scholarly journals Theoretical and Experimental Aspects of Signal Analysis Applied to Solenoid-Type Actuators Used in Gas Valves

2020 ◽  
Vol 13 (3) ◽  
pp. 13-22
Author(s):  
Flaviu-Nicolae Kesucz
Keyword(s):  
Motion Control ◽  
Signal Analysis ◽  
Power Plants ◽  
Thermal Power ◽  
Logic Gates ◽  
Raspberry Pi ◽  
Design Experiment ◽  
Experimental Realization ◽  
Different Types ◽  
Alternating Voltage

AbstractThe purpose of scientific research in this paper is to control the movement of solenoid actuators, by analyzing the applied signal. The actuator in a system is the execution element. The optimization of the system consists in finding new solutions for motion control for solenoid actuators, by designing and experimental realization of a static converter, also called alternating voltage inverter (VTA), which would become proposals for patents, or the realization of new experimental research stands. By analyzing the signal in this paper, it will be possible to design, experiment and test different types of VTA (with Arduino development boards, Raspberry Pi single board computers, logic gates) that will improve the reliability, future operation of thermal power plants.

scholarly journals Experimental Modeling of the Optimized Motion Control of Electromechanical Actuators Used in Thermal Power Plants

2020 ◽  
Vol 13 (3) ◽  
pp. 30-40
Author(s):  
Flaviu-Nicolae Kesucz
Keyword(s):  
Power Plants ◽  
Single Phase ◽  
Thermal Power ◽  
System Optimization ◽  
Thermal Power Plants ◽  
Electromechanical Actuators ◽  
Experimental Stand ◽  
New Research ◽  
Alternating Voltage ◽  
Module System

AbstractThe purpose of scientific research in this paper is to improve the operation of thermal power plants. The experimental stand for the study was made for testing, verifying and adjusting the dynamic parameters of the electromechanical actuators that are integrated in the gas valve component. In order to improve the performance of the thermal power plants by increasing the energetic, mechanical, electrical efficiency, this will be achieved through an alternating-alternative static converter, experimentally realizing the single-phase alternating voltage variable module. System optimization is to find new solutions for controlling the linear motion of electromechanical actuators, including the choice of working principles that would become patent proposals, or new research stands.

scholarly journals Numerical simulation of environmentally-safe technologies in power engineering

2018 ◽  
Vol 44 ◽  
pp. 00076 ◽  
Author(s):  
Alexei Trinchenko
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Environmental Indicators ◽  
Environmental Standards ◽  
Engineering Problems ◽  
Different Types ◽  
Solid Fuel Combustion ◽  
Environmentally Safe ◽  
Reduce Emissions ◽  
Subsequent Incorporation

One of the effective tools of solving engineering problems is the mathematical simulation of newly built and reconstructed industrial equipment. A necessity of solving identical problems fully belongs to ge-nerating equipment of thermal power plants too, which makes the use of methods of mathematic simulation quite a promising one in the course of designing power-generating units. The work presents the results of simula-tion and subsequent incorporation of the method of low-temperature vortex fossil solid-fuel combustion. Based on the developed algorithms and calcu-lation program the assessment of environmental indicators of reconstructed boiler equipment has been carried out and compliance with environmental standards with respect to the level of emissions of gaseous pollutants into environment confirmed. The incorporation of the method being considered into power-generating production has made it possible to reduce emissions of gaseous nitrogen oxides during combustion of coals of different types by 30%.

scholarly journals Separation of Cenospheres from Fly Ashes by Floatation Method

2010 ◽  
Vol 13 (1-2) ◽  
pp. 89 ◽  
Author(s):  
L.M. Manоcha ◽  
K.A. Ram ◽  
S.M. Manocha
Keyword(s):  
Fly Ash ◽  
Power Plants ◽  
Thermal Power ◽  
Ceramic Particle ◽  
Composition Analysis ◽  
High Concentration ◽  
Fly Ashes ◽  
Power Station ◽  
Different Types ◽  
Chemical Composition Analysis

Fly-ashes are non-combustible mineral residues which are produced from coal in thermal power plants. Four different types of fly ashes were collected from different power station in Gujarat. Characterization through SEM shows that fly ash contains cenosphere i.e. gas bubble containing ceramic particle independent of their bulk density. Floatation technique was used for the separation of cenosphere from fly ash. Two solvents with extremely different densities were used for the separation of cenospheres. All methods gave approximately yield of less than 1 % cenosphere in fly ash. Color of cenospheres varied from gray to almost white and the value of density range from 0.4 – 0.8 g/cc. Further, chemical composition analysis revealed that cenospheres do not contain any high concentration of hazardous elements.

Control strategies for frequency regulation in microgrids: A review

2019 ◽  
pp. 0309524X1986842
Author(s):  
A Jeya Veronica ◽  
N Senthil Kumar
Keyword(s):  
Power Generation ◽  
Distributed Generation ◽  
Power Plants ◽  
Control Strategies ◽  
Thermal Power ◽  
Frequency Regulation ◽  
Control Schemes ◽  
Autonomous Mode ◽  
Different Types ◽  
Power Frequency

The electric power generation over the past decade has moved from conventional fossil fuel-fired thermal power plants to tiny-scale system generating power through distributed generation units. A group of such distributed generation units and loads are termed as microgrids. Microgrids can be located near the load centers to supply the load without any loss of power. Frequency regulation in a microgrid operating in autonomous mode is critical because of the intermittent nature of the renewable sources employed. To maintain the frequency regulation within a tolerance limit in a microgrid, proper control schemes have to be adopted in order to increase or decrease the real power generation. Hence, this article explores and presents a critical review of different types of control strategies employed for frequency regulation in microgrids.

scholarly journals Theoretical and experimental aspects of the controlled movement of solenoid actuators by means of the voltage static converter with logic gates

2020 ◽  
Vol 13 (2) ◽  
pp. 22-29
Author(s):  
Flaviu-Nicolae Kesucz
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Scientific Research ◽  
Logic Gates ◽  
Thermal Power Plants ◽  
Electromechanical Actuators ◽  
Static Converters

Abstract The purpose of the scientific research in this paper is to control the movement of electromechanical actuators, through a new voltage convertor. The optimization of the system consists in finding new solutions to control the movement of electromechanical actuators in the gas valve, used in thermal power plants, which can be operated by static converters - with logic gates.

Industrial Resources for the Production of Sulphate Binders

2014 ◽  
Vol 897 ◽  
pp. 53-56 ◽  
Author(s):  
Dominik Gazdič
Keyword(s):  
Construction Industry ◽  
Production Technology ◽  
Power Plants ◽  
Thermal Power ◽  
Flue Gases ◽  
Raw Material ◽  
Thermal Power Plants ◽  
Different Types ◽  
Secondary Raw Material ◽  
Potential Use

The territory of our country is very poor in natural resources of gypsum and the natural resource of anhydrite is missing completely. A considerable amount of gypsum is produced in the country as a secondary raw material originating during the desulphurization of flue gases in thermal power plants using limestone washing and in the chemical industry. This paper describes the different types of industrially generated gypsum, the production technology, and its potential use in the construction industry.

The Usability of Fly Ash for the Construction of Embankment Dams

2012 ◽  
Vol 587 ◽  
pp. 26-30
Author(s):  
Vit Cerný ◽  
Rostislav Drochytka ◽  
Jan Jandora
Keyword(s):  
Fly Ash ◽  
Power Plants ◽  
Thermal Power ◽  
Raw Material ◽  
Site Testing ◽  
The Czech Republic ◽  
Embankment Dams ◽  
Different Types ◽  
Building Area ◽  
By Products

Power supplying industry in the Czech Republic is still dependent on thermal power plants. Due to the on-going and completed renovation of the existing power plant units, it is expected that they will be serviceable for the following 30 years. It is therefore necessary to look for suitable use of the by-products of these plants. Using the energy by-products during construction of dikes is currently limited to creation of little protective dikes on unloading yards of fly ash stabilizers. Here we can take advantage of the binding abilities of the energy by-product to stabilize the unloading yards and protect the environment. This method is technologically less effective for constructions of anti-flood dikes. Therefore we use the soils from the vicinity of the building area. A suitable method of using fly ash in water building industry lies in repairs of existing earth dams by using fly-ash and clay grouting that increase homogeneity, stability and impermeability of the dam. This paper deals with laboratory verification of suitability of different types of fly-ash in the mixture with special sealing clay. It also deals with designing optimal recipes for "on-site" testing. Results of the tests clearly recommend classical fly ash as the most suitable raw material. On the other hand, the bedding ash marked is not suitable for this technology.

Chemical composition of atmospheric particulate matter in the winter season as indicator of environment quality within urban areas

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Anna V. Talovskaya ◽  
Valeria D. Kirina ◽  
Victoria V. Litay ◽  
Tatyana S. Shakhova ◽  
Daria A. Volodina ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Chemical Composition ◽  
Urban Areas ◽  
Power Plants ◽  
Thermal Power ◽  
Winter Season ◽  
Oil Refinery ◽  
Atmospheric Particulate Matter ◽  
Different Types ◽  
Specific Emissions

Abstract This paper shows the results of environment assessment within some cities of Western Siberia (Omsk, Tomsk, Kemerovo) impacted with different types of industries and fuel energy. This assessment is made on the basis of chemical composition study of particulate matter deposited in the snow cover. It is determined the marker elements (heavy metals, radioactive, rare and rare-earth elements) in the particulate phase of snow, which is reflected the specific emissions from different types of industries (oil-refinery, petrochemical plants, mechanical and instrument engineering factories, brickworks, thermal power plants) in the urban areas.

Selective Thermal Emitters for High-performance All-day Radiative Cooling

2021 ◽  
Author(s):  
Ashish Kumar Chowdhary ◽  
Veluri Anurag Reddy ◽  
Debabrata Sikdar
Keyword(s):  
High Performance ◽  
Power Plants ◽  
Thermal Power ◽  
Cooling Power ◽  
Angle Of Incidence ◽  
Conductive Heat ◽  
Large Area ◽  
Experimental Realization ◽  
Atmospheric Transmittance ◽  
High Emissivity

Abstract Passive radiative coolers (PRCs), which pump excess heat to cold exterior space via thermal radiation, have emerged as a promising energy-free technology in cooling buildings, thermal power plants, and photovoltaics. However, designing a ‘daytime’ PRC is challenging due to the simultaneous requirement of high reflectance in the solar spectral regime (0.3–2.5 μm) and high emissivity in the atmospheric transmittance window (8–13 μm). Here, we present a large-area compatible and lithography-free nanoscale multilayer design of daytime PRC based on two pairs of tandem silicon dioxide– aluminium nitride dielectric layer cascaded to a silver ground metal placed over a silicon substrate. We theoretically achieve near-perfect reflectance (97.3%) over the solar spectral regime while maintaining high emissivity (80%) in the atmospheric transmittance window. During the daytime under direct sunlight, the cooling power of the proposed structure is reported to be 115 Wm-2 with a temperature reduction up to 15 K below the ambient temperature, when the effect of convection and conductive heat transfer is considered. Our design is polarization-independent and angle-insensitive up to 70 degrees of angle of incidence. An excellent match between our theoretical and simulation results validates our findings. The fabrication tolerance study reveals that the cooling performance of our robust design is unlikely to degrade much during experimental realization. The figure of merit calculation indicates that our PRC can outperform recently reported daytime PRCs.

scholarly journals Green Concrete Using Waste Rubber Tyre Particles

2021 ◽  
Vol 1 (2) ◽  
pp. 1-5
Author(s):  
Pranav Pratap Singh ◽  
Keyword(s):  
Solid Waste ◽  
Power Plants ◽  
Solid Waste Management ◽  
Construction Material ◽  
Thermal Power ◽  
Concrete Specimen ◽  
Waste Rubber ◽  
Different Types ◽  
Waste Tyres ◽  
Made In

Concrete is perhaps the most often utilized construction material, in which cement and aggregate are unavoidable to manufacture. So, the use of excessive aggregate may lead to higher prices as a requirement of natural resources being costly. Solid waste management is attracting considerable interest these days. Different types of solid waste, such as waste tyres, have become a source of concern because they are not biodegradable nature. In many industries, for instance thermal power plants. The large proportion of discarded tyre rubber is converted into fuels, Cement furnaces, brick furnaces etc. Sad-ly, such use is not environmentally friendly and highly demanding, but it is costly. As a result, use of such leftover tyre rubber in making concrete was deemed to be an additional method of waste disposal. This type of garbage is intended to safeguard the environment. Attempt made in this analysis to classify the different properties mandatory for the creation of concrete mix with rough tyre rubber particles to be used as aggregate in a systematic manner. As part of this project, the M20 grade concrete was selected as the reference concrete specimen. In place of traditional coarse aggregate, rubber tyre granules in the form of cementitious material are employed.

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