Browsing Faculty of Engineering by Issue Date
Now showing items 21-40 of 1116
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An understanding of the behaviour of a number of element phases impacting on a commercial-scale Sasol-Lurgi FBDB gasifier
(Elsevier, 2008)Chemical properties of coal which impact on gasification performance relate to those processes which do effect a change in chemical constitution, these in turn may lead to changes in physical properties such as particle ... -
A study of the effect of MPLS on Quality of Service in Wireless LANS
(OPNET Technologies, 2008) -
The continuous depolymerization of filled polytetrafluoroethylene with a continuous process
(Wiley, 2008)A new method for beneficiating unfilled as well as filled polytetrafluoroethylene (PTFE) waste has been developed. This process does not use any carrier gas while forming the depolymerization products. It enables polymer ... -
Introduction to the PBMR heat transfer test facility
(Elsevier, 2008)This paper provides an introduction to the Heat Transfer Test Facility (HTTF) that is currently being developed for PBMR (Pty.) Ltd. by M-Tech Industrial (Pty.) Ltd. in association with North-West University in South Africa. ... -
Radial variation in porosity in annular packed beds
(Elsevier, 2008)This paper describes the results of a study of the variation in the radial direction in the porosity of annular packed beds. A comparison is made between the predictions by a number of empirical correlations found in ... -
Quantification of oxygen capture in mineral matter during gasification
(Elsevier, 2008)It has been observed that during the transformation of minerals at higher temperatures (>1000 °C), mineral species are formed containing a high number of oxygen molecules, i.e. gehlenite (Ca2Al2SiO7), mullite (Al6Si3O15), ... -
A new and innovative look at anti-insulation behaviour in building energy consumption
(Elsevier Science Limited, 2008) -
Evaluation of a detailed radiation heat tranfer model in a high temperature reactor systems simulation model
(Elsevier, 2008)Radiation heat transfer is a major mode of heat transfer in high temperature gas-cooled reactors (HTRs) because of the high operating temperatures. It is, however, a difficult phenomenon to calculate in full detail due to ... -
Trace element behaviour in the Sasol-Lurgi MK IV FBDB gasifier. Part 1. The volatile elements: Hg, As, Se, Cd and Pb
(Elsevier, 2008)Coal-fired power and heat production are the largest single source of Hg in the atmosphere, and in March 2005, the US-EPA ruled regarding Hg reduction from coal utilization in the USA. Appropriate Hg pollution control of ... -
Properties of high ash char particles derived from inertinite-rich coal. 1. Chemical, structural and petrographic characteristics
(Elsevier Science limited, 2008) -
Identification of the reaction zones occurring in a commercial-scale Sasol-Lurgie FBDB gasifier
(Elsevier, 2008)Gasification behaviour is particle dependent, whilst gasifier (reactor) behaviour is an averaging process of individual responses of each particle. It was hypothesized, that if it were possible to extract and analyze ... -
The influence of the degree of cross-linking on the absorption properties of chitosan beads
(Elsevier Science Limited, 2008) -
The application of system CFD to the design and optimization of high-temperature gas-cooled nuclear power plants
(ASME, 2008)The objective of this paper is to model the steady-state and dynamic operation of a pebble-bed-type high temperature gas-cooled reactor power plant using a system computational fluid dynamics (CFD) approach. System CFD ... -
A new approach to ensure successful implementation of sustainable demand side management (DSM) in South African mines
(Elsevier, 2008)Demand side management (DSM) is seen as a short-term solution to the imminent problem of electricity supply shortages in South Africa. DSM aims to reduce peak loads with immediate results in a short time. The mining sector ... -
A kinetic expression for the pyrolytic decomposition of polyterafluoroethylene
(Elsevier, 2008)Despite the fact that the thermal decomposition of polytetrafluoroethylene has been extensively studied over the past six decades, some inconsistencies regarding the kinetic parameters, e.g. the order of the reaction, ... -
Regenerator for Varshamov-tenengolts-like synchronisation error correcting codes
(IEEE, 2008)Synchronisation errors, that is, the insertion of additional or deletion of valid symbols, are the most difficult class of errors to correct - containing the class of additive errors as a subset. A regenerating algorithm, ... -
Efficient packet erasure decoding by transforming the systematic generator matrix of an RS code
(IEEE, 2008)We consider the erasures-only decoding of Reed-Solomon codes. One class of erasure decoders of algebraic codes can be viewed as a transformation of the systematic generator matrix, as first noticed by Berlekamp. We extend ... -
Analysis of waveforms in modern power systems
(Wiley, 2008)This chapter contains sections titled: Frequency Analysis of Non-Sinusoidal Waveforms: Practical Considerations; Analog-to-Digital Conversion; Sequence Component Analysis; IEEE 1459: Power Definitions for modern Power ... -
Improving QoS for real-time multimedia traffic in ad-hoc networks with delay aware multi-path routing
(IEEE, 2008)A Mobile Ad-hoc Network (MANET) is a wireless network in which nodes, in the absence of fixed access points, communicate via single or multi-hop paths. Each node in a MANET should thus be able to perform necessary routing ... -
The effect of thermal drying on the mechanical strength of South African coal
(SAIMM (The South African Institute of Mining and Metallurgy), 2008)