Author:Meyers, Bronwyn C; Grobler, Jan-Hendrik; Snedden, GCDate:Jul 2023A combustor was designed for a 200N micro-gas turbine [1, 2] using the NREC preliminary combustor design method [1, 2, 3]. During the design process, there are various aspects where there are no definitive methodologies for specifying the ...Read more
Author:Pratt, Lawrence E; Matheus, Jana; Klein, RDate:Dec 2023Electroluminescence (EL) images enable defect detection in solar photovoltaic (PV) modules that are otherwise invisible to the naked eye, much the same way an x-ray enables a doctor to detect cracks and fractures in bones. This paper presents ...Read morecbnd
Author:Roos, Thomas HDate:Oct 2021The decarbonisation of hard-to-abate sectors globally will require significant volumes of carbon-free hydrogen. An investigation has been performed to determine the cost at which hydrogen can be generated by electrolysis using renewable ...Read more
Author:Zandamela, Frank; Ratshidaho, Terence; Nicolls, F; Stoltz, George GDate:Nov 2022Deep learning has gained traction due its supremacy in terms of accuracy and ability to automatically learn features from input data. However, deep learning algorithms can sometimes be flawed due to many factors such as training dataset, ...Read more
Author:Pratt, Lawrence E; Govender, Devashen; Klein, RDate:Nov 2021Electroluminescence (EL) images enable defect detection in solar photovoltaic (PV) modules that are otherwise invisible to the naked eye, much the same way an x-ray enables a doctor to detect cracks and fractures in bones. The prevalence of ...Read more
Author:Sheik, Muhammed; Klein, Peter; Segakweng, TshiamoDate:Nov 2021Solar energy supply does not always match demand and it is therefore necessary to investigate efficient ways of storing thermal energy. Sorption based thermochemical heat storage provides high energy densities as well as an exceptional advantage ...Read more
Author:Sheik, Muhammed; Segakweng, Tshiamo; Sekhuthe, Karabelo LDate:Nov 2023The Department of Mineral Resources and Energy estimates that the industrial sector is the largest consumer of energy in South Africa. Approximately 66% of energy end-use in industry is for heat generation during manufacturing. South African ...Read more
Author:Mkasi, Hlaluku W; Lawrence, Pratt; Ayanna, Manjunath B; Roro, Kittessa TDate:Nov 2021The high demand for low carbon energy and rapidly decreasing solar panel prices have led to a surge in solar photovoltaic (PV) plants across the globe, more than at any other time since the industry began. Combined with geographic variations ...Read more
Author:May, Siyasanga I; Pratt, Lawrence E; Roro, Kittessa T; Bokoro, PDate:Aug 2022This work focuses on modelling the power output of multiple PV technologies installed at the outdoor test facility of the Council for Scientific and Industrial Research (CSIR) in Pretoria. Extreme Gradient Boosting (XGB) and Artificial Neural ...Read more
Author:Kleebauer, M; Marz, Christopher A; Reudenbach, C; Braun, MDate:Dec 2023In the realm of solar photovoltaic system image segmentation, existing deep learning networks focus almost exclusively on single image sources both in terms of sensors used and image resolution. This often prevents the wide deployment of such ...Read more
Author:Meyers, Bronwyn C; Grobler, Jan-Hendrik; Snedden, GCDate:Sep 2022A combustor was designed for a 200N micro-gas turbine for the model aircraft industry using the NREC design method. Multiple designs resulted which varied in terms of annular area split configuration, hole area splits and relative hole ...Read more
Author:May, Siyasanga I; Pratt, Lawrence E; Roro, Kittessa T; Bokoro, PDate:Nov 2021This work focuses on developing prediction models for the power output of multiple PV technologies installed at the outdoor test facility on the Pretoria campus of the Council for Scientific and Industrial Research. Random Forest (RF) and ...Read more
Author:Basappa Ayanna, Manjunath; Pratt, Lawrence E; Roro, Kittessa TDate:Nov 2021A commercial 3ph 25 kW inverter is characterised at the Smart Grid Laboratory, CEA-INES in accordance with IEC/EN 61727 and EN50530. The minimum, nominal and maximum power point tracking power conversion efficiency for normalized power levels ...Read more
Author:Maweza, Elijah L; Pratt, Lawrence E; Roro, Kittessa TDate:Nov 2021The high demand for low carbon energy and rapidly decreasing solar panel prices have led to a surge in solar photovoltaic (PV) plants across the globe, more than at any other time since the industry began. Combined with geographic variations ...Read more
Author:Pierce, Warrick T; Ferreira, Bianca ADate:Apr 2022Summary of 2021 statistics: Coal still dominates and provides about 80% of electricity generated, record high diesel usage, and renewables (excluding hydro) accounted for 6.7%.Read more
Author:Ferreira, Bianca A; Pierce, Warrick TDate:Apr 2022This presentation discusses the statistics derived from utility-scale power generation in
South Africa in 2021.Read more
Author:Klein, Peter; Potgieter, M; Ferreira, Bianca ADate:Aug 2021Dynamic thermo-fluid models of fire-tube steam boilers can be used to optimise the design and operation of equipment, resulting in possible energy and emissions savings. This work presents the development of a dynamic boiler model of a 4-pass ...Read more