Browsing Engineering by Issue Date
Now showing items 41-60 of 1403
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An investigation into an improved method of dewatering fine coal
(Potchefstroom University for Christian Higher Education, 2003)Dewatering coal, and especially fine coal (-600μm), is a significant problem in the preparation of coal. The final moisture level of fine coal can be anything up to 30% by weight, depending on the type of dewatering equipment ... -
Simulation of heat and momentum transfer in the high temperature test reactor
(North-West University, 2003)The world energy consumption is projected to increase by 60 percent over a 21-year forecast horizon. Using the full potential of the world's uranium and thorium resources, nuclear power can supply a large share of the ... -
A comparative study into the application of the NRS 048, IEEE 519-1992 and IEC 61000-3-2 on harmonic apportioning in a discrimitive tariff
(North-West University, 2003)Development in power electronics enabled sophisticated energy conversion. These new solid-state energy conversion processes are energy-effective, but are inherently non-linear which means that the load current is typically ... -
The use of neural networks to determine the long-term impact of demand side management
(North-West University, 2003)Eskom, South Africa national electricity provider, estimates that in the year 2006 South Africa will experience a capacity shortage. One way to address this problem is through the implementation of Demand-Side Management ... -
Optimising the operation of underground mine refrigeration plants and ventilation fans for minimum electricity cost
(North-West University, 2003)This study describes the development and use of a mathematical model that will enable mine operators to minimise the costs of electricity consumed by the ventilation and refrigeration systems used for environmental control ... -
Physical database design applied in the relational database model
(North-West University, 2003) -
Determination of the kinetic models and associated parameters for the low temperature combustion and gasification of high-ash coal chars
(North-West University, 2003)South Africa has large coal reserves and the power generation industry produces approximately 95% of the electricity from coal. Most of the high-grade coal is exported leaving behind a discard of high ash coal. For the ... -
Thermal-fluid simulation investigation of the reactor cavity cooling system standpipes design for the pebble bed modular reactor
(North-West University, 2003)Pebble Bed Modular Reactors are advanced nuclear reactors and are being developed to possess inherent safety and reliability. This is achieved by utilizing a sequence of passive thermal storage and heat transfer mechanisms, ... -
Mathematical modeling of leakage flow through labyrinth seals
(North-West University, 2003)Optimization of gas turbine systems has identified the need for simplified mathematical models to calculate the losses experienced within turbo machines. One such loss is that of the flow through labyrinth seals. As part ... -
New concepts for managing diabetes mellitus
(North-West University, 2003)Preface - Biotechnology is generally considered to be the wave of the future. To facilitate accurate and rapid development of medication and treatments, it is critical that we are able to simulate the human body. One section ... -
Designing a novel centralised monitoring and control facility
(North-West University, 2003)Privatisation has led to many changes throughout the South African economy. This has led to the development of various new approaches in the different market sectors. Businesses have taken new approaches to optimise their ... -
The application of signal processing and artificial intelligence techniques in the condition monitoring of rotating machinery
(North-West University, 2003)Condition monitoring of critical machinery has many economic benefits. The primary objective is to detect faults, for example on rolling element bearings, at an early stage to take corrective action prior to the catastrophic ... -
Reverse engineering of a centrifugal turbine housing
(North-West University, 2003)The Garrett GT 42 turbine housing is a spheroidal ductile cast iron casting, which according to the ASME B31.3 (1996) Code for Pressure Piping, does not satisfy the Pebble Bed Micro Model (PBMM) design requirements. By ... -
Application of Monte Carlo analysis in the simulation of thermal-fluid network
(North-West University, 2003)Large thermal-fluid network simulations are usually conducted for fixed input steady-state conditions without accounting for statistical variations of these variables. This is not realistic and gives no indication of ... -
Analysis of the porosity variations in a pebble-bed reactor core
(North-West University, 2003)The variation in porosity of a packed column is an important parameter in its design. The flow patterns, mass transfer, heat transfer, and other transfer phenomena are dependent on the porosity variations in the ... -
Separation by pervaporation of methanol from tertiary amyl methyl ether using a polymeric membrane
(Potchefstroom University for Christian Higher Education, 2003)In this study, the sorption and pervaporation characteristics of the commercial PERVAP2256® membrane with methanol and tert-amyt methyl ether (TAME) mixtures were investigated. The feed concentration and the feed temperature ... -
Delay modelling and synchronisation of telecontrol networks
(North-West University, 2004)Eskom, South A6ica's largest supplier of electricity, uses a vast telecommunication network to control and monitor all operations in remote locations such as substations. As Eskom expanded the electricity network across ... -
Numerical simulation of systems of rigid bodies
(North-West University, 2004)This study investigated the various techniques available for rigid body system simulation, thus providing a thorough overview of the latest relevant literature. N became apparent that no engineering level accurate impulsive ... -
Designing a dynamic thermal and energy system simulation scheme for cross industry applications
(North-West University, 2004)The South African economy, which is largely based on heavy industry such as minerals extraction and processing, is by nature very energy intensive. Based on the abundance of coal resources, electricity in South Africa ... -
Development of an ultra-high radio-frequency identification system
(North-West University, 2004)Ultra-high radio-frequency identification (UHF RFID) systems outperform all other RFID technologies in terms of throughput and reading range. UHF RFID tags and readers will be deployed on unprecedented scales during ...