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| Andasol Solar Power Station | |
|---|---|
| Name | Andasol Solar Power Station |
| Country | Spain |
| Location | Guadix, Andalusia |
| Status | Operational |
| Commissioned | 2008–2011 |
| Owner | ACS Group / Acciona / IDEEM / Sener |
| Solar type | Concentrated solar power (CSP) |
| Technology | Parabolic trough with thermal energy storage |
| Site area | ~600 ha (combined) |
| Units | 3 (Andasol 1–3) |
| Capacity mw | 150 (3×50 MW) |
| Annual generation gwh | ~390 |
Andasol Solar Power Station Andasol Solar Power Station is a concentrated solar power complex in the Province of Granada, Andalusia, Spain, consisting of three parabolic trough plants with molten salt thermal energy storage. Situated near the town of Guadix in the Sierra Nevada region, the complex was developed by a consortium led by ACS Group, Acciona, and Sener between 2006 and 2011 and was one of the first commercial-scale CSP plants to combine parabolic trough collectors with integrated thermal storage to provide dispatchable solar electricity to the Spanish grid operated by Red Eléctrica de España.
Andasol is located in the high plain of the Guadix-Baza basin Granada, close to Sierra Nevada (Spain), and was conceived in the context of Spain’s renewable policy framework under laws promoted by the Ministry of Industry and incentives linked to the Spanish feed-in tariff regime. The project involved developers and engineering firms including ACS Group, Acciona, Sener, IDEEM Energy, and financial participants such as European Investment Bank, and contract partners like Siemens and Fluor Corporation for equipment and installation. Andasol’s significance has been noted by institutions such as the International Energy Agency, European Commission, and World Bank for demonstrating thermal storage in large-scale solar power.
The project emerged during the rapid expansion of solar generation in Spain following legislative measures of the early 2000s and renewable targets aligned with European Union directives such as the Renewable Energy Directive (2009/28/EC). Initial planning involved environmental assessments with input from regional authorities in Andalusia and coordination with the Provincial Council of Granada. Construction of Andasol 1 began in 2006, with commissioning in 2008; Andasol 2 followed in 2009, and Andasol 3 reached commercial operation in 2011. The development phase attracted investment from infrastructure funds and utilities, and contracts were negotiated with EPC firms connected to the Madrid Stock Exchange and multinational engineering houses including Sener and Siemens Energy.
Andasol uses parabolic trough collectors developed from designs originating in projects like SEGS in the United States and engineering advances by firms such as Schott AG and Alejandro del Amo-led teams at Sener. Each plant contains fields of curved mirrors that concentrate sunlight on a receiver tube containing heat transfer fluid (HTF) typically synthetic oil supplied via components from Andritz and materials by Saint-Gobain affiliates. Heat from the HTF is exchanged in heat exchangers to store thermal energy in molten salt tanks, a storage technology also deployed in projects evaluated by the U.S. Department of Energy and researched at laboratories such as CENER and CIEMAT. The molten salt storage enables multi-hour discharge, improving dispatchability to balance with power from nuclear facilities like Cofrentes Nuclear Power Plant and thermal plants run by companies such as Endesa.
The combined installed nameplate capacity is approximately 150 MW (three 50 MW units). Reported annual generation is on the order of 350–450 GWh depending on solar irradiance from the Mediterranean Basin and local meteorological patterns influenced by Atlantic Ocean systems and the orography of Sierra Nevada. Capacity factors vary seasonally and have been analyzed in studies by IEA SolarPACES, Fraunhofer ISE, and academic groups at University of Granada and University of Seville. Output is delivered into Spain’s transmission network managed by Red Eléctrica de España, and the project participates in wholesale markets alongside generators like Iberdrola and Naturgy.
Andasol reduced reliance on fossil fuel generation operated by companies such as Repsol and Cepsa by providing low-carbon dispatchable generation credited under national accounting aligned with Kyoto Protocol and subsequent Paris Agreement objectives. Environmental assessments considered impacts on Doñana National Park-scale biodiversity concerns, groundwater resources monitored by the Confederación Hidrográfica del Guadalquivir, and land-use tradeoffs in the Mediterranean forests, woodlands, and scrub ecoregion. Economically, the project generated construction employment, procurement contracts with suppliers like Siemens and Fluor, and has been cited in policy reviews by the European Commission and International Renewable Energy Agency. Critics referenced tariff costs and subsidy structures debated in the Spanish financial crisis (2008–2014) policy discussions involving institutions such as the Ministry of Finance (Spain) and the Bank of Spain.
O&M activities have been conducted by entities affiliated with the original developers and operators, drawing on practices from CSP operators in United States Department of Energy SunShot demonstrations and European operators such as Acciona Energía. Routine work includes mirror cleaning, HTF circuit maintenance, molten salt management, and instrumentation provided by firms like Siemens Energy and control systems vendors integrated with grids monitored by Red Eléctrica de España. Workforce training has involved partnerships with technical institutes including University of Cordoba and trade programs administered in coordination with regional authorities in Andalusia. Insurance and risk management engaged underwriters with ties to markets in London and the European Investment Bank financing mechanisms.
Andasol’s model influenced later CSP plants and hybrid projects combining CSP with photovoltaics developed by companies such as Abengoa, ACWA Power, and Masdar. Research at institutions like CIEMAT, Fraunhofer ISE, and CENER continues to refine molten salt chemistry, direct steam generation, and hybridization with battery storage studied at Imperial College London and Massachusetts Institute of Technology. Policy shifts in the European Green Deal and financing initiatives from the European Investment Bank and private capital markets may determine further replication in North Africa, Middle East, and the Mediterranean basin with consortiums including multinational firms such as Siemens Energy, Acciona, and regional utilities.
Category:Solar power stations in Spain