Apr 06, 2012
Boosting coal with solar has localisation potential, Areva arguesBack
Construction|Tuscon|Africa|AREVA Solar|Business|CoAL|Coal-fired Power Station|Design|Eskom|Gas|Generator|India|Installation|Nuclear|Power|Projects|Solar|Storage|System|Technology|Tuscon Electric Power|Water|Africa|Australia|South Africa|United States|Liddell Facility|Carbon Steel Piping|Electricity|Energy|Nuclear Firm Subsidiary|Product|Steel|Mikael Hajjar|Arizona|North Africa|CLFR Technology|Storage Technologies
The solar boiler uses compact linear Fresnel reflector (CLFR) technology, which consists of a solar array field of low-iron flat mirrors that focus sunlight up to a central receiver in which water boils into super-heated steam (up to 482 ºC). This steam is then injected directly into the coal-fired power station’s boiler to generate additional power without added emissions.
Further, the system is compatible with the dry-cooling designs of the Matimba and Medupi coal-fired power stations, in Limpopo, and can be used in a closed-loop system to conserve water.
“The advantage of the CLFR technology is its small land footprint. One booster will require about 6 ha, which, under Matimba’s sun, is above 7 MW electric or 22 MW thermal.
“Further, from the moment we receive notice to proceed to the final commissioning date, it will be reasonable to achieve completion within 18 months to deliver a 50 MW boost to Matimba, for example,” says Hajjar.
The boiler design has American Society of Mechanical Engineers S-stamp certification and is similar to a conventional boiler, which means it fits into South Africa’s skills profile.
“The carbon steel piping and the frame structure for the booster can also be sourced locally relatively easily and our estimates indicate that we can easily reach above 60% local content, and that 80% local content is reasonably achievable,” he adds.
Over the longer term, Areva Solar aims to grow local capacity and, once South African industries can provide supplies more readily, it will be able to lower costs and progressively achieve standalone stations with a competitive price tag, compared with standalone photo- voltaic (PV) stations.
Areva Solar was the first to successfully augment a coal-fired power plant using its CLFR system. Its integrated solar steam generator performance has been proven at the Liddell facility, in Australia, since 2008. The company is currently constructing a 44 MW solar augmentation facility at another coal-fired power station in Australia and recently announced a partnership with US utility Tuscon Electric Power to build a solar booster at a duel-fuelled generating station in Tuscon, Arizona.
“It is a proven and simple technology with more than 500 MW electric under construction, under contract or in advanced development in India, Australia, North Africa and the US.”
The technology was designed as a conventional boiler for hybrid application. However, Areva Solar will deliver the first of several 125 MW standalone concentrated solar power (CSP) plant units late next year.
However, a lack of policy framework for the technology is preventing it from competing effectively against other renewable technologies, such as PV and wind.
“Until policymakers have modified regulations to support steam tariff booster applications, which will enable us to compete on price with PV, currently our only way to compete is through a smaller land footprint and high local content,” he notes, adding that the technology offers up to 20 minutes of thermal inertia under cloudy conditions, which reduces its variability and which has not been addressed by government policy frameworks.
Areva Solar’s CLFR technology is able to reliably produce super-heated steam at 370 ºC through partial cloud cover. Further, the arrays are aligned south-to-north and the single-axis mirrors track the sun east-to-west. In its technology development roadmap, Areva Solar also has both a short-term and a longer-term storage solution for CSP standalone product offerings.
“AREVA Solar responded to the South African Depart of Energy’s request for information for over 150 MWe net of Solar Thermal Co-Generation Energy Projects with both State-owned power utility Eskom and independent power producers (IPPs).
Edited by: Martin Zhuwakinyu
Creamer Media Senior Deputy Editor
To subscribe email email@example.com or click here
To advertise email firstname.lastname@example.org or click here
Other Renewable Energy News
Article contains comments
Initial results of a solar photovoltaic (PV) installation at 382 Jan Smuts avenue are proving to be “exciting”, with 300 highly-efficient rooftop solar panels providing 26% of the three-storey building’s electricity requirements. The installation, managed by Spire...
Updated 4 hours ago The JSE-listed Emira Property Fund has invested over R250-million in acquiring new centres and upgrading its shopping centres to strengthen its retail assets, according to Emira CEO Geoff Jennett, who stated on Thursday that the company was investing strategically....
Updated 5 hours ago JSE-listed Equites Property Fund achieved an 18.3% year-on-year increase in distributions to 96.6c a share for the year ended February 29. “The distribution growth reflects the strong property fundamentals of the Equites logistics portfolio,” Equites CEO Andrea...
Updated 5 hours ago It takes a coherent company to successfully and sustainably close the gap between strategy and execution in Africa, and one of the key factors in doing so is unconventional leadership, which is needed to foster the behavior required of coherent companies, according...
Recent Research Reports
Energy Roundup – May 2016 (PDF Report)
The May 2016 roundup covers activities across South Africa for April 2016 and includes details of the National Energy Regulator of South Africa’s proposal to introduce a coal benchmark cost as part of its final decision on Eskom’s multiyear price determination...
Automotive 2016: A review of South Africa's automotive sector (PDF Report)
Creamer Media’s Automotive 2016 Report provides an overview of South Africa’s automotive industry over the past 12 months. The report provides insight into local demand and production, vehicle imports and exports, investment and competitiveness in the sector, as well...
Energy Roundup – April 2016 (PDF Report)
The April 2016 roundup covers activities across South Africa for March 2016 and includes details of a North Gauteng High Court Judge’s dismissal of a court application to postpone the 9.4% electricity tariff increase, which the National Energy Regulator of South...
Electricity 2016: A review of South Africa's electricity sector (PDF Report)
Creamer Media’s Electricity 2016 report provides an overview of South Africa’s electricity sector, focusing on State-owned power utility Eskom and independent power producers, electricity planning, transmission, distribution and the theft thereof, besides other issues.
Energy Roundup – March 2016 (PDF Report)
The March 2016 roundup covers activities across South Africa for February 2016 and includes details of the Department of Energy’s plans to announce the preferred bidders for the first tranche of the coal independent power producer procurement programme; the Council...
Steel 2016: A review of South Africa's steel sector (PDF Report)
Creamer Media’s Steel 2016 Report examines South Africa’s steel industry over the past 12 months. The report provides insight into the global steel market and and particularly into South South Africa’s steel sector, including production and consumption, main...
This Week's Magazine
The two spent-fuel pools at Eskom’s 1 800 MW Koeberg nuclear power station, in the Western Cape, will be full by 2018, increasing the urgency on the State-owned utility to begin pursuing alternative storage options. Koeberg has, over the past 32 years, accumulated a...
South Africa lacks the skills necessary to implement the government’s plan to build 9.6 GWe of new nuclear energy capacity, warns nuclear-qualified Quality Strategies International CEO David Crawford. “Apart from the concern about the affordability of the programme,...
Cybersecurity multinational Check Point has released its latest 700-series cybersecurity systems for small businesses, which draw on its international threat intelligence to provide up-to-date cybersecurity, says Check Point South Africa country manager Doros...
Daimler Trucks and Buses Southern Africa (DTBSA) saw a marked slip in new-vehicle sales in 2015 compared with 2014, with sales dropping from 5 897 units to 5 300 units. The decline came as the South African new truck and bus market declined from 31 558 units in 2014...
Group of 20 (G-20) economies threatened to penalise havens that don’t share information on their banking clients after the leak of the Panama Papers provoked a global uproar over tax evasion. The G-20 will consider “defensive measures” against financial centers and...