Most of our coal is low quality with a low heat value and a high ash content. Eskom relies on coal fired power stations to produce approximately 90% of its electricity. Eskom uses over 90 million tons of coal per annum. Coal mining in South Africa is relatively cheap compared to the rest of the world.
Where does coal come from in South Africa?
South Africa’s coal resources are contained in the Ecca deposits, a stratum of the Karoo Supergroup, and date from the Permian period between 280 and 250 Ma. In general terms, they are largely located in the north-eastern quarter of the country.
How does Eskom generate electricity from coal?
Electricity from coal
In most modern power stations in South Africa, coal is burned to heat water and convert it into steam. The steam is directed onto the blades of a turbine to make it rotate. This in turn rotates the magnetic rotor inside the coil to generate electricity.
How much of South Africa’s electricity is generated by coal?
Does Eskom have enough coal?
Eskom’s Mantshantsha said the utility had “adequate coal stockpiles. An average 50 day’s worth of supply” at each power station. … And with power demand certain to plummet, the company’s stockpiles will probably last longer than the current 50-day average in stockpiles.
What is the most important use of coal in South Africa?
South Africa’s indigenous energy resource base is dominated by coal. Internationally, coal is the most widely used primary fuel, accounting for about 36 percent of the total fuel consumption of the world’s electricity production. About 77 percent of South Africa’s primary energy needs are provided by coal.
Which is the biggest coal mine in South Africa?
The Mafube Colliery is currently the largest coal mining project in South Africa:
- produces 1.1 million tons of coal per year.
- supplies the Arnot Power Station in Mpumalanga.
- worth ZAR 16 billion over its lifespan.
How many years will coal last?
Based on U.S. coal production in 2019, of about 0.706 billion short tons, the recoverable coal reserves would last about 357 years, and recoverable reserves at producing mines would last about 20 years.
How much does Eskom pay for coal?
On average the quality of coal Eskom is buying from the 16 contracted companies is 20.45 gigajoules per kilogram — with an average cost of R409 per tonne. If Eskom paid this average for the 70-million tonnes, it would pay R28-billion.
How much coal does South Africa have left?
South Africa’s coal reserves are estimated at 53 billion tonnes, and with our present production rate there should be almost 200 years of coal supply left.
Does South Africa rely on other countries for electricity?
South Africa exports electricity to seven countries in Southern Africa. On the list, we have Zimbabwe, Lesotho, eSwatini, Namibia, Botswana. Mozambique and Zambia. Wilkinson says that Zimbabwe is not only importing electricity from South Africa but from the Democratic Republic of Congo and Mozambique.
What percentage of electricity comes from coal?
Which countries does South Africa supply with electricity?
Most of this electricity is consumed domestically, but around 12,000 gigawatt-hours are annually exported to Swaziland, Botswana, Mozambique, Lesotho, Namibia, Zambia, Zimbabwe and other Southern African Development Community countries participating in the Southern African Power Pool.
What grade coal does Eskom use?
South African power stations generally use low-grade coal for steam production. Eskom has succeeded at many of its power stations, specifically at Lethabo, to use coal which is of a very low grade, a Calorific Value of 15-16Mj/kg also with a very high ash content, ±42%.
How is electricity made from coal?
Coal-fired plants produce electricity by burning coal in a boiler to produce steam. The steam produced, under tremendous pressure, flows into a turbine, which spins a generator to create electricity. The steam is then cooled, condensed back into water and returned to the boiler to start the process over.
Is there a shortage of coal?
No. Coal is present under 458,600 square miles of the United States, about 13 percent of the country’s land area. It is estimated that the United States has about 35 percent of the world’s potentially minable coal reserves, the largest of any nation. …