Author Archive for: Engineering News

A new process being pioneered by energy companies such as Israel-based Helios and Netherlands-based Alkalium proposes the use of sodium metal rather than coal or hydrogen to refine iron-ore into direct reduced iron (DRI). Traditionally, iron is beneficiated by mixing iron-ore fines with coal. The iron oxide (Fe2O3), when heated in a furnace, undergoes a chemical transformation whereby the oxygen molecules from the Fe2O3 bind with the carbon molecules in the coal, creating carbon dioxide (CO2) as a by-product and leaving pure iron behind.

Electrical and digital specialist Legrand avers that its track busway system is an efficient and flexible alternative to traditional power distribution systems that lack flexibility in adapting to changes. Legrand states that a reliable and flexible power distribution system is an essential element in the manufacturing, industrial and commercial sectors, where facilities require upgrades to enhance energy efficiency and optimise productivity.

South Africa’s current electricity transmission grid is generally constrained in the Cape provinces and unable to facilitate the connection of new utility-scale generation including that from solar photovoltaic (PV) and wind, says wind and solar energy facility developer JUWI Renewable Energies. Historically, the majority of South Africa’s electricity supply was provided by coal power stations, the majority located in Mpumalanga, with the power transmitted to the major load centres including those in the Cape. The national transmission grid is still set up in this way, despite the introduction of large-scale renewables, as the cost and time to upgrade this infrastructure is onerous.

The combination of public and private procurement of large-scale renewables in South Africa signals increased stability for manufacturers of key components, a new GreenCape report argues. Published ahead of the release of the much-anticipated South African Renewable Energy Masterplan (SAREM), which will outline the country’s official approach to localising renewables value chains, GreenCape’s ‘Large-scale Renewable Energy’ report forecast that there will be about 32 GW of installed renewables capacity in South Africa by 2030.

Johannesburg Water has showcased some of the various reservoirs and systems that supply the City of Johannesburg with water. The water utility also outlined the challenges in operating the systems that feed the economic hub with the critical resource. Natasha Odendaal has the story.