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Browsing Faculty of Engineering@PUK by Title

Now showing items 34-53 of 88

Identifying opportunities for deterministic network coding in wireless mesh networks

Grobler, Magdalena Johanna; Helberg, Albertus Stephanus Jacobus (SAIEE Publishers, 2011)

Recent advances in methods to improve network utilisation has lead to the introduction of Network Coding, a technique that can reduce local congestion in a network by combining information sent over the network. In this ...
The IGY and beyond: A brief history of ground-based cosmic-ray detectors

Stoker, Pieter (Elsevier, 2009)

The state of art of ground-based cosmic-ray research from its discovery to present is reviewed. After discovery of cosmic rays by Hess in 1912, the nature of the primary and secondary radiation was established from recordings ...
Impact of frequency switching on the efficiency of a fully suspended active magnetic bearing system

Gouws, Rupert (Academic journals, 2012)

Due to the rising energy (and electricity) cost it is essential that an active magnetic bearing (AMB) system is operated as efficiently as possible. Frequency switching caused by an external source can cause an AMB system ...
Influence of chemical pretreatment on the internal structure and reactivity of Pyrolysis chars produced from sugar cane bagasse

Carrier, Marion; Knoetze, Johannes; Neomagus, Hendrik Willem Johannes P; Görgens, Johann (American Chemical Society, 2012)

The characterization of char obtained from the vacuum pyrolysis (8 kPaabs, 460 °C, 18 °C/min) of sugar cane bagasse followed by steam gasification (60 wt % of steam, 700−900 °C) was studied. The influence of different ...
The influence of the degree of cross-linking on the absorption properties of chitosan beads

Neomagus, Hein W J P; Van der Gun, Marius A; Osifo, Peter O; Webster, Athena; van der Merwe, Hein; Grant, David M (Elsevier Science Limited, 2008)
An integral CFD approach for the thermal simulation of the PBMR reactor unit

Kleingeld, Marius; Janse van Rensburg, Jacobus Johannes (Elsevier, 2011)

A CFD method was developed to conduct integral thermal reactor analysis for the complete Reactor Unit of the Pebble Bed Modular Reactor (Pty) Ltd (PBMR). The requirement was however also to include very detailed aspects ...
An integrated self-sensing approach for active magnetic bearings

Ranft, Eugen Otto; Van Schoor, George; Du Rand, Carel Petrus (SAIEE Publications, 2011)

Self-sensing permits active magnetic bearings (AMBs) to consolidate the actuation and sensing functions into a single electromagnetic transducer. Eliminating the position sensing device as well as interfacing reduce potential ...
Integrating innovation skills in an introductory engineering design-build course

Liebenberg, Leon; Mathews, Edward Henry (Spring, 2010)
Introduction to the PBMR heat transfer test facility

van Staden, M (Elsevier Science Limited, 2008)
Investigating leakage and bypass flows in an HTR using a CFD methodology

Kleingeld, Marius; Janse van Rensburg, Jacobus Johannes (Elsevier, 2011)

An area that has been identified as significantly important in the development of a high temperature reactor (HTR) is the prediction of leakage and bypass flows. It is therefore essential to understand the influence of ...
Investigation of lump coal agglomeration in a non-pressurized reactor

Bunt, John Reginald; Campbell, Quentin Peter; De Waal, F (Elsevier, 2010)
A kinetic expression for the pyrolytic decomposition of polyterafluoroethylene

Bruinsma, Odolphus S L; Neomagus, Hendrik W J P; Van der Walt, I J; Nel, J T; Crouse, P L (Elsevier Science Limited, 2008)
LTI modelling of active magnetic bearings by means of system identification

Van Schoor, George; Van Vuuren, Pieter Andries; Venter, Willem Christiaan (SAIEE Publications, 2011)

A relatively unknown phenomenon in active magnetic bearings (AMBs) is that the frequency content of their rotor position signal can induce nonlinear behaviour in the bearings. The existence of such frequency-induced nonlinear ...
Manipulation of gasification coal feed in order to increase the ash fusion temperature of the coal enabling the gasifiers to operate at higher temperatures

Waanders, Frans B; Van Dyk, J C (Elsevier Science Limited, 2007)
Manipulation of the ash flow temperature and viscosity of a carbonaceous Sasol waste stream

Waanders, Frans Boudewijn (Elsevier, 2010)
Measurement and verification of a lighting load reduction project through energy efficiency

Van Der Merwe, Christoffel; Masopoga, Idah; Grobler, Louis J (2009)

This paper will describe the methodology and procedures that were followed to measure and verify the impact on the electricity use of a lighting load reduction project implemented at a gold mine. The lighting retrofit ...
Modeling the flow and heat transfer in a packed bed high temperature gas-cooled reactor in the context of a systems CFD approach

Du Toit, C.G.; Rousseau, P.G. (ASME (American Society of Mechanical Engineers), 2012)

ABSTRACT Engineers are faced with two major challenges when carrying out the thermal-fluid design of a complex system consisting of many interacting components. The first challenge is to predict the performance of all the ...
Modified earliest decoding in networks that implement random linear network coding

Helberg, Albertus Stephanus Jacobus; Von, Solms Sun? (2012)
Multiple frequency fault detection, correction and identification of vibration forces on the rotor of a rotational active magnetic bearing system

Van Schoor, George; Gouws, Rupert (School of Electrical, Electronic and Computer Engineering, North-West University, 2009)
Multivariable H∞ or Centre of gravity PD control for an active magnetic bearing flywheel system

Steyn, Stephanus Jacobus Marais; Van Schoor, George; Van Vuuren, Pieter Andries (SAIEE Publications, 2011)

A state-space model with uncertainties for an active magnetic bearing energy storage flywheel system (Fly-UPS) is developed. A multivariable robust H∞ controller for the Fly-UPS is then synthesised. Different weighting ...