scholarly journals State of open wagon body when loading on a rotary car dumper

2021 ◽  
Vol 34 (06) ◽  
pp. 1667-1676
Author(s):  
Ilya V. Chepurchenko ◽  
Svetlana V. Korkina
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Safety Margin ◽  
Operational Reliability ◽  
Rolling Stock ◽  
Design Stage ◽  
Operational Parameters ◽  
Load Bearing ◽  
Modern Computer ◽  
New Generation

The use of modern means of mechanization of loading and unloading operations in places of mass processing of bulky loads in railway and water connection allows to increase the efficiency and productivity of various types of transport, to ensure the safety of load and rolling stock. The most common method of unloading open wagons in ports, mining enterprises, thermal power plants, etc. is the use of special rotary car dumpers. However, it should be noted that unloading on the car dumpers leads to damage of the carriages structural elements. The article presents the results of strength calculations of the car dumper body under the influence of specified dynamic loads from the expiring cargo. They show that the safety margin of the load-bearing elements of the car body is not enough at critical corners of rotation of the car dumper rotor. The studies were carried out using modern computer modeling methods used in the development of new-generation freight car designs. The software package took into account the effects of dynamic loading as external factors that occur at different corners of the car dumper rotor. The implementation of the results obtained at the design stage of innovative structures of open wagon car bodies will allow predicting the operational parameters of load-bearing structures. The presented studies are aimed at improving the safety and operational reliability of the cargo car fleet.

SANITARY PROTECTION ZONES BY NOISE FACTOR FROM GAS DISTRIBUTION POINTS

Akustika ◽  
2021 ◽  
pp. 133-137
Author(s):  
Vladimir Tupov ◽  
Vitaliy Skvortsov
Keyword(s):  
Power Plant ◽  
Natural Gas ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Thermal Power ◽  
Design Stage ◽  
Thermal Power Plants ◽  
Gas Distribution ◽  
Surrounding Area ◽  
Protection Zone

The power equipment of thermal power plants is a source of noise to the surrounding area. One of the sources of noise for the surrounding area are gas distribution points (GDP) of thermal power plants (TPP) and district thermal power plants (RTS). Noise from gas distribution points may exceed sanitary standards at the border of the sanitary protection zone. The article shows that the radiated noise from gas distribution points depends on the power of the thermal power plant (natural gas consumption) and the type of valves. Three types of valves used in gas distribution points are considered. Formulas are obtained for calculating the width of the sanitary protection zone for gas distribution points for thermal stations, depending on the consumption of natural gas (electric power of the thermal power plant) and the type of valve. It is shown that, depending on the valve used, the noise level at the border of the sanitary protection zone can either meet sanitary standards or exceed them. This allows at the design stage to select the required type of valve or to determine mitigation measures from hydraulic fracturing.

scholarly journals Benchmarking of scaling and fouling of reverse osmosis membranes in a power generation plant of paper and board mill: an industrial case of a paper and board mill study

2020 ◽  
Author(s):  
S. Z. J. Zaidi ◽  
A. Shafeeq ◽  
M. Sajjad ◽  
S. Hassan ◽  
M. S. Aslam ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Acid Treatment ◽  
Power Plants ◽  
Saturation Index ◽  
Thermal Power ◽  
Treatment Plant ◽  
Feed Water ◽  
Operational Parameters ◽  
Water Stream ◽  
Reject Water

AbstractThe present study reports the characterization of reverse osmosis (RO) technology at water treatment plant Cogen-2 in paper and Board mills, Pakistan. RO is a commonly used process to obtain de-mineralized water for high-pressure boiler operation in thermal power plants. Scaling and fouling in three-stage RO plants is a major challenge in chemical industry due to the use of raw brackish water in the power plant of paper and board mills. In our study, the feed water quality of RO was changed from soft water to raw water to make it economical. The cleaning frequency was increased three times than normal, which was unsafe for operation and it was required to control scaling and fouling to achieve the desired result. Differential pressures behavior of all stages for 2-month data was observed without acid treatment, and the results of Langelier Saturation Index (LSI) control parameters (temperature, pH, total dissolved solids, calcium hardness, and alkalinity) clearly showed the abnormality. To optimize scaling and fouling of RO, the LSI factor was controlled in total reject water for the next 2 months by acid treatment in feed water. Duration of chemical cleaning and membranes’ life has been extended by fouling and scaling control. Understanding the effect of operational parameters in RO membranes is essential in water process engineering due to its broad applications in drinking water, sanitation, seawater, desalination process, wastewater treatment, and boiler feed water operation. The product flow increased from 18.3 to 19.9 m3/h, and this was due to a decrease in the rejection flow from 8.2 to 6.7 m3/h. The total reject stream pressure also increased from 8.1 to 9 bar. A lower value of LSI of 1.6 is obtained in the reject water stream after the acid treatment.

The DISS Project: Direct Steam Generation in Parabolic Trough Systems. Operation and Maintenance Experience and Update on Project Status

2002 ◽  
Vol 124 (2) ◽  
pp. 126-133 ◽  
Author(s):  
Eduardo Zarza ◽  
Loreto Valenzuela ◽  
Javier Leo´n ◽  
H.-Dieter Weyers ◽  
Martin Eickhoff ◽  
...  
Keyword(s):  
Power Plants ◽  
New Technology ◽  
Thermal Power ◽  
Test Facility ◽  
Steam Generation ◽  
Parabolic Trough ◽  
Solar Thermal Power ◽  
Operation And Maintenance ◽  
Direct Steam ◽  
New Generation

The DISS (DIrect Solar Steam) project is a complete R+TD program aimed at developing a new generation of solar thermal power plants with direct steam generation (DSG) in the absorber tubes of parabolic trough collectors. During the first phase of the project (1996-1998), a life-size test facility was implemented at the Plataforma Solar de Almerı´a (PSA) to investigate the basic DSG processes under real solar conditions and evaluate the unanswered technical questions concerning this new technology. This paper updates DISS project status and explains O&M-related experience (e.g., main problems faced and solutions applied) with the PSA DISS test facility since January 1999.

The DISS Project: Direct Steam Generation in Parabolic Troughs — Operation and Maintenance Experience — Update on Project Status

2001 ◽  
Author(s):  
Eduardo Zarza ◽  
Loreto Valenzuela ◽  
Javier León ◽  
H.-Dieter Weyers ◽  
Martin Eickhoff ◽  
...  
Keyword(s):  
Power Plants ◽  
New Technology ◽  
Thermal Power ◽  
Test Facility ◽  
Steam Generation ◽  
Parabolic Trough ◽  
Solar Thermal Power ◽  
Operation And Maintenance ◽  
Direct Steam ◽  
New Generation

Abstract The DISS (DIrect Solar Steam) project is a complete R+TD program aimed at developing a new generation of solar thermal power plants with direct steam generation (DSG) in the absorber tubes of parabolic trough collectors. During the first phase of the project (1996–1998), a life-size test facility was implemented at the Plataforma Solar de Almería (PSA) to investigate under real solar conditions the basic DSG processes and evaluate the open technical questions concerning this new technology. This paper updates DISS project status and explains O&M-related experience (e.g. main problems faced and solutions applied) with the PSA DISS test facility since January 1999.

Exploratory Research of the Equipment Maintenance Strategy Analysis Method in Design Stage of Nuclear Power Plants

2014 ◽  
Vol 1051 ◽  
pp. 1068-1073
Author(s):  
Li Fei Yang ◽  
Hong Jiang ◽  
Fang Gu
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Operational Reliability ◽  
Design Stage ◽  
Exploratory Research ◽  
Maintenance Strategy ◽  
Analysis Method ◽  
Design Quality ◽  
Maintenance Requirements

The design quality of the nuclear power plants (NPPs) has a direct impact on the operation and maintenance, which involves the safety and reliability of NPPs. Planning and development of the maintenance requirements of system and equipment in initial design stage of NPPs, and determination of reliability maintenance strategy compilation methods enable to fulfill good connection between design and operation of important value. After investigation and analysis, with a combination of reliability analysis method, experience feedback and common analysis approach, the methodology of reliability maintenance strategy compilation in design stage of NPPs has been initially established. And such methodology not only meets the maintenance requirements of system and equipment in design stage, but also enables to check the rationality and operability of process design from the maintenance implementation level, at the same time, it has great value in application regarding improving operational reliability of NPPs and avoiding non-essential major modification during operation of NPPs.

Fuel-Saving Warship Drives

1998 ◽  
Vol 120 (08) ◽  
pp. 63-67
Author(s):  
Steven Ashley
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Power Plants ◽  
Operational Reliability ◽  
Turbine Engines ◽  
Medium Size ◽  
Turbine Engine ◽  
Acoustic Signature ◽  
Heat Recuperation ◽  
New Generation

This article focuses on a fuel-efficient gas turbine engine featuring intercooling and heat recuperation, which is being developed to power a new generation of warships. Modern warships are often powered by gas turbine engines so they can take advantage of the turbine’s rapid response capabilities, solid operational reliability, high power density, and compact dimensions. For medium-size surface combatants such as destroyers, aircraft-derivative gas turbines have become the dominant propulsion engine type, having largely replaced traditional steam or diesel power plants. Though the all-electric concept is far from new, having been applied previously to merchant vessels, the technology is looking better of late. The NRC panel stated that gas turbine propulsion units, modular rare-earth permanent magnetic motors, and power control module technologies have matured to the point that all-electric ships appear feasible. The technology cited “unique advantages” in reduced volume, modular flexible propulsion, lower acoustic signature, enhanced survivability, high propeller torque at low speed, and inherent reversing capability. The result would be a submarine-type propulsion design with diesel-like fuel consumption.

New 215 MWel CFB Power Units for Estonian Oil Shale

2005 ◽  
Author(s):  
Ju¨ri Loosaar ◽  
Hendrik Arro ◽  
Teet Parve ◽  
To˜nu Pihu ◽  
Arvi Prikk ◽  
...  
Keyword(s):  
Oil Shale ◽  
Power Plants ◽  
Thermal Power ◽  
Operational Reliability ◽  
Thermal Capacity ◽  
Operational Experience ◽  
Low Efficiency ◽  
The Moment ◽  
Pulverized Firing ◽  
Basic Power

Estonian basic power supply is over 90% covered by oil shale fired thermal power plants. Total installed thermal capacity of the boilers is 10.7 GWth and every year about 11 millions tons of oil shale is fired. Two different combustion technologies, the old pulverized oil shale firing and the new CFB technology are used at the moment. The new CFB units totaling 430 MWel delivered by Foster Wheeler Energia started operation in 2003–2004. The very first operational experience of CFB units are very promising and all basic problems of oil shale pulverized firing like high air emissions (SO2 — 820–1360 mg/MJ; NOx — 90–110 mg/MJ), fouling and corrosion of heating surfaces, low efficiency and low operational reliability seemed to be solved. Oil shale CFB firing at much lower temperatures (∼800°C) than pulverized firing (∼1400°C) results only partial decomposition of oil shale contained carbonates, meaning lower specific fuel consumption values and decreased CO2 emissions. Also fly ash composition and properties has been changed, which results in different new prospectives of ash utilization possibilities, but also some additional ash land filling problems. The paper analyses the first data of Estonian oil shale industrial CFB firing in the light of almost 40 year experience of Estonian oil shale use in power production.

scholarly journals Modelling the Process of Processing Ash and Slag Wastes of TPP by Means of Consistent Application of CAE- and CAD- systems

2020 ◽  
Vol 174 ◽  
pp. 01019
Author(s):  
Olesya Aksenova ◽  
Evgenia Nikolaeva ◽  
Ibodat Haldybaeva
Keyword(s):  
Technological Process ◽  
3D Modeling ◽  
Power Plants ◽  
Thermal Power ◽  
Appropriate Technology ◽  
Design Stage ◽  
Waste Processing ◽  
Ash And Slag Waste ◽  
Mathematical Processing ◽  
Slag Waste

The article considers the possibility of joint application of mathematical processing and computer 3D modeling of the technological process line for processing ash and slag waste from thermal power plants (TPP). The authors suggest considering an approach to the design of the ash and slag waste processing site by mathematical processing and 3D computer modeling. The mathematical processing with the help of E- network device and the creation of a 3D model allows to plan the site for processing ash and slag waste, select the appropriate technology and thereby ensure the environmental effect of both existing and projected power plants. The authors present the results of processing the technological process of recycling ash and slag wastes of TPP in terms of E-networks using mathematical processing in the Simulink application, which displays the device model from the standard blocks available in the program and performs the necessary calculations. 3D models of individual equipment units selected on the basis of mathematical processing calculations in the Simulink application, were created using computer 3D modeling in a graphical editor. A 3D visualization of the technological section of ash and slag waste processing was performed, which allows to clearly show the planned section at the design stage, which, if necessary, will allow to easily make changes to the project.

scholarly journals Application of various approaches to modeling the gas emissions from TPP cleaning processes

2021 ◽  
Vol 315 ◽  
pp. 01003
Author(s):  
Olesya Aksenova ◽  
Evgenia Nikolaeva
Keyword(s):  
Power Plants ◽  
3D Visualization ◽  
Thermal Power ◽  
Appropriate Technology ◽  
Solid Particles ◽  
Design Stage ◽  
Modeling Tools ◽  
Gas Emissions ◽  
Mathematical Processing ◽  
A Site

The article discusses the possibility of 3D computer modeling tools complex use based on the mathematical processing of the gas emissions from TPP cleaning process. The authors propose to consider an approach to designing a site for capturing solid particles in gas emissions that appear during the production activities of an industrial enterprise by modeling a technological site in various programs. Mathematical processing with the use of the E-network device and the creation of a 3D model enables to plan a site for capturing solid particles in gas emissions, choose the appropriate technology and thereby ensure the ecological effect of both existing and projected power plants. The authors present the results of processing the technological process of gas purification at thermal power plants in terms of E-networks using mathematical processing in the Simulink application, which displays a device model from the standard units available in the program and performs the necessary calculations. 3D models of individual pieces of equipment selected on the basis of mathematical processing calculations in the Simulink application were created using computer 3D modeling in a graphical editor. A 3D visualization of the technological site for capturing solid particles in gas emissions was carried out, enabling a visual display of the planned site at the design stage, which, if necessary, will allow an easy introduction of modifications to the project.

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