Engineering: Recent submissions
Now showing items 21-40 of 1326
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An integrated ventilation and cooling strategy for mechanised deep-level mining
(North-West University (South Africa)., 2022)Planning of mine ventilation and cooling ensures acceptable environmental conditions underground. To this end, simulation-based planning tools are used for their advantages over calculation-based planning techniques. Various ... -
Applying a benchmark method to identify utility cost-saving opportunities on a platinum mine
(North-West University (South Africa)., 2022)South Africa’s energy and water demands are more significant than the supply thereof. This higher demand means Eskom cannot deliver enough power to South Africa. Furthermore, South Africa is a water-scarce country and water ... -
An investigation into the occurrence of ferroresonance in small distribution transformers in South Africa
(North-West University (South Africa)., 2022)In 2019, an article published by Geldenhuys and Padayachee reported unexpected overvoltages during the commissioning phase of distribution transformers. Consequently, resonance was reported as the cause of overvoltages on ... -
Development of catalyst support structures for hydrogen applications
(North-West University (South Africa)., 2022)Anodized aluminium oxide (AAO) has attracted the attention of scientists and engineers as a source material for the preparation of catalyst support nanostructures. AAO represents a hexagonally distributed pore structure ... -
Utilising mine-cooling auxiliaries for optimal performance during seasonal changes
(North-West University (South Africa)., 2022)Electricity is a major concern for energy-intensive consumers. The price of electricity in South Africa has increased by 300% over the last ten years, and the future price increase is forecasted to surpass inflation. This ... -
Investigation into different 1D/3D thermal fluid co-simulation methodologies as applied to HTR system configurations
(North-West University (South Africa)., 2022)The current PhD research focuses on the investigation into different 1D/3D thermal fluid co-simulation methodologies as applied to HTR system configurations. For the modelling and simulation of complex systems, 1D/3D ... -
A framework to implement digital twin functionalities into web applications
(North-West University (South Africa)., 2022)Digital Twins provide instant physical context to data in complex engineering systems such as mines. They assist with mining operations, performance analysis, planning, and decision making when integrated with sensor ... -
High pressure water supply strategy for mine bulk air coolers
(North-West University (South Africa)., 2022)South African gold mines face many challenges with rising production costs being amongst the biggest concerns. Labour unrest and low economic growth along with increased production costs are affecting the productivity and ... -
Increasing renewable energy penetration on LV networks using intelligent control of virtual power plants
(North-West University (South Africa)., 2022)The global rise in energy consumption has ushered in a new era of technological advancements dictating how energy is generated, distributed and utilised. The surge in the distributed energy resources (DER) penetration ... -
Dehydrogenation of perhydrodibenzyltoluene for hydrogen production: the effect of Mg and Zn dopants on the catalytic activity of Pt/Al₂O₃
(North-West University (South Africa)., 2022)Liquid organic hydrogen carriers (LOHC) are hydrocarbon molecules that have the capacity to store and release hydrogen through catalytic hydrogenation and dehydrogenation reactions. The dibenzyltoluene/perhydrodibenzyltoluene ... -
Solving large scale office scheduling problems as combinatorial auctioning problems
(North-West University (South Africa)., 2022)Within specific exible work models, employees must reserve an office to gain access to one. However, over-bookings and double-bookings arise with such approaches. This can result in the inefficient utilisation of the ... -
Reducing energy consumption of a deep-level platinum mine dewatering system through infrastructure reconfiguration
(North-West University (South Africa)., 2022)South Africa is the largest producer of platinum in the world, accounting for up to 80% of global production. The mining sector contributes significantly to the South African economy, but this contribution is hindered by ... -
Zeolite facilitated adsorption of selected metals associated with mine drainage
(North-West University (South Africa)., 2022)South Africa (SA) is a water scarce country, with 34 % of SA’s total population living in rural areas with very limited access to safe surface and groundwater sources. The pollution of these water sources is caused by many ... -
Technical evaluation criteria for centrifugal pump selection in the petrochemical industry
(North-West University (South Africa)., 2022)Many users are faced with the difficulty of technically evaluating and selecting the most appropriate centrifugal pump for the specific operating condition, due to its required specialised field within mechanical ... -
Comparison of titania and europium tellurium oxide semiconductors in the use of dye-sensitised solar cells
(North-West University (South Africa)., 2022)Energy demand is increasing rapidly every year due to the technological growth occurring across the globe. Photovoltaics are among the preferred methods to answer this ever increasing energy demand. Although photovoltaics ... -
Developing an electrical cost saving methodology for platinum plant auxiliary systems
(North-West University (South Africa)., 2022)The mining of platinum group metals (PGMs) contributes significantly to the South African economy. In 2020, the revenue generated from PGM mining accounted for 2.3% of the country’s total gross domestic product (GDP) (R ... -
Efficacy of the inherent strain method for residual stress determination of additively manufactured IN718 selective laser melted specimens
(North-West University (South Africa)., 2022)Selective laser melting (SLM) is an additive manufacturing (AM) technology that is able to produce metallic components of high complexity using hard to machine alloys such as Inconel 718 (IN718). Throughout the SLM process ... -
Simulation and control of a small scale sodium sulphate salt splitting plant
(North-West University (South Africa)., 2022)Base metal refineries produce sodium sulphate solutions as a waste product in the precipitation step. The solution that is formed generally has a concentration of around 100 g Na2SO4/L. Discharging solutions with such high ... -
Using online partial discharge measurements to optimise asset management of medium voltage cable terminations
(North-West University (South Africa)., 2022)Medium voltage cable terminations are critical components within the electricity network and are expected to have high reliability to ensure network performance and compliance to regulatory requirements. It is evident that ... -
Simulation of the heat and coolant flow for a PMR200 reactor using a network approach in Flownex
(North-West University (South Africa)., 2022)The VHTR (Very High-Temperature Reactor) Prismatic block reactor is one of the reactor designs considered in the range of 4th Generation Reactors which are under development today. The heat generated by the gas-cooled ...
