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Saguaro Power Plant

This page provides information on Saguaro, a concentrating solar power (CSP) project, with data organized by background, participants, and power plant configuration.

Status Date: April 14, 2017
Project Overview
Project Name: Saguaro Power Plant
Country: United States
Location: Red Rock, Arizona
(Southwest USA)
Owner(s): Arizona Public Service (100%)
Technology: Parabolic trough
Turbine Capacity: Net: 1.0 MW Gross: 1.16 MW
Status: Currently Non-Operational
Start Year: 2006

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Technology: Parabolic trough
Status: Currently Non-Operational
Country: United States
City: Red Rock
State: Arizona
County: Pinal County
Region: Southwest USA
Lat/Long Location: 32°32′ 52.0″ North, 111°17′ 34.0″ West
Land Area: 16 acres
Solar Resource: 2,636 kWh/m2/yr
Source of Solar Resource: NREL
Electricity Generation: 2,000 MWh/yr (Expected/Planned)
Contact(s): Phil Smithers
Company: Arizona Public Service (APS)
Break Ground: June 2004
Start Production: January 2006
Cost (approx): 6,000,000 USD
Project Type: Production


Developer(s): Arizona Public Service
Owner(s) (%): Arizona Public Service (100%)
EPC Contractor: Solargenix
Operator(s): Arizona Public Service
Generation Offtaker(s): Arizona Public Service

Plant Configuration

Solar Field

Solar-Field Aperture Area: 10,340 m²
# of Solar Collector Assemblies (SCAs): 24
# of Loops: 3
# of SCAs per Loop: 8
SCA Length: 97 m
# of Modules per SCA: 12 and 8
SCA Manufacturer (Model): Starnet (LS-2)
SCA Description: Second-generation parabolic trough collectors
SCA Drive Manufacturer: Parker-Hannefin
Mirror Manufacturer: Flabeg
# of Heat Collector Elements (HCEs): 528
HCE Manufacturer (Model): Schott Glass (Schott PTR70)
HCE Type (Length): Evacuated (4 m)
Heat-Transfer Fluid Type: Xceltherm 600 (solar field); n-pentane (ORC working fluid)
HTF Company: Radco Industries
Solar-Field Inlet Temp: 248°F
Solar-Field Outlet Temp: 572°F
Solar-Field Temp Difference: 324°F

Power Block

Turbine Capacity (Gross): 1.16 MW
Turbine Capacity (Net): 1.0 MW
Turbine Manufacturer: Ormat (Israel)
Output Type: Organic Rankine
Power Cycle Pressure: 323.0 psi
Cooling Method: Wet cooling
Turbine Efficiency: 20.7% @ full load
Design-Point Solar-to-Electricity Efficiency: 12.1%
Design-Point Conditions: Nominal ambient temp dry=80°F, relative humidity=30%, wet-bulb temp=60°F
Annual Solar-to-Electricity Efficiency (Gross): 7.5%
Fossil Backup Type: None

Thermal Storage

Storage Type: None