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 15 of 15 for “"coal-fired power stations"”.
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Acid deposition in the Eastern Transvaal Highveld
… Highveld, is highly industrialized with several coal-fired power stations, burning coal dumps and heavy industries. The pollution levels in this area have been the centre of much dispute in recent years, and yet little emphasis has been placed on the severity of atmospheric deposition despite the …
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The wear of materials in an ash conditioner
The abrasive nature of fly ash handled in large coal-fired power stations results in unacceptable material and maintenance costs in ash-water mixing plant. Wear testing has been carried out in situ using a variety of generic materials. A ranking order of wear performance has been established both …
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Effects of Lignite Fly Ash on the Degradative Pathways of Aqueous Amine Solvents
… of suspended fly ash present in flue gas from coal-fired power stations. Once present in the solution, they dissolve to produce soluble metal species, which interact with alkanolamine present. The fly ash is composed of aluminosilicate with metals interspersed throughout. The influence of the …
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Three-body abrasive wear of materials
… been shown that although the use of ash from coal-fired power stations as an abrasive produces wear of materials, the volume losses were much smaller than those obtained using silica sand and thus it is considered that the tests using silica gave results which were more reliable. The volume …
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Engineering fundamentals of energy efficiency
… even when compared with renewables, nuclear power and carbon capture and storage. Yet, how should future priorities be directed? Should efforts be focused on light bulbs or diesel engines, insulating houses or improving coal-fired power stations? Previous attempts to assess energy efficiency …
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Key factors influencing the outcome of Energy Projects procured using Public Private Partnerships in South Africa
… by the construction of the Medupi and Kusile coal fired power stations by Eskom, the South African national power utility, which are both running over schedule and are projected to be over budget by 52% and 48% respectively. In contrast, Public Private Partnership contracts between the private …
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Low load operation of turbine-driven boiler feed pumps
… turbines (BFPTs) are in use at a number of Eskom power stations. They utilise bled steam extracted from the main turbine in order to drive multistage centrifugal pumps which supply the boilers with feedwater. With an increase of renewables in the energy mix, the need for Eskom’s coal-fired power …
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Lichens as a biomonitoring tool for detecting heavy metal air pollution associated with industrial activities in Collie, south-western Australia
… measure the heavy metal pollutants emitted from coal-fired power stations and related industries in Collie, south-western Australia, an area with concern over poor air quality. Three different approaches to lichen biomonitoring were investigated. The first explored lichen community composition …
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Influence of heat treatment condition on the stress corrosion cracking properties of low pressure turbine blade steel FV520B
… phenomenon which continues to plague the power generating industry especially in low pressure (LP) steam turbine blades operating in the phase transition zone. An investigation has therefore been conducted to examine the effect of heat treatment condition on the microstructure, mechanical …
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Techno-economic feasibility of a solar assisted coal power plant
The use of solar heat in conventional coal-fired power plants has been demonstrated to reduce the coal consumption of the plant. A reduction in the amount of coal that is burnt by the power plant, means that less greenhouse gases are emitted by the power plant. Hence, the plant has a smaller impact …
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South Africa's energy conundrum: the potential limiting effects of departmentalism on policy decision-making
… integrated into the energy sector. As it stands, coal amounts for almost 95% of the energy mix while nuclear, gas and renewable energy are included in the balance of the energy mix. Coal is a low grade, dirty energy that has a dire impact on the environment. As 11 coal-fired power stations operate …
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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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Dissecting the metabolism of South Africa's power house: Mpumalanga
… this context, South Africa's heavy reliance on coal for primary energy and electricity presents significant challenges, intensified by the nation's persistent issues of poverty, inequality, and unemployment. The risks inherent in the country's inevitable shift away from coal are, however, …
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Characterisation and properties of alkali activated pozzolanic materials.
… Most European countries are well endowed with coal-fired power stations and this produces fly and bottom ash, flue gas desulphurisation (FGD) gypsum. However, less than 25% of the total ash from power stations has found an industrial use mainly in cement and concrete industry. This creates a …
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Mix design, fresh and hardened properties and microstructural characterisation of alkali-activated concrete based on PFA/GGBS blends
… green alternative. In this thesis, fly ash from coal fired power stations and ground granulated blast furnace slag from iron production have been investigated as binders to replace Portland cement. The influence of salient parameters such as percentage of GGBS in PFA/GGBS blend, paste content, …