Electronic Theses and Dissertations (ETDs): Recent submissions
Now showing items 1-20 of 10946
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Development of an integrated cost model for steel production planning
(North-West University (South Africa), 2019)The international steel-manufacturing industry has been referred to as a driving force for industrial development, which is critical to a country's development. This industry is experiencing several challenges due to a ... -
A compressed air cost savings identification model for deep-level mines
(North-West University (South Africa), 2019)Eskom has requested a 15% electricity tariff increase over the next three years, which will put an increased burden on the South African mining sector. The cost of electricity directly influences the profitability of the ... -
Quantification of logistics performance in ultra deep mining - a South Deep Gold Mine case study
(North-West University (South Africa), 2019)Ultra-deep mining internationally is constrained by various factors that are directly proportional to the operating depth below surface. One of these factors is the logistics related to personnel, material, and ore, ... -
A comparative study of power converters for coupling a renewable source to an electrolyser
(North-West University (South Africa), 2019)Renewable energy sources are receiving much attention due to their clean and sustainable properties. The problem with these renewable energy sources is that they do not provide stable and constant power. Instead, they are ... -
Quantifying uncertainties of aspects of the neutronics modelling of the Kozloduy-6 system using SCALE 6.2.1
(North-West University (South Africa), 2019)This work is based on the benchmark for Uncertainty Analysis in Modelling (UAM) of light water reactors compiled by the Nuclear Energy Agency within the Organisation for Economic Cooperation and Development (OECD/NEA). The ... -
Turbulent wake influence on sailplane performance
(North-West University (South Africa), 2019)A Computational Fluid Dynamics (CFD) study was conducted to investigate the influence of a turbulent wake flow on the aerodynamic performance of the JS-1 sailplane. The Menter (1992c) SST k − ω turbulence model was coupled ... -
Ore variability management at Mamatwan manganese mine for an improved sinter product
(North-West University (South Africa), 2019)Geological and more specifically mineralogical inconsistencies in solid solution variations within natural ore deposits creates processing difficulties in metal production chains. Mamatwan mine established in 1963 produced ... -
Thermal fluid modeling of small scale open Brayton cycle configurations
(North-West University (South Africa), 2019)South Africa's high dependence on coal based power stations for the country's power demand as well as the increase in demand for energy, calls for the development of more efficient energy systems that are capable of utilising ... -
CFD analysis of the heat transfer from a self-launch sailplane radiator
(North-West University (South Africa), 2019)A self-launch sailplane is an aircraft equipped with a retractable engine/propeller combination which can take-off on its own power. The engine can also be used to extend flights if necessary. The engine-driven propeller ... -
Performance predictions for oil contaminated supercritical carbon dioxide gas cooling
(North-West University (South Africa), 2019)The international movement towards using natural refrigerants has resulted in the reinvestigation of trans-critical heat pump cycles using carbon dioxide. Subsequently, a need to predict the heat transfer of oil-contaminated ... -
A method for improving maintainability in object-oriented software applications
(North-West University (South Africa), 2019)The prevailing thesis of software development in today's day and age is that of developing software in rapid development environments. This practice has resulted in software developers achieving higher customer satisfaction ... -
Management of measurement and verification uncertainty for industrial 12L tax incentive applications
(North-West University (South Africa), 2019)South Africa (SA) has committed to reducing its greenhouse gas (GHG) emissions. One of SA's key strategies to minimise GHG intensity is to utilise incentivised energy efficiency initiatives (EEIs). Specifically, the section ... -
Reducing fuel temperature during depressurized loss of forced coolant transients, using neutron poisons in the external reflector in a Once-Through-Then-Out PBMR-200 DPP core
(North-West University (South Africa), 2019)Nuclear power plant safety is an important topic worldwide. It is therefore essential to continue to improve the safety of nuclear power plants. HTR technology improves safety and quality through its inherent design, ... -
Techno-economic evaluation of demilitarized TiCl₄ recycling processes
(North-West University (South Africa), 2019)Demilitarization has become a critical field of study in South Africa over the last decade. With the focus of reusing or recycling all components with potential values, hazardous environmental impacts can be drastically ... -
Optimal resource allocation in Virtual Network Embedding
(North-West University (South Africa), 2019)Optimal resource allocation has become a focus in the technological environment due to the high costs associated with physical infrastructure and space. Furthermore, Network Operators (NO)s have to keep up with the rate ... -
A system to quantify industrial data quality
(North-West University (South Africa), 2019)The digital universe is expanding at an exponential rate { both in size and data variety. This phenomenon, known as big data, is making an impact on all industries. By adopting the big data principle, organisations can ... -
Hybridisation of energy storage for multiple input DC-DC converters
(North-West University (South Africa), 2019)One of the biggest challenges towards achieving efficient and effective energy use in electric vehicles is the energy storage systems. Batteries, though being improved with newer technologies, are still not capable of ... -
Characterisation of the anisotropic mechanical properties of carbon fibre reinforced thermoplastic composites
(North-West University (South Africa), 2019)Fused filament fabrication (FFF) is an additive manufacturing (AM) process of creating solid, three-dimensional objects from a digital file. During this additive process an object is created by laying down successive layers ... -
A cost-benefit analysis of the inclusion of polyimide in fabric filter bags
(North-West University (South Africa), 2019)Electric energy is central to modern society. Although there is a global shift towards renewable energy sources, coal-fired power production remains a widespread electricity generation method. Coal-fired power production, ... -
Discrete element simulation for the loading of a steep incline side wall conveyor
(North-West University (South Africa), 2019)The blast furnace progress team evaluated the equipment operational life of the two different charging systems used at the blast furnace plant. It was determined that the steep incline sidewall conveyor charging system had ...