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Now showing items 21-30 of 325
The design of a pressure vessel and testing procedures for the determination of the effect of high temperature pressurised helim on valve contact welding
(North-West University, 2004)
The PBMR (Pebble Bed Modular Reactor) is one of the current developments in the field of
nuclear power generators. The control philosophy of the PBMR system relies heavily on the
controlling of valves. The current control ...
The development of a radial active magnetic bearing
(North-West University, 2004)
This dissertation presents the development of a radial active magnetic bearing (AMB). With AMBs
the rotor of a machine can be suspended in the air without any direct contact between the stator and
the rotor. This makes ...
Performance evaluation of GPRS/802.11b mobile-node initiated handover based on signal strength criteria
(North-West University, 2004)
There has been a great concern by cellular providers about the impact Wireless Local Area Network
(WLAN) systems that are based on 802.11b wireless standard pose to mobile business [24]. While
cellular providers are still ...
Object-oriented software development applied to adaptive resolution control in two-fluid models
(North-West University, 2004)
The accuracy of two-phase flow simulations is mainly determined by the mathematical
formulations and resolution of the computational mesh used in the numerical
model. Selective mesh refinement improves the accuracy of ...
Multiple-Input Single-Output system identification techniques using the pebble bed modular reactor data
(North-West University, 2004)
Models are used to describe the dynamic behaviour of a system, to predict future outputs of the system and are useful when designing certain control schemes. An effective control scheme could be used to influence the dynamic ...
Validation of the point kinetic neutronic model of the PBMR
(North-West University, 2007)
This study introduces a new method for the validation of the point kinetic neutronic model of
the PBMR. In this study the diffusion equation solution, as implemented in the TlNTE
PBMR 268 MW reactor model, replaces the ...
Modelling a pebble bed high temperature gas-cooled reactor using a system-CFD approach
(North-West University, 2007)
The objective of this study was the development of a systems-CFD model of the PBMR reactor
that used the minimum number of grid points to achieve grid independence. The number of grid
points is reduced by increasing the ...
The reconciliation of the material balance of a natural gas processing plant
(North-West University, 2006)
Accurate material balances serve as essential tools for controlling, evaluating and optimising petrochemical processes. In natural gas processing plants, where there are only phase separation processes and no chemical ...
Condition monitoring of active magnetic bearing systems
(North-West University, 2007)
In this thesis, the author contextualises condition monitoring of active magnetic bearing (AMB) systems and proposes the real-time condition monitoring of AMB systems. Three real-time fault detection, diagnosis, correction ...
A study of the effect of MPLS on quality of service in wireless LANs
(North-West University, 2006)
The increasing availability of wireless technology, both at home and in the workplace, offers many advantages in terms of mobility and freedom of connectivity. However, switching from a wired to a wireless transmission ...