La centrale solaire thermique à concentration et stockage de chaleur aux sels fondus va bientot entrer en service en Arizona.
C 'est le projet SOLANA. 2 turbines de 140 MW chacune.
125000 tonnes de sels fondus !!!
Citation:
New Arizona Concentrated Solar Power (CSP) Plant Keeps Producing Electricity After Sun Goes Down
03/10/2013 Evwind
Unlike other solar-powered electrical plants, the new Solana Concentrating Solar Power (CSP) keeps the sun’s energy working after dark to produce electricity for APS customers across Arizona.
Unlike other solar-powered electrical plants, the new Solana Generating Station keeps the sun’s energy working after dark to produce electricity for APS customers across Arizona. The three-square-mile facility near Gila Bend, Ariz., uses concentrated solar power (CSP) technology and thermal energy storage to capture the sun’s heat to generate clean, renewable electricity. (Photo: Business Wire)
Solana represents an important technological advance in solar energy production compared to the more-common photovoltaic technology, which needs direct sunlight in order to produce electricity. The three-square-mile facility near Gila Bend uses concentrated solar power (CSP) technology and thermal energy storage to capture the sun’s heat to generate clean, renewable electricity.
This technology enables Solana to produce electricity at full capacity for up to six hours after sunset, including the early evening hours when customer demand for power typically peaks in Arizona.
“Solana is a monumental step forward in solar energy production,” said Don Brandt, APS President and Chief Executive Officer. “Solana delivers important value to APS customers by generating power when the sun isn’t shining. It also increases our solar energy portfolio by nearly 50 percent. This provides a huge boost toward our goal to make Arizona the solar capital of America.”
Solana is one of the largest power plants of its kind in the world with a capacity of 280 megawatts, enough to provide energy for 70,000 Arizona homes – a city the size of Yuma. APS is purchasing 100 percent of the output from Solana, which was constructed and is owned by Abengoa Solar.
The plant’s CSP technology produces electricity by collecting the sun’s heat to create steam that turns conventional turbines. The process begins with 2,700 parabolic trough mirrors, which follow the sun to focus its heat on a pipe containing a heat transfer fluid. This fluid, a synthetic oil, can reach a temperature of 735 degrees Fahrenheit. The heat transfer fluid then flows to steam boilers, where it heats water to create steam. The steam drives two 140-megawatt turbines to produce electricity, much like a traditional power plant.
What separates Solana from other solar power plants is the ability to store the heat from the sun up to six hours for electrical production at night. In addition to creating steam, the heat transfer fluid is used to heat molten salt in tanks adjacent to the steam boilers. The thermal energy storage system includes six pairs of hot and cold tanks with a capacity of 125,000 metric tons of salt, and the molten salt is kept at a minimum temperature of 530 degrees Fahrenheit.
When the sun goes down, the heat transfer fluid can be heated by the molten salt to create steam by running it through the tanks instead of the field of parabolic mirrors.
http://www.evwind.es/2013/10/03/new-ari ... down/36442voir aussi le wikipedia en Anglais :
http://en.wikipedia.org/wiki/Solana_Generating_Stationet selon Reuters c'est entré en service la semaine dernière.
Cout de 2 milliards de $ !
A 70 km au Sud de Phoenix.
Citation:
Abengoa's Arizona Solana solar power plant enters service
Oct 9, 2013 Reuters
Spanish technology and engineering company Abengoa SA said on Wednesday the 280-megawatt Solana solar thermal power plant in Arizona entered service earlier this week.
The plant, which cost about $2 billion to build, has a thermal energy storage system that is able to generate electricity for six hours after the sun goes down.
The plant is located near Gila Bend about 70 miles southwest of Phoenix.
Abengoa said the construction of the plant, which started in 2010, created more than 2,000 jobs.
The plant consists of parabolic shaped mirrors mounted on structures that track the sun and concentrate the sun's rays to heat water into steam to power a conventional turbine.
Arizona Public Service, a unit of Pinnacle West Capital Corp, will buy all the power produced by the plant for 30 years. The plant will generate enough power for about 70,000 homes.
To help finance the plant's construction, the U.S. Department of Energy gave Solana a $1.45 billion federal loan guarantee.
Last week, a unit of media holding company Liberty Interactive Corp invested $300 million in the Solana project.
http://www.reuters.com/article/2013/10/ ... 2320131009


source :
http://blogs.phoenixnewtimes.com/valley ... t_know.php