Browsing Faculty of Engineering by Title
Now showing items 300-319 of 1123
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Effect of reactor vessel cooling insulation and reflector heat pipes on the temperatures of a pebble-bed reactor using a system CFD approach
(Elsevier, 2020)This study investigates firstly, the effects of varying insulation thickness and flow path width between the core barrel and RCCS-concrete pressure vessel of an upward-flow helium-cooled pebble bed HTGR. The effects on ... -
The effect of real network phase disturbances on the calculation of IEC 61000-4-30 parameters
(IEEE, 2014)Real life network dynamic phenomena are used to demonstrate how the calculation of IEC 61000-4-30 parameters can be affected. The voltage frequency can change instantaneously at a point in the network due to a shift in the ... -
Effect of relative humidity and temperature on the mechanical properties of PFSA Nafion™-cation-exchanged membranes for electrochemical applications
(ESG, 2017)Perfluorosulfonic acid (PFSA) polymer membranes, also known as PEM (proton - exchange membranes), such as Nafion ™ are widely used as electrolyte thin films in electrochemical hydrogen energy ... -
Effect of Saccharomyces cerevisiae and Zymomonas mobilis on the co-fermentation of sweet sorghum bagasse hydrolysates pretreated under varying conditions
(Elsevier, 2014)Hydrolysates from sweet sorghum bagasse pretreatment normally contains hexose and pentose sugars, and this complex mixture of sugars presents a challenge for a single microorganism to effectively ferment all sugars to ... -
Effect of sodium compounds on the sintering propensity of coal-associated minerals
(Elsevier, 2015)This study focused on the chemistry involved in sintering of coal-associated minerals during combustion and inert conditions. Changes in mechanical strength were recorded with compressive strength measurements. This method ... -
Effect of temperature and cathode material on power production in an earthenware microbial fuel cell
(EARET, 2018)This study investigates the performance of microbial fuel cells (MFCs) fed with municipal sewage water considering parameters such as temperature and cathode materials. Single chamber ceramic MFCs with the cathode exposed ... -
Effect of temperature on the performance of Rheofloc: conductivity removal from RO-reject
(EARET, 2018)South Africa is an arid country with an annual average rainfall less than half of the world’s average rainfall. The industrial sector uses 11% of this limited amount of water. Eskom is one of these users. Within the ... -
The effect of the roof and floor geological structures on the mineralogical composition of ash produced from coal at UCG operating temperatures
(International Pittsburgh Coal Conference, 2017) -
The effect of thermal drying on the mechanical strength of South African coal
(SAIMM (The South African Institute of Mining and Metallurgy), 2008) -
Effectivity of phenol during solvent extraction of a South African bituminous coal under mild conditions
(ACS, 2017)Solvent extraction of a South African bituminous coal was carried out under mild conditions (<400 °C) with a holding time of 20 min and an initial nitrogen (N2) pressure of 6 MPa. Thermal degradation of coal with phenol ... -
Effects of application type on the choice of interaction modality in IVR systems
(Unisa Press, 2012)This paper addresses the feasibility of using the telephone as a tool for information access in the technology challenged and illiterate communities of Southern Africa. We did two case studies of disparate Interactive Voice ... -
The effects of bismuth and tin on the mechanochemical processing of aluminum-based composites for hydrogen generation purposes
(Elsevier, 2019)The work described in this paper forms part of a study on the mechanochemical processing of Al with dissimilar metals for hydrogen generation purposes. Here, in an effort to contain the cost of the activation of Al, we ... -
The effects of pore widening and calcination on anodized aluminum oxide prepared from Al6082
(Elsevier, 2020)In this study, semi-organized anodized aluminum oxide (AAO) is prepared by two-step anodization in oxalic acid using a low-purity aluminum (Al) alloy (Al6082) as the source material. Obtaining ideally ordered AAO layers ... -
Efficiency analysis of a three-phase power transformer
(EE Publishers, 2014)Metal, chemical, cement, concrete automobile, mining and other industries struggle to increase the efficiency of the energy they use. Three-phase power transformers play significant role in terms of energy saving, so one ... -
Efficiency analysis of a three-phase power transformer
(Crown Publications, 2015)Transformers are key elements in the industrial processes into which they are integrated. Reliability is crucial to ensure uninterrupted power supply to motors, furnaces and smelters used in a wide variety of applications ... -
Efficiency analysis of an induction motor with direct torque and flux control at a hot rolling mill
(Energy Research Centre, University of Cape Town, 2015)This paper presents an efficiency analysis of an induction motor with direct torque and flux control at a hot rolling mill in South Africa. Two scenarios were evaluated: 1) where the induction motor was controlled at ... -
Efficiency analysis of an induction motor with field oriented control at a hot rolling mill
(Academic Journals, 2012)In this paper, the efficiency analysis of an induction motor with field-oriented control (FOC) at a hot rolling mill in South Africa is presented. It is shown that the energy consumption of an induction motor at a hot ... -
Efficiency and cost analysis of a designed in-line water heating system compared to a conventional water heating system in South Africa
(ERC (Energy Research Centre), 2012)In this paper, the authors compares the efficiency and cost of a designed in-line water heating system with a conventional water heating system (geyser) in South Africa. The paper provides an overview on water heating ... -
Efficiency measurements in IVR systems for oral users: Consequences of differences in educational levels
(South African Inst. for Computer Scientists and Information Technologists Conf. (SAICSIT), 2011)In this paper we present the development of an Interactive Voice Response (IVR) system that enables its users to obtain soccer results. The objective of the study is to evaluate the usability of the system through experiments ... -
Efficient data selection for ASR
(Language Resources and Evaluation, 2015)Automatic speech recognition (ASR) technology has matured over the past few decades and has made significant impacts in a variety of fields, from assistive technologies to commercial products. However, ASR system development ...