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| Andasol | |
|---|---|
| Name | Andasol |
| Country | Spain |
| Location | Guadix, Granada, Andalusia |
| Status | Operational |
| Construction | 2006–2009 |
| Commissioned | 2008–2011 |
| Owner | ACS, Deutsche Bank, RWE, etc. |
| Operator | Iberdrola (operations contractor) |
| Solar type | CSP |
| Solar technology | Parabolic trough |
| Storage | Molten salt thermal energy storage |
| Capacity MW | 150 (3 × 50 MW) |
| Annual generation GWh | 495 (approx.) |
Andasol is a series of utility-scale concentrated solar power plants in the province of Granada, Andalusia, Spain. The complex was among the first commercial parabolic trough concentrated solar power (CSP) plants with integrated molten salt thermal energy storage in Europe, demonstrating large-scale seasonal dispatchable solar electricity. The scheme is associated with prominent energy companies, financial institutions, engineering firms, regional authorities, and technology providers.
The project is situated near Guadix in Province of Granada, within Andalusia, and consists of three nearly identical units referred to as plants 1, 2 and 3. Each unit comprises parabolic trough fields, heat transfer systems, and two-tank molten salt storage developed from designs by Siemens, Schlaich Bergermann Partner, and other engineering groups. Ownership and financing arrangements involved multinational corporations such as ACS Group, Deutsche Bank, RWE, and investment funds linked to Iberdrola and other energy investors. The facilities were developed during a period of Spanish renewable policy initiatives under the administration of José Luis Rodríguez Zapatero and legislative frameworks tied to Spanish renewable incentives and European Union targets.
The plants employ parabolic trough collectors supplied by manufacturers and technology licensors including Schott AG and subsidiaries, using heat transfer fluids like synthetic oil to deliver thermal energy to steam generators. Thermal energy is stored in two-tank molten salt systems based on binary mixtures of sodium nitrate and potassium nitrate similar to systems used at Nevada Solar One adaptations and research from Sandia National Laboratories and Delft University of Technology studies. The design integrates steam turbines and generators manufactured by industrial suppliers such as Siemens and uses balance-of-plant equipment by engineering firms including ABB and Foster Wheeler. The site selection considered solar resource assessments from institutions like Instituto de Energías Renovables and stood within a regional network of Mediterranean CSP research exemplified by collaboration with CIEMAT.
Construction began in the mid-2000s with civil works, solar field erection, and installation of thermal storage tanks managed by contractors tied to ACS Group and international EPC partners. The staged commissioning of the three units occurred between 2008 and 2011, with grid connection coordinated with Red Eléctrica de España and regional distribution partners. Project financing drew on instruments from European Investment Bank discussions and commercial lenders including Deutsche Bank, with contractual arrangements governed by public support schemes deriving from Spanish feed-in tariff legislation shaped by the Ministry of Industry, Tourism and Trade (Spain) and subsequent regulatory reforms.
Operational management combined local operators with technical oversight from multinational firms; maintenance regimes included mirror cleaning protocols and thermal fluid monitoring referenced in standards from American Society of Mechanical Engineers and CSP operational best practices developed in research from National Renewable Energy Laboratory. The plants provide baseload-displacing generation, offering up to several hours of dispatchable output after sunset via molten salt storage, contributing to regional supply adequacy alongside conventional generators such as Endesa thermal plants and interconnections with national transmission. Performance metrics reported capacity factors and annual generation figures that were analyzed in studies by International Energy Agency and academic groups at University of Seville and University of Granada.
Environmental assessments referenced local biodiversity evaluations by Junta de Andalucía authorities and impact statements considering water use, land take, and visual effects relative to protected landscapes administered through Ministerio para la Transición Ecológica. Economically, the project created construction and operations jobs and became a case study in investment returns for institutional investors like KfW-backed funds, while being scrutinized in analyses by OECD and European Commission reports on renewable subsidy efficiency. Emission displacement estimates compared lifecycle greenhouse gas outcomes against fossil alternatives promoted by utilities such as Iberdrola and Repsol.
The project attracted criticism related to the cost of Spanish renewable incentives and feed-in tariffs debated in parliamentary inquiries by members of Congreso de los Diputados and fiscal reviews by the Court of Auditors (Spain). Environmental groups and local stakeholders including conservation NGOs raised concerns about land use and water consumption impacts in semi-arid landscapes, drawing comparisons with debates over projects in Tabernas Desert and other Andalusian developments. Financial critiques focused on tariff levels, investor returns, and post-2012 regulatory adjustments that affected assets held by entities like RWE and private equity firms.
Andasol influenced subsequent CSP projects and research into thermal storage, informing newer developments in Morocco and projects evaluated under Horizon 2020 and successor EU research programmes. Lessons from operation and financing practices contributed to academic literature in institutions such as Cranfield University and policy recommendations by IEA SolarPACES. The plants remain cited in discussions on integrating seasonal thermal storage, hybridisation with photovoltaics researched at Fraunhofer ISE, and retrospective assessments of Spain’s renewable rollout during the early 21st century.
Category:Solar power stations in Spain Category:Concentrated solar power