Extresol 2

General Info
Owner/s: 
Cobra
GE
KGAL
Technology: 
Parabolic trough
Country: 
Spain
Status: 
Operational
Purpose: 
Commercial
Usage: 
Electricity
Power: 
50.00 MW
Start date: 
April, 2010
Location: 
Torre de Miguel Sesmero, Badajoz, Extremadura
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): 
Solel UVAC2008
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 boiler - 15% max
Companies involved
Project developer: 
Cobra
EPC: 
Cobra
SENER
O&M: 
Cobra
Key components suppliers: 
Siemens
Solel
Flabeg
SENER
Suppliers details: 
SENER (Parabolic troughs)
Siemens (Turbine)
Solel (HCE receiver tuebe)
Flabeg (Mirrors)
Dow Chemicals (HTF)
Lointek (Heat exchanger and steam generation)
Wika (pressure and temperature measurement)
ABB (Power automation for solar field and power block)
AKO (Electric tracing)
Flowserve (control valves)
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)
BValve (Valves)
Saidi (Valves)
Samson (Control valves)
Sindus (Coolig towers)
Smit
Comeval (Valves)
Imasa (Manufacturing, assembling and insulation for HTF pipes)
Pam Saint-Gobain (Water pipes)
Talleres Vaca (Boiling works)
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)
Esindus (Cooling towers)
Ensival Moret (Pumps)
Tedagua (Water treatment)
Socioeconomics
Generation Offtaker: 
Endesa
PPA/Tariff: 
Spain RD661/2007 Feed-inTariff - 25 years - 27 eurocent per kWh
Construction Employment: 
600 jobs-year
O&M employment: 
40
Other
Solar resource: 
2 168 kWh/m2/yr
Solar resource source: 
Meteo station
Other info: 

The plant was initially owned by Cobra. In October 211, Cobra sold 93% to GE and KGAL for €111.1 million. The operation was approved by EU on March 2012.

General comments:
Documents and links:
AttachmentSize
PDF icon Permit for Extresol 2 (Spanish)94.81 KB
PDF icon EU approval for acquisition by GE and KGAL16.49 KB
Videos: