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This page provides information on Archimede, a concentrating solar power (CSP) project, with data organized by background, participants, and power plant configuration. Archimede is a parabolic trough plant operating in Sicily, Italy. The plant produces steam (4.72-MW equivalent) sent to a combined-cycle steam turbine rated at 130 MW. This parabolic trough system is the first using molten salt as the heat-transfer fluid. A 2-tank direct system will provide 8 hours of thermal storage.

Status Date: August 3, 2012
Project Overview
Project Name: Archimede
Country: Italy
Location: Priolo Gargallo
Owner(s): ENEL (100%)
Technology: Parabolic trough
Turbine Capacity: Net: 4.72 MW Gross: 5.0 MW
Status: Operational
Start Year: 2010

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Technology: Parabolic trough
Status: Operational
Country: Italy
City: Priolo Gargallo
Region: Sicily
Lat/Long Location: 37°8′ 3.12″ North, 15°13′ 0.15″ East
Land Area: 8 hectares
Solar Resource: 1,936 kWh/m2/yr
Source of Solar Resource: ENEL
Electricity Generation: 9,200 MWh/yr (Expected/Planned)
Contact(s): Daniele Consoli
Company: ENEL
Break Ground: July 21, 2008
Start Production: July 14, 2010


Developer(s): ENEL
Owner(s) (%): ENEL (100%)
Operator(s): ENEL

Plant Configuration

Solar Field

Solar-Field Aperture Area: 31,860 m²
# of Solar Collector Assemblies (SCAs): 54
# of Loops: 9
# of SCAs per Loop: 6
SCA Aperture Area: 590 m²
SCA Length: 100 m
# of Modules per SCA: 8
SCA Manufacturer (Model): COMES (ENEA)
Mirror Manufacturer: Ronda Reflex
# of Heat Collector Elements (HCEs): 1,296
HCE Manufacturer: Archimede Solar Energy
Heat-Transfer Fluid Type: Molten salt (60% NaNO?, 40% KNO?)
Solar-Field Inlet Temp: 290°C
Solar-Field Outlet Temp: 550°C
Solar-Field Temp Difference: 260°C

Power Block

Turbine Capacity (Gross): 5.0 MW
Turbine Capacity (Net): 4.72 MW
Turbine Manufacturer: Tosi
Turbine Description: The plant produces steam that is sent to the CC steam turbine, rated at 130 MW; the 4.72 MW datum is the calculated capacity added by the solar steam
Power Cycle Pressure: 93.83 bar
Cooling Method: Wet cooling
Turbine Efficiency: 39.3% @ full load
Annual Solar-to-Electricity Efficiency (Gross): 15.6%

Thermal Storage

Storage Type: 2-tank direct
Storage Capacity: 8 hour(s)
Thermal Storage Description: Total of 1,580 tons of molten salt. 60% sodium nitrate, 40% potassium nitrate. Capacity 100 MWh (thermal). Tanks are 6.5 m high and 13.5 m in diameter.