Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 178 for “"coal-fired"”.
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Tribology in coal-fired power plants
… 90% alumina to 97% alumina content. A nitride fired and an oxide fired SiC particulate composites were also tested for comparison. The impact angle, impact velocity, as well as particle size and type were varied for solid-partide erosion, whereas effects of the applied load, abrasive speed and …
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Arsenic and Selenium Distribution in Coal-Fired Plant Samples
Arsenic and selenium distributions in coal-fired plant samples are studied. This research includes arsenic and selenium concentrations in samples of coal, fly ash, bottom ash, economizer ash, Flue Gas Desulfurization (FGD) slurry and flue gas taken from four power plants with the goal being to …
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A mathematical model of coal-fired fluidised bed boilers
A mathematical model of a large coal-fired fluidized bed boiler for power generation is synthesised. The effect of variations in the main parameters of the model on variables such as the background carbon concentrations in the bed, and the transient response of heat evolution are studied. The …
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The shallow atmospheric coal fired fluidized-bed combustor furnace
… the literature pertaining to the combustion of coal in a fluidized bed of inert. particles as well as the transfer of heat from the fluidized bed to immersed cooling surfaces is presented. In view of the fluidized bed furnace incorporating the freeboard region, a review of furnace design methods …
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Neural Network Modelling and Control of Coal Fired Boiler Plant
… Based Controller (NNBC) for chain grate stoker fired boilers. The objective of the controller was to increase combustion efficiency and maintain pollutant emissions below future medium term stringent legislation. Artificial Neural Networks (ANNs) were used to estimate future emissions from and …
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Exergy Analysis of Pulverized Coal-Fired Ultra Supercritical Power Plants
… generation majorly depends on fossil fuels like coal and natural gases. Among power plants, pulverized coal-fired power plants are of great concern due to the relatively high emission of CO2 per MW of production. The modification of coal-fired power plants has been significantly used in reducing …
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Activated Carbon Injection for Mercury Control in Coal-Fired Boilers
… into the atmosphere is through the burning of coal. The Environmental Protection Agency estimates that the United States consumes i billion tons of coal per year and coal-fired utilities emit 73 tons of mercury per year. Though there arc currently no regulations on mercury emissions, it will …
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A zonal model for radiation heat transfer in coal-fired boiler furnaces
… are a major contributor to load losses in coal-fired power plants. The boiler furnace exit temperature is a key indicator of the combustion and heat transfer processes taking place and has a profound impact on the operation of the heat exchangers downstream of the furnace. Having a model …
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Carbon dioxide capture from coal-fired power plants : a real potions analysis
Investments in three coal-fired power generation technologies are valued using the "real options" valuation methodology in an uncertain carbon dioxide (CO2) price environment. The technologies evaluated are pulverized coal (PC), integrated coal gasification combined cycle (baseline IGCC), and IGCC …
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Evaluating investment in base load coal fired power plant using real options approach
… the impact of uncertainty on investment in a coalfired power plant using a real options (RO) framework. It is organized in five chapters. In the first chapter I give an outline of the thesis.<br/><br/>In Chapter 2 I review the background material. I describe the electricity sector in the pre- …
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Pilot-Scale Evaluation Of Advanced Solvents For CO2 Capture From Coal-Fired Utilities
<p>In 1992, international concern about climate change (a change to Earth's climate, especially those produced by global warming) led to the United Nations Framework Convention on Climate Change (UNFCCC). The ultimate objective of that convention was the "stabilization of greenhouse gas …
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The Measurement & Verification of Energy Conservation Measures at a Coal-fired Power Plant
… improvements in net heat rate at a South African coal-fired power plant (CFPP) following an extensive refurbishment programme. The CFPP consisted of multiple subcritical pulverised fuel generating units and the refurbishment programme aimed to improve the overall net heat rate by 1%. The purpose …
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Economics of coal gasification-combined cycle and coal-fired plants for electric power generation
Includes bibliographical references (pages 92-98).
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Detailed model for robust feedback design of main steam temperatures in coal fired boilers
… temperatures play a significant role in large coal fired power plant operation. Ideally, main steam temperatures should be accurately controlled to protect the thick wall components against long term overheating and thermal stress while meeting the design conditions at the steam turbine inlet. …
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Mercury Transportation in Soil Using Gypsum from Flue Gas Desulphurization Unit in Coal-Fired Power Plant
… from flue gas desulphurization (FGD) units of coal-fired power plants. There are two phases of this research, including field and greenhouse studies. Previous studies indicate that FGD gypsum could increase corn yield, but may lead to more mercury uptake by corn.</p> <p>Recent studies have been …
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Impact on heat rate and subsequent emissions due to varying operation of coal fired power plants
… deterioration in the heat rate with load for the Coal Fired Power Plants that need to accommodate the additional renewable supply. If varying heat rate were to be included in a study, it is often limited to plant specific cases. This PhD presents a novel Variable Turbine Cycle Heat Rate (V-TCHR) …
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FUEL SWITCH TO BIOMASS FOR THE CONTINUED USE OF AN OTHERWISE STRANDED COAL FIRED STEAM ELECTRIC ASSET
Coal fired power plants are facing increasing pressure to reduce emissions through newly enacted and proposed environmental regulations. The cost to install control equipment on the smaller units may not be justified based upon the ability to recover the expense through rate increases on limited …
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Component development for a high fidelity transient simulation of a coal-fired power plant using Flownex SE
Large coal-fired power stations are designed to be run predominantly at full load and optimum conditions. The behaviour of plants, operating at low load and varying conditions, is getting more and more attention due to the introduction of variable renewable generation on the grid. Consequently, the …
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