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Browsing Research Articles (University of Pretoria) by UP Author "Lalk, Jorg"

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A case study of climate variability effects on wind resources in South Africa

Herbst, Lynette; Lalk, Jorg (The Research Energy Centre of the University of Cape Town, 2014-08)

The wind energy sector is one of the most prominent sectors of the renewable energy industry. However, its dependence on meteorological factors subjects it to climate change. Studies analysing the impact of climate ...
Power losses of 2 G HTS coils measured in external magnetic DC and ripple fields

Chudy, Michal; Chen, Yiran; Zhang, Min; Baghdadi, Mehdi; Lalk, Jorg; Pretorius, Tinus; Coombs, Tim (IEEE / Institute of Electrical and Electronics Engineers Incorporated, 2014-02)

Power losses are an important phenomenon in 2nd type superconductors. Precise evaluation of power losses in superconducting coils is crucial for the design of novel machines such as superconducting motors or generators. ...
Review of proposals for practical power sector restructuring and reforms in a dynamic electricity supply industry

Khan, Muhammad T.; Thopil, George Alex; Lalk, Jorg (Elsevier, 2016-09)

South Africa’s electricity supply industry (ESI) remains a vertically-integrated monopoly despite global trends towards restructuring. The monopolistic nature of the ESI could hinder the development of distributed power ...
Techno-economic performance comparison of crystalline and thin film PV panels under varying meteorological conditions : a high solar resource southern hemisphere case

Thopil, George Alex; Sachse, Christiaan Eddie; Lalk, Jorg; Thopil, Miriam Sara (Elsevier, 2020-10)

Photovoltaic panel technologies have evolved considerably over a limited period. The most popular PV panel technologies can be divided into two main groups, the first being crystalline technologies and second, thin film ...
Wind energy development in sub-Saharan Africa : application of the SATSA framework

Ameen, A.M.; Lalk, Jorg (Southern African Institute for Industrial Engineering, 2019-08-30)

There is a need for a framework that can be applied to wind energy developments in the sub-Saharan African (SSA) context that will facilitate technology-sustainable assessments to promote wind energy. This paper applies ...

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Browsing Research Articles (University of Pretoria) by UP Author "Lalk, Jorg"

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