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Dissertations / Theses on the topic 'Coal fired power stations in South Africa'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Johnson, Angelo Gerald. "Assessing the change in hydro-geochemical properties of fly ash over time when disposed into opencast coal mines in Mpumalanga, South Africa." University of the Western Cape, 2019. http://hdl.handle.net/11394/6927.

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Masters of Science<br>Eskom supplies to 95% of South Africa’s energy needs and it primarily comes from coal combustion at their coal–fired power stations. Large volumes of fly ash are generated at these coal-fired power stations as a by-product of the coal combustion process. Fly ash is disposed onto landfills at the respective power stations and these landfills are currently running out of storage space. Subsequently, there are concerning environmental impacts upon the natural water environment resulting from coal mining. More specifically, the discharge of acid mine (AMD) water from historic

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2

Abanda, Peter Azah. "Impact on soil chemistry of atmospheric sulfur fallout near Arnot coal-fired power station, in the Eastern Transvaal highveld region, South Africa." Master's thesis, University of Cape Town, 2000. http://hdl.handle.net/11427/4184.

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Includes bibliographical references.<br>The objective of the study was to evaluate the potential impact of atmospheric sulfur deposition on the soils surrounding Arnot power station. In particular, the study focused on the relationship between sulfur and organic carbon (OC) and on the various pools of sulfur in the soil. A representative selection of collected soil samples was characterized both physically and chemically in the laboratory. In addition to the representative soils sampled in 2000, archived soils sampled in 1996 and 1999 from the same area were included in some of the chemical an

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3

Vicente, Annalisa Sarga. "Assessing different coal combustion residue backfill scenarios in opencast coal mines, Mpumalanga, South Africa." University of Western Cape, 2020. http://hdl.handle.net/11394/7853.

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>Magister Scientiae - MSc<br>Coal-fired power stations produce large volumes of coal combustion residues (CCRs), which are disposed of in hold ponds or landfill sites. These ash storage facilities are limited in space and are approaching the end of their capacities, thus additional land is required for extensions. If new land is not sourced, power plants will be forced to cease operations, resulting in increased expenditure costs and environmental liability. A proposed disposal solution is to backfill opencast coal mines with CCR monoliths. However, there is limited knowledge on the hydr

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4

Le, Roux Armand. "Opportunity for electricity generation from discard coal at the Witbank Coalfields." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/97416.

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Thesis (MDF)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Coal export mines in the Mpumalanga Highveld region of South Africa generate growing volumes of discard coal estimated to be in excess of a billion tonnes. It presents a significant pollution hazard. Discard coal has a usable carbon content that can be used in the generation of power through the application of fluidized bed combustion technology. The objective of this study was to evaluate its potential as an economically viable fuel source for generation of electricity at the Witbank coalfields. This study was motivated by

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5

Wilreker, Gerlinde Isabelle. "A comparative study of emissions from coal-fired power stations in South Africa and other selected countries." Thesis, 2009. http://hdl.handle.net/10210/1976.

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M.Sc.<br>Worldwide, coal is one of the major sources of energy. In 1999 it was estimated that the global electricity generation from coal was about 36% of the total world electricity production (Knapp, 1999:11). With the combustion of coal for electricity generation however, negative environmental impacts occur. These are mainly caused by carbon dioxide, nitrous oxides, sulphur dioxide and particulate matter emissions. With an ever-growing global population, the need and demand for electricity is increasing. These needs and demands need to be addressed in an economically, socially and environm

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6

Coventry, Timothy Edward Jan. "Controlled coal blending for power station optimisation." Thesis, 2012. http://hdl.handle.net/10210/6313.

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M.Ing.<br>Eskom's power stations receive their main supply of coal from mines next to the power stations. The coal supply contracts only specify maximum allowable variations of some coal quality parameters. The quality of the supplied coal can, however, vary greatly within a few hours. The boilers in the power plant are optimized for a certain quality of coal, while the supplied coal is burnt as it is received from the mine. The variations in the coal quality can, therefore, have a negative impact on both the life expectancy and maintenance costs of the power plant as well as the controllabili

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7

Harebottle, Charles. "Investigation and design of a storage and handling system for future coal fired power stations in South Africa." Thesis, 2015. http://hdl.handle.net/10539/16722.

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8

Muthige, Mavhungu Sydney. "Ambient air quality impacts of a coal-fired power station in Lephalale area." Thesis, 2014.

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Lephalale Municipality is a predominantly rural Municipality with 38 villages, two townships (Marapong and Onverwacht) and one town, Lephalale. Lephalale, formerly known as Ellisras, is a town situated in the “heart of the Bushveld” in Limpopo province. The town is growing rapidly and more industries are becoming concentrated within this small town. The construction of Medupi power station which is underway and other projects such as the expansion of Grootegeluk mine (coal 3 and 4 projects), and road developments in the area; have led to concern about the ambient air quality of the area. Other

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9

Aphane, Manthulane Hezekiel. "Effect of different types of coal in thermal performance of economisers in power stations." 2014. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001355.

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M. Tech. Mechanical Engineering.<br>Discusses the economiser design to absorb as much heat as possible within the flue gases. Fly ash particles, a product of combustion, entrained in the flue gas of the furnace part of the boiler in coal fired boilers, affect economiser thermal performance by causing erosive wear and scale on the outer surface of the economiser tubes along the flow path, which in turn increases the thermal resistance characterisation of coals in relation to combustion behaviour traditionally relies on staged quenching of the reaction and subsequent gravimetric analysis of the

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10

Angelova, Mia. "The nitrogen and sulfur status and isotopes of soils within the vicinity of a coal-fired power station in South Africa." Thesis, 2013. http://hdl.handle.net/10539/12708.

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A dissertation submitted to the Faculty of Science, University of Witwatersrand, in fulfilment of the requirements for the degree of Masters of Science Johannesburg, 2012.<br>Amplified loads of sulfate and nitrate have caused increased stress on soil systems in many areas of the world, as both are dominant components of acid rain. This is a critical environmental stress due to the damage caused to soil, water quality and ecosystem functioning. Issues concerning the rising emissions of these elements from local industries have begun to attract increasing attention in South Africa, as the

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11

Hariram, Melini. "A critical evaluation of the extent to which sustainability was considered in the Medupi power station / Melini Hariram." Thesis, 2015. http://hdl.handle.net/10394/15280.

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Sustainable development is described by the World Commission on Environment and Development as ―development that meets the needs of present without compromising the ability of future generations to meet their own needs‖. Sustainability assessments are an integrative process and framework for effective integration of social, economic and ecological considerations in significant decision-making processes. Sustainability is incorporated into South African legislation such as the Constitution of the Republic of South Africa (1996), the National Environmental Management Act (Act 107 of 1998), as we

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12

Hutchinson, Lydia. "An initial investigation into key soil processes and associated influences on N and S cycles of grassland site near a coal-fired power station, Mpumalanga, South Africa." Thesis, 2013. http://hdl.handle.net/10539/12705.

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13

"Critical path method as a project modelling technique in coal refurbishment projects." Thesis, 2015. http://hdl.handle.net/10210/13828.

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M.Ing. (Engineering Management)<br>South African power demand has been increasing over the past years due to increase in energy consumption from industrial, commercial and residential sectors. In order to meet the growing power demand Eskom Holdings Limited SOC (Eskom) has implemented a number of initiatives such as the energy efficiency programme, power generating capacity increase and refurbishment of the operational coal fired power stations. Energy efficiency initiatives have been designed to encourage residential, commercial and industrial customers to use energy efficient technologies wh

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14

Mafamadi, Mercia Aluwani. "Impacts of greenhouse gases from coal power stations on climatic trends in Witbank areas, South Africa." Diss., 2017. http://hdl.handle.net/11602/1066.

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MESHWR<br>Department of Hydrology and Water Resources<br>Greenhouse gases (GHGs) from coal power station affect the behaviour of climatic parameters such as the temperature, rainfall and evaporation, over a long period of time, hence causing climatic trends. This study focused on investigating the impacts of Greenhouse gases (GHGs) from coal power stations on climatic and hydrological trends in Witbank area. To accomplish this, linear regression (LR) and Mann-Kendall (MK) trend test were used to detect the hydro-climatic trends and their significance. GHG emissions were obtained from Esko

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15

Nkambule, Nonophile P. "Measuring the social costs of coal-based electricity generation in South Africa." Thesis, 2015. http://hdl.handle.net/2263/45866.

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Energy technologies interact with the economic, social and environmental systems, and do so not only directly but indirectly as well, through upstream and downstream processes. In addition, the interactions may produce positive and negative repercussions. To make informed decisions on the selection of energy technologies that assist a nation in reaping the socio-economic benefits of power generation technologies with minimal effects on the natural environment, energy technologies need to be understood in the light of the multifaceted system in which they function. But frequently, as disclosed

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16

Siagi, Otara Zachary. "Flue gas desulphurisation under South African conditions." 2010. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000444.

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D. Tech. Mechanical Engineering.<br>Investigates and/or rank the performance of locally available materials (i.e. limestone, dolomite, or calcrete) as sorbents in the capture of SO2 emissions from coal-fired power plants. Two experimental procedures were adopted in this work: the pH-stat method was used to simulate conditions encountered in wet flue gas desulphurisation (WFGD); and the fixed-bed reactor was used to simulate conditions encountered in the dry in-duct flue gas desulphurisation (DFGD) process. It is important to note that most studies of using calcium-based materials as sorbents f

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17

Govender, Indran. "A comparative environmental analysis of fossil fuel electricity generation options for South Africa." Thesis, 2009. http://hdl.handle.net/10210/2004.

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M.Sc.<br>The increased demand for electricity in South Africa is expected to exceed supply between 2004 and 2007. Electricity supply options in the country would be further complicated by the fact that older power stations would reach the end of their design life beyond the year 2025. In light of this and considering the long lead times required for the commissioning of new plants, new power supply options need to be proactively investigated. The environmental impacts associated with coal-fired generation of electricity have resulted in increased global concern over the past decade. To reduce

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18

Bruyns, Lenke. "Investigating the relationship between coal usage and the change in cations and sulphate fluxes in three rivers in the Waterberg, South Africa." Thesis, 2016. http://hdl.handle.net/10539/21012.

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The Matimba and soon to be completed Medupi power stations located in close proximity to the town of Lephalale are a cause for environmental concern due to the known effects that coal combustion has on air, soil and water quality. The Medupi power station is currently being constructed, while the Matimba power station may have already negatively altered the water quality of the rivers especially those downwind of the power stations. The Lephalala (perennial river, upwind), the Mokolo (perennial river, upwind) and Matlabas (seasonal river, downwind) Rivers were selected due to the locations rel

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19

Phala, Raesibe Nelvia. "Using an inferential model to estimate dry deposition of SO2 and NOX (as NO2) in Lephalale in the Waterberg-Bojanala priority area." Thesis, 2016. http://hdl.handle.net/10539/19339.

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A dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Master of Science June 2015<br>Lephalale is the home of Matimba, one of Eskom’s coal-fired power stations. Matimba is the biggest power station with a dry cooling system in the world. There are other industries (including coal mines) currently in operation in close proximity to the station. This industrial area is expected to grow as more industrial activities are planned for the following years. These activities will aggravate the levels of ai

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20

Ramagoma, Mbavhalelo Justice. "Coal fly ash waste management challenges in the South African power generation sector and possible recycling opportunities: a case study of Hendrina and Kendal power stations." Thesis, 2018. https://hdl.handle.net/10539/25871.

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A dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg In fulfillment of the requirements for the degree of Master of Science in Geography and Environmental Studies 31 May 2018<br>South Africa will be dependent on coal for power generation for many decades to come, before a complete transition is achieved where more energy will be generated from non-fossil fuel sources. Through case studies of Hendrina and Kendal Power Stations, this study explored how the management of fly ash (FA) waste in South Africa can be improved to minimise its impact on t

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21

Okedeyi, Olumuyiwa Olakunle. "Assessment of polycyclic aromatic hydrocarbon (PAHs) and heavy metals in the vicinity of coal power plants in South Africa." Thesis, 2012. http://hdl.handle.net/10500/12001.

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The distribution and potential sources of 15 polycyclic aromatic hydrocarbons (PAHs) in soils and Digitaria eriantha in the vicinity of three South African coal-fired power plants, Matla, Lethabo and Rooiwal were determined by gas chromatography–mass spectrometry. An ultrasonic assisted dispersive liquid-liquid microextraction (UA-DLLME) method was developed for the extraction of polycyclic aromatic hydrocarbon in soil, followed by determination using gas chromatography mass spectrometry. The study showed that an extraction protocol based on acetonitrile as dispersive solvent and C2H2Cl2 as ex

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22

"Impact matrix construction for determining siting options for electricity generation systems." Thesis, 2015. http://hdl.handle.net/10210/14323.

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M.Sc.<br>This report details the identification of potential sites suitable for both renewable and non-renewable electricity generating technologies in South Africa. Eskom through its Integrated Electricity Planning Process (IEP) determines future-planning scenarios based on demand and supply side options, while considering expected growth in demand for electricity. Site suitability can have a significant influence on the viability of options selected through IEP ...

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23

Asamoah, Joseph Kwasi. "Requirements for a sustainable growth of the natural gas industry in South Africa." Thesis, 2007. http://hdl.handle.net/10539/2103.

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Student Number : 9202134A - PhD thesis - School of Civil and Environmental Engineering - Faculty of Engineering and the Built Environment<br>South Africa’s energy economy is dominated by coal, which produces relatively high emissions of greenhouse and noxious gases during combustion. This causes environmental problems that may lead to health risks that are cause for concern. In this thesis, various propositions are tested about whether in the Cape Metropolitan Area natural gas is a lower cost energy source than coal for generating base load power within a specified range of capacity fa

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