Solana Generating Station
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The Solana Generating Station is a
solar power Solar power is the conversion of energy from sunlight into electricity, either directly using photovoltaics (PV) or indirectly using concentrated solar power. Photovoltaic cells convert light into an electric current using the photovoltaic e ...
plant near
Gila Bend Gila Bend (; O'odham: Hila Wi:n), founded in 1872, is a town in Maricopa County, Arizona, United States. The town is named for an approximately 90-degree bend in the Gila River, which is near the community's current location. As of the 2020 cen ...
,
Arizona Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a state in the Southwestern United States. It is the 6th largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Fou ...
, about southwest of
Phoenix Phoenix most often refers to: * Phoenix (mythology), a legendary bird from ancient Greek folklore * Phoenix, Arizona, a city in the United States Phoenix may also refer to: Mythology Greek mythological figures * Phoenix (son of Amyntor), a ...
, completed in 2013. When commissioned it was the largest
parabolic trough A parabolic trough is a type of solar thermal collector that is straight in one dimension and curved as a parabola in the other two, lined with a polished metal mirror. The sunlight which enters the mirror parallel to its plane of symmetry is foc ...
plant in the world and the first U.S. solar plant with molten salt thermal energy storage. Built by the Spanish company
Abengoa Solar Abengoa Solar (formerly Solúcar Energía) is a subsidiary of Abengoa. Its primary activities include designing, promotion, financing attainment, construction and operation of solar power stations that use photovoltaics, concentrated photovoltaic ...
, it has a total capacity of 280 
megawatts The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantify the rate of energy transfer. The watt is named after James Wat ...
(MW) gross, from two 140 MW gross (125 MW net) steam turbine generators, which is enough to power 70,000 homes while avoiding around 475,000 tons of CO2 every year. Its name is the
Spanish Spanish might refer to: * Items from or related to Spain: **Spaniards are a nation and ethnic group indigenous to Spain **Spanish language, spoken in Spain and many Latin American countries **Spanish cuisine Other places * Spanish, Ontario, Can ...
term for "sunny spot".


Technology

The plant employs a proprietary
concentrating solar power Concentrated solar power (CSP, also known as concentrating solar power, concentrated solar thermal) systems generate solar power by using mirrors or lenses to concentrate a large area of sunlight into a receiver. Electricity is generated when ...
(CSP) trough technology developed by
Abengoa Abengoa, S.A. was a Spanish multinational company in the green infrastructure, energy and water sectors. The company was founded in 1941 by Javier Benjumea Puigcerver and José Manuel Abaurre Fernández-Pasalagua, and was based in Seville, Sp ...
, and covers an area of . Construction was expected to create about 1,500 construction jobs with the plant employing 85 full-time workers. Solar thermal plants use substantially more water for cooling than other solar generating technologies. Nevertheless, the
Sierra Club The Sierra Club is an environmental organization with chapters in all 50 United States, Washington D.C., and Puerto Rico. The club was founded on May 28, 1892, in San Francisco, California, by Scottish-American preservationist John Muir, who be ...
supported the Solana plant, because it was built on private land, and was projected to use "75 to 85 percent less water than the current agricultural use."


Economics

Arizona Public Service Arizona Public Service (APS) is the largest electric utility in Arizona, United States. Since 1985, it has been the principal subsidiary of publicly traded S&P 500 member Pinnacle West Capital Corporation, known as AZP Group until 1987. Pinnacl ...
(APS) has contracted to purchase 100% of the power output generated from Solana, to meet the
Arizona Corporation Commission The Arizona Corporation Commission is the Public Utilities Commission of the State of Arizona, established by Article 15 of the Arizona Constitution. Arizona is one of only fourteen states with elected commissioners. The Arizona Constitution exp ...
's (ACC) mandate that the state's regulated utilities provide 15% of their electricity from
renewable energy Renewable energy is energy that is collected from renewable resources that are naturally replenished on a human timescale. It includes sources such as sunlight, wind, the movement of water, and geothermal heat. Although most renewable energy ...
sources by 2025. APS will pay about 14 cents per kWh. The Solana plant was originally planned to open in 2011 and was estimated to cost $2 billion. In December 2010, Abengoa received a $1.45 billion
loan guarantee A loan guarantee, in finance, is a promise by one party (the guarantor) to assume the debt obligation of a borrower if that borrower defaults. A guarantee can be limited or unlimited, making the guarantor liable for only a portion or all of the d ...
to support construction of the plant.


Energy storage

One of the principal advantages of concentrated solar thermal (CST) is that
thermal energy storage Thermal energy storage (TES) is achieved with widely different technologies. Depending on the specific technology, it allows excess thermal energy to be stored and used hours, days, months later, at scales ranging from the individual process, ...
can be provided efficiently, so that output can be provided after the sun goes down, and output can be scheduled to meet demand requirements. The Solana Generating Station is designed to provide six hours of energy storage. This allows the plant to generate about 38 percent of its rated capacity over the course of a year.


Production

Solana Generating Station's production is as follows, averaging 742 GW·h annual, yielding about 390 MW·h/acre. Maximum annual electricity production was projected at 900,000 MW·h (900 GW·h), as calculated using the project's and
NREL The National Renewable Energy Laboratory (NREL) in the US specializes in the research and development of renewable energy, energy efficiency, energy systems integration, and sustainable transportation. NREL is a federally funded research and d ...
specific capacity factors. In 2020, Solana Generating Station has averaged 82.4% of the projected production value. Nearby photovoltaic power station Agua Caliente, covering a larger site area of 2400 acres, had a Loan Programs Office projected generation of only 559 GW·h (instead yielding an average real 727 GW·h production).


Operations issues

The plant opened in 2014 and has experienced some problems since its opening. In the summer of 2017, the plant had two transformer fires.
Maricopa County Maricopa County is in the south-central part of the U.S. state of Arizona. As of the 2020 census, the population was 4,420,568, making it the state's most populous county, and the fourth-most populous in the United States. It contains about 6 ...
environmental officials questioned whether the plant violated air pollution standards, and in 2016, fined the plant $1.5 million for violations of air quality standards. According to the ''Phoenix New Times'', "The plant’s parent company, a subsidiary of
Abengoa Abengoa, S.A. was a Spanish multinational company in the green infrastructure, energy and water sectors. The company was founded in 1941 by Javier Benjumea Puigcerver and José Manuel Abaurre Fernández-Pasalagua, and was based in Seville, Sp ...
called Atlantica Yield, downplayed the issues, and a company representative said that better times are likely ahead." According to government documents, the plant is expected to produce 900,000 MWh every year. This amount of electricity could power about 65,000 typical homes in Arizona. However, the plant produced only 600,000 MWh in its first full year of operation, according to information from the Federal Energy Information Administration. In 2015, the output increased to 700,000 MWh. In the summer of 2017, a microburst "knocked out the plant that July." but notwithstanding that, generation reached 723,966 MWh. A CSP thermal power block is like that of a coal or gas-fired plant, except its fuel is sunlight and require up to four years to ramp-up to 100% operating level.


See also

*
Energy storage Energy storage is the capture of energy produced at one time for use at a later time to reduce imbalances between energy demand and energy production. A device that stores energy is generally called an accumulator or battery. Energy comes in ...
*
List of energy storage projects This is a list of energy storage power plants worldwide, other than pumped hydro storage. Many individual energy storage plants augment electrical grids by capturing excess electrical energy during periods of low demand and storing it in o ...
*
Solar power in Arizona Solar power in Arizona has the potential to, according to then-Governor Janet Napolitano, make Arizona "the Persian Gulf of solar energy". In 2012, Arizona had 1,106 MW of photovoltaic (PV) solar power systems, and 6 MW of concentrated ...
*
SEGS Solar Energy Generating Systems (SEGS) is a concentrated solar power plant in California, United States. With the combined capacity from three separate locations at 354 megawatt (MW), it was once the world's second largest solar thermal energy g ...
, nine solar power plants in California's Mojave Desert.


References


Further reading

* Wald, Matthew L
Arizona Utility Tries Storing Solar Energy for Use in the Dark
''
The New York Times ''The New York Times'' (''the Times'', ''NYT'', or the Gray Lady) is a daily newspaper based in New York City with a worldwide readership reported in 2020 to comprise a declining 840,000 paid print subscribers, and a growing 6 million paid ...
'', October 18, 2013, p. B1 (New York edition); also published online at NYTimes.com on October 17, 2013. Retrieved October 18, 2013. Discusses
BrightSource Energy BrightSource Energy, Inc. is an Oakland, California based, corporation that designs, builds, finances, and operates utility-scale solar power plants. Greentech Media ranked BrightSource as one of the top 10 greentech startups in the world in 200 ...
,
Electric Power Research Institute EPRI, is an American independent, nonprofit organization that conducts research and development related to the generation, delivery, and use of electricity to help address challenges in the energy industry, including reliability, efficiency, affo ...
, Ivanpah Solar Power Facility project, and the Solana Generating Station project.


External links

* *
Arizona Utility to Buy Power from a 280-Megawatt Solar Power Plant
* {{Generating stations in Arizona Solar power stations in Arizona Buildings and structures in Maricopa County, Arizona Solar thermal energy