Extresol 1

General Info
Owner/s: 
Cobra
Technology: 
Parabolic trough
Country: 
Spain
Status: 
Operational
Purpose: 
Commercial
Usage: 
Electricity
Power: 
50.00 MW
Construction start date: 
July 2007
Start date: 
September, 2009
Location: 
Torre de Miguel Sesmero, Badajoz
Generation: 
170.00 GWh
Land area: 
200 hectares
Technology

Solar field

Solar Collector Assemblies - Trough: 
SENER SENERTrough
Mirrors / Reflective surface: 
Flabeg RP3
Number of SCAs: 
624
Number of loops: 
156
Number of SCAs per loop: 
4
Number of modules per SCA: 
12
SCA aperture area: 
817 m²
SCA length: 
144 m
Reflecting area: 
510 120 m²
Heat Collector Element (Tube): 
Schott PTR70
Number of HCEs: 
22464
Receiver type: 
Evacuated
Heat Transfer Fluid: 
Dowtherm A
HTF Temp in: 
293ºC
HTF Temp out: 
393ºC

Power block

Storage Y/N: 
Yes
Storage type: 
two tank indirect - molten salts
Storage: 
7.50 Hours
Power cycle: 
Steam Rankine
Power cycle pressure: 
100 bar
Turbine: 
Siemens SST700
Turbine efficiency: 
38.1% at full load
Cooling: 
Wet
Cooling method: 
Cooling tower
Power (gross): 
50.00 MW
Power (net): 
49.90 MW
Annual Solar-to-Electricity Efficiency (Gross): 
16%
Backup: 
Yes
Backup type: 
Natural gas for HTF boilers - 15% max
Companies involved
Project developer: 
Cobra
EPC: 
Cobra
SENER
O&M: 
Cobra
Key components suppliers: 
Siemens
Schott
Flabeg
Suppliers details: 
SENER (parabolic troughs)
Siemens (Turbine)
Schott (HCE receiver tube)
Flabeg (Mirrors)
Lointek (Heat exchangers and steam generation)
Flowserve (control valves)
ABB (Power automation for solar field and power block)
Tamoin (Installation and assembly of power block)
BValve (Valves)
Dow Chemicals (HTF)
Wika (pressure and temperature measurement)
AKO (Electric tracing)
Smit
Tedagua (Water treatment)
Saidi
CCi (Valves)
Dimasa (Polyester storage tanks)
GEA Iberica (Water-cooled Vacuum Steam Surface Condensers)
Ideas en Metal (Metal structures for solar field)
Magline (magnetic measuring technology for position detection parabolic troughs)
Samson (Control valves)
Sindus (Coolig towers)
Talleres Vaca (Boiling works)
Rosni (Drive pylons)
Pam Saint-Gobain (Water pipes)
Comeval (Valves)
Imasa (Manufacturing, assembling and insulation for HTF pipes)
Epsilon Tracing (Electric tracing)
Schubert & Salzer - BVALVE (Valves)
Laitu solar (Troughs cleaning and/or pressure testing)
MTS (valves)
Energia Gigjon (Metal sttructures)
Reyco (Valves calibration and/or other valves related works)
Flexim (Flowmeter for HTF and/or Molten Salt)
Esindus (Cooling towers)
Ensival Moret (Pumps)
Socioeconomics
Generation Offtaker: 
Endesa
PPA/Tariff: 
Spain RD661/2007 Feed-in-Tariff - 25 years - 27 eurocent per kWh
Construction Employment: 
600 jobs-year
O&M employment: 
40
Other
Solar resource: 
2 165 kWh/m2/yr
Solar resource source: 
Meteo station
General comments:

After the successful construction of Andasol, Cobra began the construction of Extresol complex, a set of three plants 50 MW each

Aerial view of Extresol Extresol 1 under construction Extresol 1 power block
Videos: