South Africa is a signatory to the Paris (COP21) Agreement 2016 – which aims to reduce global warming through each country’s actions – explains Dr Rebecca Maserumule, Chief Director: Hydrogen and Energy at the National Department of Science and Technology (DST). In her presentation, she notes that South Africa’s guiding frameworks include:
Research focus areas include clean coal technologies, nuclear energy, renewable energy (eg solar, biofuels, and wind), energy efficiency and energy demand management, and hydrogen and fuel cells research. In most cases, says Dr Maserumule, the research has been in place for over a decade through partnerships with key research institutions.
One of the ways to understand sustainable energy is to look at its impacts in various areas. Prof Sanette Marx, DST/National Research Foundation Research (NRF) Chair in Biofuels at North West University, considers three areas: environmental impact, economic impact, and social impact. We can consider something sustainable when it’s equitable, viable, and socially and environmentally acceptable.
Prof Roula Inglesi-Lotz, Associate Professor from the University of Pretoria, questions whether energy poverty is only lack of access? Energy poverty impacts not only on lighting – consider heating, cooking, and communications. Access to the latter has a knock-on effect because it affects knowledge transfer such as with internet access.
She presents the following definition: “…the absence of sufficient choice in accessing adequate, affordable, reliable, high-quality, safe and environmentally benign energy services to support economic and human development” (Reddy, 2000). She notes that the definition acknowledges the absence of choice and the role of affordable and adequate technology.
SA continues to innovate in the renewable energy space. Take the work done by IDEAS – the Institute for the Development of Energy for African Sustainability – at Unisa.
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Prof Diane Hildebrandt, Director of IDEAS, explains that they have developed small-scale anaerobic biodigesters. These are basically large double-walled bags where you feed in organic waste and slurry comes out on the other end. The slurry overflow has no smell and can be used as a fertiliser. The biodigesters produce biogas while removing pathogens from waste (with consequent reduced health risks). IDEAS is developing a business case to show employment benefits, as well as cost reduction for immediate users and the municipality.
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Over the past few years, there has been a lot of debate around drilling for shale gas and its environmental impact. Research from the DST-NRF Centre of Excellence in Integrated Mineral and Energy Resource Analysis (CIMERA), University of Johannesburg, looks at ‘Questioning the existence of an economic producible shale gas resource in the southern Main Karoo Basin based on results of the CIMERA-Karin drilling project’.
One of the aims was to establish the maturity and shale gas potential by direct measurements of gas content. Prof Nicolas Beukes explains that nothing like this had been done before. Everything previously had been speculation including shale gas estimates.
After the CIMERA-KARIN Drilling Project with the first true gas measurements, very little to no gas was detected. The conclusion is that shale gas potential looks to be much lower than initially estimated. There are some provisos, such as the project not specifically targeting ‘sweet spots’.
Prof Beukes explains that we need to do the science first. We need to answer the question of whether South Africa actually has an economically viable shale gas resource. This will avoid unnecessary environmental concerns and legal battles.
The CSIR Energy Centre has been developing models for SA’s energy mix. Currently, energy is coal dominated with end use being 25% transport, 25% electricity and 50% heating and cooling.
CSIR’s Mr Jarrad Wright explains that globally there have been significant cost reductions in renewable energy. Solar PV technology and wind technology, for example, have now become cost competitive. Focusing on electricity, Wright showed that – whether there is a high or low demand forecast for South Africa – there is a gap. This needs to be filled in the least-cost manner and with a reliable and flexible energy supply.
Three scenarios were presented:
Speakers that addressed the forum can be contacted through the spokesperson, Ms Jansie Niehaus.
Video clips with the full presentations and discussion can be found on the NSTF web site.
The National Science and Technology Forum (NSTF), established in 1995, is a broadly-representative stakeholder body for all SET and innovation organisations in South Africa, which seeks to influence policy formulation and delivery. The NSTF Awards are unique in SA, recognising the outstanding contributions of individuals and groups to SET and innovation. The science bursaries page http://www.nstf.org.za/bursary/ provides information on bursaries and bursary providers for science, engineering and related studies. |
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Publish date: 2018-05-09 00:00:00.0