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This page provides information on Andasol-1, a concentrating solar power (CSP) project, with data organized by background, participants, and power plant configuration. Andasol-1 is the first parabolic trough power plant in Europe. Located in southern Spain, this 300 million Euro power plant has been under construction since June 2006 and began operating in 2008. The nominal production capacity of 50 megawatts is enough electricity for up to 200,000 people. A two-tank indirect thermal storage system holds 28,500 tons of molten salt, and this reservoir can run the turbine for up to 7.5 hours at full load. Andasol-1 and two upcoming companion plants will help the Spanish power grid meet peak summer demand primarily caused by the high energy consumption of air conditioning units.

Status Date: March 20, 2017
Photo of four sections of parabolic troughs segmented by access roads, with each section having about 100 rows of troughs. The high-angle aerial perspective also shows the power plant facility amidst two trough sections, including two circular storage tanks.
Project Overview
Project Name: Andasol-1 (AS-1)
Country: Spain
Location: Aldeire
Owner(s): ACS/Cobra Group (100%)
Technology: Parabolic trough
Turbine Capacity: Net: 49.9 MW Gross: 50.0 MW
Status: Operational
Start Year: 2008

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Technology: Parabolic trough
Status: Operational
Country: Spain
City: Aldeire
Region: Granada
Lat/Long Location: 37°13′ 50.83″ North, 3°4′ 14.08″ West
Land Area: 200 hectares
Solar Resource: 2,136 kWh/m2/yr
Source of Solar Resource: Meteo Station
Electricity Generation: 158,000 MWh/yr (Expected/Planned)
Contact(s): Manuel Cortés; María Sánchez
Company: ACS/Cobra Group
Break Ground: July 3, 2006
Start Production: November 26, 2008
Construction Job-Years: 600
Annual O&M Jobs: 40
PPA/Tariff Date: September 15, 2008
PPA/Tariff Type: Real Decreto 661/2007
PPA/Tariff Rate: 27.0 Euro cents per kWh
PPA/Tariff Period: 25 years
Project Type: Commercial


Developer(s): ACS/Cobra Group
Owner(s) (%): ACS/Cobra Group (100%)
EPC Contractor: UTE CT Andasol-1: Cobra (80%) and Sener (20%)
Operator(s): Cobra O&M
Generation Offtaker(s): Endesa

Plant Configuration

Solar Field

Solar-Field Aperture Area: 510,120 m²
# of Solar Collector Assemblies (SCAs): 624
# of Loops: 156
# of SCAs per Loop: 4
SCA Aperture Area: 817 m²
SCA Length: 144 m
# of Modules per SCA: 12
SCA Manufacturer (Model): UTE CT Andasol-1 (SKAL-ET)
Mirror Manufacturer (Model): Flabeg (RP3)
# of Heat Collector Elements (HCEs): 11,232
HCE Manufacturer (Model): Schott (PTR70)
# of HCEs: 11,232
HCE Manufacturer (Model): Solel (UVAC 2008)
Heat-Transfer Fluid Type: Dowtherm A
Solar-Field Inlet Temp: 293°C
Solar-Field Outlet Temp: 393°C
Solar-Field Temp Difference: 100°C

Power Block

Turbine Capacity (Gross): 50.0 MW
Turbine Capacity (Net): 49.9 MW
Turbine Manufacturer: Siemens (Germany)
Output Type: Steam Rankine
Power Cycle Pressure: 100.0 bar
Cooling Method: Wet cooling
Cooling Method Description: Cooling towers
Turbine Efficiency: 38.1% @ full load
Annual Solar-to-Electricity Efficiency (Gross): 16%

Thermal Storage

Storage Type: 2-tank indirect
Storage Capacity: 7.5 hour(s)
Thermal Storage Description: 28,500 tons of molten salt. 60% sodium nitrate, 40% potassium nitrate. 1,010 MWh. Tanks are 14 m high and 36 m in diameter.