Khi Solar One
Abengoa claim it is the first thermal solar tower plant in Africa and the first tower plant to achieve 24 hours of operation with solar energy only, but that thanks to the decline in power demand at night, since full power storage lasts only 2 hours.
The KSO is an evolution of the PS10 and PS20 projects, operating since 2007 and 2009 respectively in Spain. KSO solar field is made of more than 4,000 heliostats, totaling up to 576,800 m (6,209,000 sq ft) of mirror surface, focusing solar energy on a boiler located on top a centralized 205-metre-high (673 ft) tower. KSO uses a superheated steam cycle that should be able to reach a maximum operating temperature of 530 °C. Accumulated saturated steam is also used to provide up to two hours of thermal storage at the plant. KSO condenser is cooled with a dry cooling system, a natural draft condenser that uses towers to distribute air across fin blades in order to dissipate heat.
The project has been developed by the Spanish company Abengoa, and the project was financed with help from Industrial Development Corporation (IDC) and community group, Khi Community Trust.
Accident
In November 2014, a crane collapse on site during construction killed two and injured seven. The accident was largely responsible for the project commencing commercial operation fourteen months later than scheduled.
Gallery
-
Khi Solar One, 50 MW, 180 GWh, solar power tower thermal plant -
high oblique aerial photograph of Khi Solar One (Picture October 2016) -
Detail of mirrors -
Khi Solar One tower as seen from a plane just before landing at Upington Airport
Abengoa Bankruptcy
In November 2015, Abengoa started insolvency proceedings. Khi Solar One is one of the assets which Abengoa could be looking to sell.
On 27 December 2016, Abengoa received a “Provisional Acceptance Certificate”, officially handing the plant to its owner Khi Solar One Pty Ltd. Abengoa has a 51% stake, Industrial Development Corporation (IDC) has a 29% stake and Khi Community Trust has a 20% stake in that society. Abengoa will take on the operation and maintenance of the plant. The plant output is sold to grid operator Eskom under a 20-year PPA (Power Purchase Agreement).
Khi Solar One demonstrated in early 2016, up to 24 consecutive hours of operation.
See also
References
- ^ KSO in South Africa
- ^ "Abengoa lauds 24-hour operation of S African solar tower - SeeNews Renewables". renewables.seenews.com. Archived from the original on 2016-06-17. Retrieved 2016-05-25.
- ^ Baring the secrets of Khi Solar One
- ^ CSP-World (2014-11-04). "Two killed and 7 injured in an accident at Abengoa's CSP plant under construction in South Africa". CSP-World. Retrieved 2016-05-25.
- ^ Magcaba, Sbonokuhle. "Two dead and four critical in Upington crane collapse". www.enca.com. Retrieved 2016-05-25.
- ^ "UPDATE 3-Spain's Abengoa starts insolvency proceedings, shares dive". Reuters. 2015-11-25. Retrieved 2016-05-25.
- ^ "The state of renewable energy in SA". CityPress. Retrieved 2016-05-25.
- ^ Tsanova, Tsvetomira (27 December 2017). "Abengoa hands over 50-MW CSP plant in S Africa". www.renewablesnow.com. Renewables Now. Retrieved 6 February 2017.
