Browsing by Issue Date

Now showing items 1-20 of 46

  • Voltage control of medium to high power three-phase inverter supply systems 

    Jacobs, D. M. (Danver Maxwill) (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: In this thesis a new voltage control method is developed for a three-phase inverter supply system. The inverter supply system consist of a Permanent Magnet Generator, a three-phase rectifier, a three-phase ...

  • Transformerless series dip/sag compensation with a multilevel cascaded inverter 

    Visser, Abraham Johannes (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: This thesis covers the development of a multilevel cascaded inverter for the purpose of costeffective transformerless series dip compensation. Of all known power quality problems, voltage dips are the ...

  • Thermal management of hybrid electrical vehicles using heat pipes 

    Swanepoel, Gerhardus (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: In an effort to improve the fuel efficiency and to reduce emission levels of automobiles, the development of Hybrid Electrical Vehicles (HEVs) has been a major focus area of the automotive industry. ...

  • Taguchi methods in internal combustion engine optimisation 

    Green, Jeremy James (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: Statistical experimental design techniques are powerful tools that are often approached with suspicion and apprehension by experimenters. The trend is to avoid any statistically structured and ...

  • Supercritical fluid extraction of paraffin wax 

    Crause, J. C. (James Christoffel) (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: In this study the deoiling and fractionation of paraffin wax using supercritical fluid extraction (SCFE) has been investigated. SCFE was compared with state-of-the-art processes such as wax crystallisation, ...

  • Semi-automatic extraction of primitive geometric entities from point clouds 

    Goussard, Charl Leonard (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: This thesis describes an algorithm to extract primitive geometric entities (flat planes, spheres or cylinders, as determined by the user's inputs) from unstructured, unsegmented point clouds. The ...

  • A reliable telemetry software design for a satellite system 

    Boshielo, Babudi Turcia (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: One of the requirements for satellite telemetry systems is the provision of reliable telemetry data to allow accurate monitoring of the satellite status. This thesis focuses on the design of telemetry ...

  • Reliability assessment of a prestressed concrete member 

    Brand, W. W. (Willem Wouter) (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: First-order second-moment structural reliability methods are used to assess the reliability of a prestressed concrete beam. This beam was designed for imposed office floor loads and partitions following ...

  • Pyrometallurgical recovery of cobalt from waste reverbaratory furnace slag by DC plasma-ARC furnace technology 

    Banda, Wezi (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: Slag cleaning has become a common practice at many smelters in the nonferrous industry to maximize recovery of valuable metals. However, during the carbothermic reduction of nonferrous slag to recover ...

  • Preparing bus and taxi operators for tendering in the Western Cape 

    Jakoet, J. (Jamiela) (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: In an attempt to improve the efficiency of the transport system, the national government has instituted a new tender system for public transport contracts. Small bus and taxi operators are unfamiliar ...

  • Prediction and measurement of power line carrier signal attenuation and fluctuation 

    De Villiers, Wernich (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: A frequency domain Power Line Carrier (PLC) simulation program, with the ability to simulate signal attenuation including the coupling equipment, was developed. This simulation program was put to the ...

  • The phase equilibrium of alkanes and supercritical fluids 

    Schwarz, Cara Elsbeth (Stellenbosch : University of Stellenbosch, 2001-12)
    Current methods for wax fractionation result in products with large polydispersity, and due to the high temperatures required, thermal degradation of the wax is often incurred. The need for an alternative process thus ...

  • Optimisation of the Ion exchange juice treatment plant at Ashton Cellars 

    Drew, Margaret Jane (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: Recently concern has been raised regarding effluent from wine cellars, as it often does not comply with environmental legislation. It was with this in mind that the effluent problem at Ashton Cellars ...

  • Neural network models of slotted waveguide directional couplers 

    Muller, Martinette (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: The application of artificial neural networks to microwave circuits is investigated. A neural network model is developed for two parallel waveguides coupled by a longitudinal slot in the common broad ...

  • Middleware for the SUNSAT field station 

    Cardoza, Andrew Robert (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: SRMA currently used on the SUNSAT field station is an effective MAC layer protocol but lacks several features. Sufficient support for flexible communication, acknowledgement of individual data packets, ...

  • The manufacture and evaluation of ceramic membranes 

    Ven, Nelke C. Van de (Nelke Cornelia) (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: Inorganic membranes offer numerous advantages, such as stability at high temperatures and a long lifetime. Two Russian professors invented and patented a method for manufacturing a tubular ceramic ...

  • Longshore sediment transport : applied wave power approach, field data analysis and evaluation of formulae 

    Schoonees, Jacobus Stefanus (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: The process of sand being moved parallel to the coast by wave and current action is called longshore (sediment) transport. Knowledge oflongshore transport is essential for the design of breakwaters ...

  • Longbeach Mall : traffic impact assessment 

    Bulman, Andrew (Stellenbosch : University of Stellenbosch, 2001-12)
    This Traffic Impact Assessment (TIA) was commissioned in March 1998 as a supporting document to an application for the rezoning of an ert in Noordhoek from general housing to commercial use. The proposal at the time was ...

  • Liquid petroleum gas as automotive fuel in South Africa 

    Van der Ham, Gert A. (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: The trends in worldwide fuel consumption and availability were studied, these indicated a bigger growth in gaseous fuel use than that of crude oil over the last decade. The economics (cost of converting ...

  • Investigating cable transfer impedance and layout for microsatellite applications 

    Doyi, Silulami J. (Silulami Julius) (Stellenbosch : Stellenbosch University, 2001-12)
    ENGLISH ABSTRACT: The co-existence of electronic devices and their attached transmission cables requires a careful planning regarding the energy leakage across cable shields. This leakage poses potential serious problems ...