Solar Electric Generating Station VIII

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

SEGS VIII is one of the nine Solar Electric Generating Station plants in California’s Mojave Desert. The combined electric generating capacity of these plants, which use parabolic trough technology, is more than 350 megawatts. The plants operate as Qualifying Facility Independent Power Producers under the Public Utility Regulatory Policies Act, with a special Standard Offer 2 type of power purchase agreement to Southern California Edison. SEGS VIII is the largest individual trough plant (along with SEGS IX).
Status Date

Background

Technology
Parabolic Trough
Status
Operational
Location

Harper Dry Lake, CA
United States

County
San Bernardino
Region
Mojave Desert
Lat/Long Location
35°
1'
54.00"
North
117°
20'
53.00"
West
Solar Resource
2725 kWh/m2/yr
Source of Solar Resource
National Solar Resource Data Base
Start Production Date
Project Type
PURPA Qualifying Facility Independent Power Producer, with special Standard Offer 2 (SO-2) type power purchase agreement to Southern California Edison
Incentives
Accelerated depreciation
Federal and state investment incentive
Solar property tax exclusion

Participants

Developer(s)
Luz
Operator(s)
NextEra
Generation Offtaker(s)
Southern California Edison

Plant Configuration

Solar Field

Solar-Field Aperture Area
464,340 m²
SCA Description 1
Parabolic trough SCA
SCA Manufacturer (Model)
Luz (LS-3)
HCE Manufacturer (Model)
Solel Solar Systems (Solel UVAC)
HCE Type
Evacuated
HCE Length
4m
Heat-Transfer Fluid Type
Therminol
Solar-Field Outlet Temp
390ºC

Power Block

Turbine Capacity (Gross)
89 MW
Turbine Capacity (Net)
80 MW
Power Cycle Pressure
100 bar
Turbine Efficiency
37.60% @ full load (Percentage)
Fossil Backup Type
Natural gas
Photo of the backside of rows of parabolic troughs. Fourteen metal frames hold the curved mirrors to form an entire trough; vertical supports are positioned on the ends of each trough. The troughs cast shadows on the ground below.

Project Overview

Project Name: Solar Electric Generating Station VIII (SEGS VIII)
Location: United States
(CA)
Location: Harper Dry Lake (CA)
Owner(s) (%): NextEra (50%)
Technology: Parabolic Trough
Turbine Capacity (Net):
80 MW
Turbine Capacity (Gross):
89 MW
Status: Operational
Start Year: 1989

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