation. Most of the electric power produced in the world is generated via the Rankine cycle. One of the most efficient simple thermodynamic cycles for electric power generation currently is the gas cycle using natural gas, with the additional potential to decouple the energy sector from the water sector. The combined gas and Rankine cycle is an even more efficient cycle to generate electric power, but then couples the energy sector again to the water sector. Carbon dioxide, the greenhouse gas with the longest half-life, is still produced with the gas turbine cycle, but to a lesser degree than the Rankine cycle using coal. The main components of the sustainability aspects of the energy sector are outlined. A number of themes related to sustainability in the energy sector are also presented.

scholarly journals Laboratory Testing of Velocity Sensing in a Magnetorheological Damper with Power Generation

2017 ◽  
Vol 11 (3) ◽  
pp. 186-189 ◽  
Author(s):  
Bogdan Sapiński
Keyword(s):  
Power Generation ◽  
Laboratory Testing ◽  
Real Life ◽  
Mr Damper ◽  
Magnetorheological Damper ◽  
Experimental Examination ◽  
Power Generator ◽  
Electromagnetic Power ◽  
Key Issues ◽  
Main Components

Abstract The study summarises the results of experimental examination of velocity sensing capability in a prototype of a magnetorheological damper with power generation (MRD). The device has two main components: an electromagnetic power generator and an MR damper. The study outlines the structure of the device with the main focus on the generator part, and provides results of tests performed under the idle run. The discussion of demonstrates the potentials of MRD action as a velocity-sign sensor and presents key issues which need to be addressed to enable its real life applications.

Modeling of Arbitrary Power Level PV Array Based on Circuit Equivalent Mechanism

2012 ◽  
Vol 424-425 ◽  
pp. 586-591
Author(s):  
Zhang Quan Wang ◽  
You Rong Chen ◽  
Yue Ruan
Keyword(s):  
Power Generation ◽  
Solar Cell ◽  
Simulation Model ◽  
Power Level ◽  
Generation System ◽  
Arbitrary Power ◽  
Pv Array ◽  
Power Generation System ◽  
Output Characteristics ◽  
Pv Power Generation

According to the equivalent circuit of single solar cell and the V-I equation of PV cell based on physical mechanism, a simulation model of single solar cell is established. According to this model and structure feature of PV array, the Thevenin circuit equivalent transform theory is used. The control relationship between single solar cell and PV array is given. Then a simple modeling method for arbitrary power level PV array is proposed. To verify the model effectiveness, a Pspice simulation model is established. Output characteristics of the model and its feasibility in PV power generation system are simulated. Simulation results show that the output characteristics of simulation model are in good consistency with actual PV array, and the model can be effectively applied in simulation of PV power generation system. The modeling method is simple and can be used for simulation on some control algorithms of PV power generation system

scholarly journals Wireless Power Transfer Technologies Applied to Electric Vehicles: A Review

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1547
Author(s):  
Alicia Triviño ◽  
José M. González-González ◽  
José A. Aguado
Keyword(s):  
Electric Vehicles ◽  
Power Level ◽  
Wireless Power Transfer ◽  
Critical Parameters ◽  
Power Transfer ◽  
Wireless Power ◽  
Wireless Charge ◽  
Main Components ◽  
The Cost ◽  
User Intervention

The expansion on the use of Electric Vehicles demands new mechanisms to ease the charging process, making it autonomous and with a reduced user intervention. This paper reviews the technologies applied to the wireless charge of Electric Vehicles. In particular, it focuses on the technologies based on the induction principle, the capacitive-based techniques, those that use radiofrequency waves and the laser powering. As described, the convenience of each technique depends on the requirements imposed on the wireless power transfer. Specifically, we can state that the power level, the distance between the power source and the electric vehicle or whether the transfer is executed with the vehicle on the move or not or the cost are critical parameters that need to be taken into account to decide which technology to use. In addition, each technique requires some complementary electronics. This paper reviews the main components that are incorporated into these systems and it provides a review of their most relevant configurations.

scholarly journals Reliability and maintenance of wind power systems

2020 ◽  
Vol 6 (3) ◽  
pp. 13-23
Author(s):  
Alexandru Marius VIIŞOREANU ◽  
◽  
Alina VIIŞOREANU-RĂCHIŢEANU ◽  
Keyword(s):  
Power Generation ◽  
Power Systems ◽  
Wind Power ◽  
Preventive Maintenance ◽  
Wind Power Generation ◽  
Wind System ◽  
Defect Analysis ◽  
Wind Power Systems ◽  
Main Components ◽  
Power Generation Systems

The paper presents the basics on the reliability and maintenance of wind power generation systems. The positive and negative practical aspects of the operation of a monitored wind system shall be analyzed and the strategies applied to perform maintenance of this system shall be presented in the most commonly known variants: Corrective maintenance, preventive maintenance and predictive maintenance. Defect analysis of the main components of the wind system is carried out in order to improve its reliability.

Observation of voltage fluctuations in a superconducting magnet during MHD power generation

1979 ◽  
Vol 15 (1) ◽  
pp. 295-297 ◽  
Author(s):  
R. Smith ◽  
R. Niemann ◽  
M. Kraimer ◽  
T. Zinneman
Keyword(s):  
Power Generation ◽  
Superconducting Magnet ◽  
Voltage Fluctuations

R&D On Micro-Gasifier for Power Generation From Solid Wastes

2004 ◽  
Author(s):  
Kunio Yoshikawa
Keyword(s):  
Power Generation ◽  
High Temperature ◽  
Waste Treatment ◽  
Solid Wastes ◽  
Wood Chips ◽  
Small Scale ◽  
Generation System ◽  
Evolved Gas ◽  
Power Generation System ◽  
Main Components

A small-scale power generation system including a process of producing low-BTU gas by gasification of wastes has been developed. This system is called as the Micro STAR-MEET. Because the size of this system is small, on-site waste treatment is possible. Wastes are continuously fed into the gasifier and, high temperature air and steam are introduced into the gasifier and reformer to gasify and reform wastes. A pilot plant was constructed in order to investigate the performance of the Micro STAR-MEET system, and experiments using wood chips and plastics as fuels were conducted. Sufficient amount of gas that has 4.0 MJ/m3N HHV was evolved so that the dual-fueled diesel engine could be driven. The main components of the evolved gas were CO and H2. In this study, the gas that could be used as a fuel for the engine was evolved constantly, which indicates that the Micro STAR-MEET system is technically feasible.

Development of PCM Storage for Process Heat and Power Generation

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
Wolf-Dieter Steinmann ◽  
Doerte Laing ◽  
Rainer Tamme
Keyword(s):  
Power Generation ◽  
Latent Heat ◽  
Heat Storage ◽  
Storage Systems ◽  
Power Level ◽  
Average Power ◽  
Cost Effective ◽  
Latent Heat Storage ◽  
Heat Storage Materials ◽  
Process Heat

The increased interest in solar thermal systems using steam as a working medium either for power generation or process heat applications gave rise to a growing demand for latent heat storage units. Essential for the development of cost-effective latent heat storage systems is the achievement of a sufficient power level in spite of the characteristic low thermal diffusivities of latent heat storage materials. The sandwich concept using fins made either from graphite or aluminum has been identified as the most promising option for latent heat storage systems. The feasibility of this approach has been demonstrated by three prototypes using graphite and one prototype using aluminum fins. The prototype with aluminum fins was filled with sodium nitrate and was operated for more than 4000 h without degradation of power. The volume specific average power density is in the range 10–25 kW/m3, so it is proven that the major problem of phase change material (PCM) storage of low heat transfer rates has been overcome and high-temperature PCM storage with large capacity factor is possible.

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