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%.
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 main 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.
Can coal be used for electricity?
Coal is used primarily in the United States to generate electricity. In fact, it is burned in power plants to produce more than half of the electricity we use.
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 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.
What are 4 types of coal?
Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite. The ranking depends on the types and amounts of carbon the coal contains and on the amount of heat energy the coal can produce.
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.
Why is coal bad for you?
Coal impacts: air pollution
They include mercury, lead, sulfur dioxide, nitrogen oxides, particulates, and various other heavy metals. Health impacts can range from asthma and breathing difficulties, to brain damage, heart problems, cancer, neurological disorders, and premature death.
What are the disadvantages of coal?
The major disadvantage of coal is its negative impact on the environment. Coal-burning energy plants are a major source of air pollution and greenhouse gas emissions. In addition to carbon monoxide and heavy metals like mercury, the use of coal releases sulfur dioxide, a harmful substance linked to acid rain.
What percentage of electricity comes from coal?
What is coal used for in 2020?
Coal has many important uses worldwide. The most significant uses of coal are in electricity generation, steel production, cement manufacturing and as a liquid fuel. Different types of coal have different uses. Steam coal – also known as thermal coal – is mainly used in power generation.
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.
Where does Eskom get their coal from?
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.
How much does Eskom owe?
As of January 2020 South African municipalities owe Eskom a total of roughly R43 billion (equivalent to US$2.88 billion).