The effect of light intensity and reactor configuration on Rhodopseudomonas palustris growth and hydrogen production by Ross, Brandon Sean

Get full text

An estimation of the performance of spark ignition methanol engines by Yates, Andrew David Bennett

Get full text

Development of a multilevel converter topology for transformer-less connection of renewable energy systems by Ajayi-Obe, Akinola Ayodeji

“…Hence, the proposed converter topology presents a single-stage power conversion configuration. Efficiency analysis of the proposed converter topology has been studied and compared to the intermediate and grid-side converter topology of a three-stage power converter configuration. …”
Get full text

Investigation of alternative carbon sources for the biological treatment of synthetic sulphate-laden water and mine impacted water in a linear flow channel reactor by Tawodzera, Nyasha

“…Based on superior stability and conversion efficiency, the fed-batch reactor was selected for carbon source testing. …”
Get full text

An investigation into the adaptive re-use of commercial buildings in satisfying the demand for residential in the central business district of Cape Town, South Africa, an emerging... by Russell, Michael

“…The ability to sustainably reuse existing commercial structures thus becomes a pertinent topic in providing an efficient solution to satisfy the housing demand. Some 9000m2 of office space is currently earmarked for residential conversion in Cape Town as demand for central residential property grows and a low interest rate economic environment creates good financial conditions for developers. …”
Get full text

A 3-phase Z-source inverter driven by a novel hybrid switching algorithm by Malengret, Jean-Claude

“…A novel DSP control algorithm allows the inverter toachieve the following:· Run Space Vector Pulse Width Modulation (SV-PWM) for maximum DCbus voltage utilization while boosting the DC bus during zero space vectorstates using shoot through.· Seamless transition between modulation control and modulation / shootthrough control.· Optimised efficiency and DC bus utilisation using Hybrid Space VectorBoost Pulse Width Modulation (HSVB PWM) which is unique to thisdissertation.Such a system is particularly suited to fuel cell and particularly wind turbineapplications where the DC bus voltage is varies over a wide range resulting inthe need for a DC to DC buck/boost to regulate the DC bus to maintain a steady3-phase sinusoidal output. …”
Get full text

Comparing the performance of different catalyst packings for Fischer-Tropsch synthesis by Mhinga, Masana

“…The increase in global population accompanied by depleting fossil fuel reserves and rising fuel demand is prompting the need to increase and diversify fuel production rates. …”
Get full text

Optimisation of a linear flow channel reactor for semi-passive, simultaneous biological sulphate reduction and partial sulphide oxidation by Fernandes, Sarah

“…It was concluded that a more diverse inoculum was needed to investigate the potential of propionate more fully. …”
Get full text

An Emission and Discard Priority Scheme for Optical Burst Switched Networks by Acquaah_PEK

“…In this thesis, I describe several critical issues that affect OBS networks. I highlight the need to resolve contention efficiently and cost-effectively to improve QoS in OBS networks. …”
Get full text

Silicon nano wires solar cell by Mohamed, Sara

“…Improving the optical absorption capability of solar cells' materials is a crucial factor in increasing their power conversion efficiency. To this end, the absorption can be enhanced by minimizing the reflection and the transmission out from the absorbing layer. …”
Get full text
Get full text

Impedance spectroscopy techniques for condition monitoring of polymer electrolyte membrane fuel cells by Aroge, Fabusuyi Akindele

“…Given the promises of the fuel cell however, research efforts continue to increase to further improve its viability as an energy source competitive enough to meet mankind’s need of clean energy. This work presents results bordering on efficient diagnostic approaches for the fuel cell, aimed at improving the durability of the fuel cell. …”
Get full text

Synthesis of modified hydrocalumite : a novel katoite/portlandite precursor method

Get full text

AI-based hybrid optimisation of multi-megawatt scale permanent magnet synchronous generators for offshore wind energy capture by Lilla, Abdurahman Daleel

“…For the much wider adoption of wind power generation, the cost of energy (price/MWh) needs to be driven down further, by the development of more efficient and cost-effective ways to harvest the vast amounts of energy. …”
Get full text

Development of a Kinetic Model for Low Temperature Fischer-Tropsch Synthesis by Davies, Imaad

“…Globally, there is a need to replace our dependence on fossil fuels as the main source of energy. …”
Get full text

Production performance & health of Lohmann Brown layer hens that received guanidinoacetic acid as a feed supplement

Get full text

Towards tandem bio-chemo catalytic systems for the activation of alkanes and subsequent oxidation of alcohols to aldehydes using biofabricated Pd and Au catalysts by Govender, Mivashya

“…However, due to the low conversion and lowervalue of the alcohol product (Olaofe, 2013), the generation of higher value chemicals is needed to achieve a techno-economically feasible operation. …”
Get full text