Photo: Glenn Moncrieff and Planet Labs Inc
This is the new addition to the Kalahari Desert: the 100 megawatt (MW) renewable energy project called the Kathu Solar Park for the Northern Cape Town outside which it is located.
Kathu is a massive 4.5km2 concentrated solar power plant, with the ability to pump electricity into the national grid even when the sun isn't out.
Stunning pictures! The 100 MW Kathu concentrating solar power plant with 4,5 hour molten salt energy storage system was synchronised to the @Eskom_SA grid on 18 Nov 2018. Construction on the CSP began in May 2016, and it is expected to be completed in early 2019. pic.twitter.com/JqGLBgHs59— Chris Yelland (@chrisyelland) November 27, 2018
Its contribution will be enough to supply 179,000 South African homes with stable electricity during peak demand periods.
It uses parabolic trough technology that uses giant curved mirrors to track the sun and focus its rays into a pipe. The pipe contains a heat absorbent medium that carries the energy to water in a boiler. The steam then drives a turbine to generate electricity.
Thanks to a molten-salt storage system, Kathu can store 4.5 hours of thermal energy, which helps reduce the effects of irregular sunlight and allows the opportunity to produce electricity even after the sun goes down.
Kathu is expected to reduce carbon dioxide output by six million tons over a 20-year period after it goes into full commercial operation in 2019.
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