scholarly journals IMPROVEMENT OF THE ELECTRICAL PROPERTIES OF SYNTHETIC LIQUID DIELECTRIC FOR PULSE CAPACITORS

2020 ◽  
pp. 13-18
Author(s):  
Maya Abdullayeva ◽  
Ibrahim Abulfas Habibov
Keyword(s):  
Castor Oil ◽  
Power Plants ◽  
Dielectric Fluid ◽  
Atmospheric Effects ◽  
Electrophysical Properties ◽  
Adsorption Method ◽  
Oxidative Stabilization ◽  
New Energy ◽  
Liquid Impregnation ◽  
Electrophysical Parameters

An increase in electricity generation is possible not only through the construction of power plants, but also through the creation of fundamentally new energy sources. One of the problems of modern electrical engineering is to ensure the reliability of the operation of capacitors at electric field strengths exceeding I50-200MV. In the domestic and foreign capacitor industry, for heavy pulse modes, castor oil (CO) is used as a liquid impregnation. The development of a method for producing a substitute for natural castor oil, which is a universal impregnating liquid in capacitors, is an urgent problem in the electrical industry. Thus, we have developed a method for the production of acetoxymethyl-w.hexyl-o-xylene, the electrophysical properties of which make it possible to use it as an environmentally friendly and promising substitute for natural castor oil. However, there was a problem of stabilization, since compounds of the ester type have (as impregnating liquids in capacitors) a disadvantage, which consists in their sensitivity to light hydrolysis and atmospheric effects. Ester exhibits high stability with respect to air up to 200 °С, therefore, inhibition by the addition of antioxidants is required is not new. In this work developed the basic electrophysical properties of the ester-acetoxymethyl-secondary hexyl-o-xyleole; methods for its purification and stabilization. There were chosen the adsorption method of thermo-oxidative stabilization to clean dielectric fluid from conductive impurities. As a result of the electrophysical characteristics of the acetoxymethyl-secondary hexyl-o-xyleole ester, as well as the method of its purification using alumina, and hydrogenation on a catalyst representing 0.2 % palladium on alumina and stabilization using additives NG-2246. As a result of the research, it was possible to obtain an ester with improved electrophysical parameters

scholarly journals Thermal Oxidating Stabilization and Cleaning from Conductive Impurities of Dielectric Liquid - Esters

2020 ◽  
Vol 6 (9) ◽  
pp. 204-210
Author(s):  
M. Abdullayeva
Keyword(s):  
Dielectric Liquid ◽  
Dielectric Fluid ◽  
Electrophysical Properties ◽  
Adsorption Method ◽  
Oxidative Stabilization ◽  
Electrophysical Parameters

In this work are developed the basic electrophysical properties of the ester- acetoxymethyl-sec.hexyl-o-xylene; methods for its purification and stabilization. There were chosen the adsorption method of thermo-oxidative stabilization to clean dielectric fluid from conductive impurities. As a result of The electrophysical characteristics of the acetoxymethyl-sec.hexyl-o-xylene ester, as well as the method of its purification using alumina, and hydrogenation on a catalyst representing 0.2% palladium on alumina and stabilization using additives NG-2246. As a result of the research, it was possible to obtain an ester with improved electrophysical parameters.

scholarly journals Assessing The Economic Viability And Fueling Capacity of Renewable Hydrogen: A Way Forward For Green Economic Performance And Policy Measures

2021 ◽  
Author(s):  
Baijun Wu ◽  
Bingfeng Zhai ◽  
Huaizi Mu ◽  
Xin Peng ◽  
Chao Wang ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Wind Power ◽  
Energy Security ◽  
Power Plants ◽  
Large Scale ◽  
Net Present Value ◽  
Green Energy ◽  
Economic Production ◽  
New Energy ◽  
Renewable Hydrogen

Abstract Energy security and environmental measurements are incomplete without renewable energy therefore there is a dire need to explore new energy sources. Therefore, the aim of this study is to measure the wind power potential to generate the renewable hydrogen including its production and supply cost. We used first order eneginnering model and net present value to measure the levelized cost of wind generated renewable hydrogen by using the data source of Pakistan metorological department and State bank of Paksitan. Results shows that the use of surplus wind and renewable hydoregn energy for green economic production is suggested as an innovative project option for large-scale hydrogen use. The key annual running expenses for hydrogen are electricity and storage cost, which have a major impact on the costs of renwable hydrogen. Also, the results indicates that project has the potential to cut CO2 pollution by 139 million metric tons and raise revenue for wind power plants by 2998.52 million dollars. The renewable electrolyzer plants avoided CO2 at a rate of 24.9–36.9 $/ton under baseload service, relative to 44.3 $/ton for the benchmark. However, in the more practical mid-load situation, these plants have a significant benefit. Further, the wind generated renewable hydrogen deliver a 6–11% larger than annual rate of return than the standard CO2 catch plant due to their capacity to remain running and supply hydrogen to the consumer through periods of plentiful wind and heat. Also, the measured levelized output cost of hydrogen (LCOH) was 6.22$/kgH2 and for the PEC system, it was 8.43 $/kgH2. Finally, its mutually agreed consensus of the environmental scientist that integration of renewable energy is the way forward to increase energy security and environmental performance by ensuring uninterrupted clean and green energy. Further, this application has the potential to address Pakistan’s urgent issues of large-scale surplus wind and solar-generated energy, as well as rising enegry demand.

The prediction of CO2 emissions in domestic power generation sector between 2020 and 2030 for Korea

2020 ◽  
pp. 0958305X2097162
Author(s):  
Roosse Lee ◽  
You Ra Gwak ◽  
Jung Min Sohn ◽  
See Hoon Lee
Keyword(s):  
Power Generation ◽  
Power Plants ◽  
Supply And Demand ◽  
Climate Change Policy ◽  
Carbon Reduction ◽  
Change Policy ◽  
Operation Rate ◽  
New Energy ◽  
Paris Climate Agreement ◽  
Domestic Power

In the last ten years, reducing CO2 emissions has been a very important focus across all industries. To efficiently achieve carbon reduction in the power generation sector, various policies, regulations, and legislation have been proposed. In addition, new energy sources and technologies have been developed and widely adopted. In this study, current and future CO2 emissions from the domestic power generation sector were calculated and predicted based on two national power generation plans. The overall power plant efficiencies, operation rate of power plants, power capacities, and CO2 emissions for 2030 were predicted based on the 7th and 8th basic plan for long-term electricity supply and demand in Korea. In addition, the CO2 emissions policies of several major countries announced in accordance with the Paris Climate Agreement were identified and compared with Korea's climate change policy. Finally, the improvement of power generation efficiencies and co-combustion of biomass with coal is recommended to help the reduction of the BAU-based CO2 emissions by 19.4%.

scholarly journals Chinese National Condition Based Power Dispatching Optimization in Microgrids

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Gang Chen ◽  
Jian-Ming Wang ◽  
Xiao-Dong Yuan ◽  
Liang Chen ◽  
Lu-Jia Zhao ◽  
...  
Keyword(s):  
Normal Condition ◽  
Power Plants ◽  
Thermal Power ◽  
Weather Condition ◽  
Weather Conditions ◽  
Pso Algorithm ◽  
Coal Consumption ◽  
New Energy ◽  
Weighted Factor ◽  
Power Dispatching

This paper proposed a study on the power dispatching optimization in the microgrid aiming at Chinese national condition based on PSO algorithm. The whole work is on the basis of the weighted factor variation of the objective function due to different weather conditions. Three cases including the good contamination-diffusing weather condition, the smog weather condition, and the normal condition are considered, respectively. In the case of smog weather, the new energy generation and the battery system will be all out to use as less power as possible from the primary grid so that the pollution produced by coal consumption in the thermal power plants can be upmost reduced. However, in the case of perfect contamination-diffusing weather, the battery is not used to reserve its lifetime, while a large amount of exchanged power from the primary grid is used to obtain a most economic-efficient effect. In normal condition, the power dispatching is performed in a most balanced way considering not only the cost but also the environmental management. The case study in Suzhou Industrial Part confirms the effectiveness of the proposed method in this paper.

Hydrogen-Fueled Combustion Turbine Cycles

1996 ◽  
Author(s):  
Ronald L. Bannister ◽  
David J. Huber ◽  
Richard A. Newby ◽  
John A. Paffenbarger
Keyword(s):  
Conceptual Design ◽  
Power Plants ◽  
Technology Development ◽  
Development Organization ◽  
High Heating Value ◽  
World Energy ◽  
New Energy ◽  
Energy Economy ◽  
Selection Methodology ◽  
Near Future

As part of its World Energy Network (WE-NET) Program, the Japanese New Energy and Industrial Technology Development Organization (NEDO) is funding a Westinghouse-led team to develop conceptual designs of hydrogen-fueled combustion turbine power plants capable of greater than 60% high heating value (HHV) thermal efficiency. The conceptual design task is taking place in the second year of the 28-year program, which has the goal of developing a hydrogen-based renewable energy economy. Due to the requirement that the power plant must be environmentally benign, special closed cycles are being investigated which will meet the requirements of the program while allowing for pilot plant testing in the near future. This paper investigates a variety of possible cycle configurations and working fluids and describes the selection methodology used to identify the best candidate. Optimization of the selected cycle is then described, which results in the basis for the conceptual design.

Performance assessment of new energy-saving schemes for combined heat and power plants

2021 ◽  
Vol 247 ◽  
pp. 114702
Author(s):  
Ying Wu ◽  
Xiaoping Chen ◽  
Ying Dai ◽  
Daoyin Liu ◽  
Jiliang Ma ◽  
...  
Keyword(s):  
Performance Assessment ◽  
Energy Saving ◽  
Power Plants ◽  
Combined Heat And Power ◽  
New Energy

scholarly journals Cloud-Based Application for Smart Grid Simulation

2016 ◽  
Vol 44 (2) ◽  
pp. 81-83
Author(s):  
Szabolcs Tar ◽  
Attila Fodor
Keyword(s):  
Renewable Energy ◽  
Smart Grids ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Distribution Networks ◽  
Decentralized Generation ◽  
Grid Simulation ◽  
New Energy ◽  
Complex Solutions ◽  
Grid Management

Abstract This study provides an overview of the content of an R&D project for increasing the efficiency of smart grids to analyse the energy market, consumption, generation, and renewable energy usage. The new energy participants, for example decentralized generation, dynamic consumption, and weather-dependent power plants, are facing challenges. This project offers solutions to these challenges: modelling of distribution networks, forecasts of renewable energy sources distributed generation (RES-DG), micro-grid management and responses to demand in new, complex solutions. A hardware device is being developed for smart grids and security modules to enhance IT security.

scholarly journals Heat Transfer in the Ducts of the Cooling Systems of Traction Motors

2018 ◽  
Vol 7 (4.3) ◽  
pp. 315
Author(s):  
A А. Aleksahin ◽  
A V Panchu ◽  
L A. Parkhomenko ◽  
H V. Bilovol
Keyword(s):  
Heat Transfer ◽  
Heat Exchangers ◽  
Nuclear Power ◽  
Power Plants ◽  
Cooling System ◽  
Transfer Processes ◽  
New Energy ◽  
Working Media ◽  
Artificial Heat ◽  
The Impact

Requirements for increasing thermal efficiency heat exchangers, which lead to energy saving, material and reduction cost, and as a result of reducing the impact on the environment, led to the development and use of various methods of increasing heat transfer. These methods are called intensification of heat transfer processes. Intensification of heat and mass transfer processes is of great importance for making progress in improving the existing and creation of new energy and heat-exchange equipment. Among the ways of intensifying heat transfer, the swirling of flows of working media is one of the simplest and most common methods and is widely used in energy-intensive channels of nuclear power plants, heat exchangers, aeronautical and rocket and space equipment, chemical industry and other technical devices. We have proposed formulas to determine the cooling air velocity necessary to ensure the required temperature condition of the traction motor assemblies. Decrease in the power of fans in the cooling system using the artificial heat transfer intensification in the ducts was estimated based on the generalization of the results of calculations.  

scholarly journals Rancang Bangun Simulator Kincir Pembangkit Listrik Floating Hydro

2021 ◽  
Vol 2 (1) ◽  
pp. 27-31
Author(s):  
Dian Prabowo ◽  
Pujono Pujono
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Design Method ◽  
Hydroelectric Power Plant ◽  
Process Time ◽  
Hydroelectric Power ◽  
Hydro Power ◽  
New Energy ◽  
Simulator Design ◽  
Increasing Demand

Energy consumption in Indonesia is increasing every year, the fulfillment of the energy needed must be overcome. Energy is something that is really needed by anyone, from humans or animals to be able to do something or work. This energy is also abstract, its existence can be felt, but it is difficult to prove. Electricity needs of the community today are a basic need. Electricity usage is almost 24 hours nonstop. To cope with the increasing demand for electricity, it is necessary to utilize natural resources that can be used as new energy resources. The floating hydro power plant simulator is a hydroelectric power plant that utilizes the flow of water from a pump to drive a waterwheel, a device designed to make it easier for students to learn basic electrical engineering and fluid mechanics. The purpose of this design is to design and build a floating hydro power plant and test the tool. The design method used the VDI 2222 method approach, which includes planning, conceptualizing, designing, finishing. The results of the design were according to the method used, namely in the form of a waterwheel simulator design for power plants. The estimated production process time for the manufacture of a floating hydro simulator for cutting 3.9 hours; process of gurdi 3.08 hours; lathe process 1.3 hours; 1.58 hours assembly process; finishing process 2.75 hours = 1.2 days (1 day = 8 hours). The total cost of making the machine was Rp. 2.605,740.00. The driven pulley test results in 65.4 rpm and the driven pulley produced 304 rpm and the output was 12.3 volts.

Electrophysical properties of composites based on low density polyethylene and zeolite mineral

2020 ◽  
pp. 65-72
Author(s):  
A. M. Maharramov ◽  
◽  
V. J. Dzhafarov ◽  
M. N. Bayramov ◽  
N. Sh. Aliyev ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Natural Zeolite ◽  
Filler Content ◽  
Charge Carriers ◽  
Electrophysical Properties ◽  
Dielectric Parameters ◽  
Ice Water ◽  
Frequency Dependences ◽  
Electrophysical Parameters ◽  
Properties Of Composites

Dielectric parameters (ε′, tgδ) and electrical conductivity (σ) of samples composites of 60 vol. % LDPE/40 vol. % zeolite, 40 vol. % LDPE/60 vol. % zeolite was measured at frequencies 25 – 106 Hz and a temperature range 293 – 403 K. Composites based on a homogeneous mixture of LDPE with powdered natural zeolite (clinoptiolite and heilandite — Agdag deposit, Azerbaijan) were obtained in the form of film samples 140 – 200 microns and 20 mm in diameter, by hot pressing at a temperature of 403 – 413 K and a pressure of 15 MPa, followed by quenching in a mixture of ice-water. The temperature dependence of the electrophysical parameters of the samples of the composites revealed that the dielectric loss tgδ and electrical conductivity σ increase with increasing filler content, and this is due to an increase in the concentration of charge carriers and their mobility. The study of the frequency dependences ε′ = ƒ(logν), tgδ = ƒ(logν) and logσ = ƒ(logν) showed the presence of two linear regions of the frequency dependences of the electrical conductivity, which vary according to the law σас (ν) ∼ ν0,73, and this is more consistent with the hopping mechanism of the electrical conductivity of LDPE/zeolite composites.

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