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Copyright 2008-10,
CaliforniaPHOTON.com
V 1.06
site last updated: 6/26/2010

C a l i f o r n i a   P H O T O N

Solar Electricity Generating Systems (SEGS)

The Solar Electricity Generating Systems (SEGS) are a set of nine solar thermal power plants located at three separate facilities in California's Mojave Desert. The plants use parabolic trough reflectors with adjustable pitch to focus sunlight on clear tubes containing a synthetic oil running along the reflectors' focal lines. 1   2  

The plants, which have a combined peak capacity of 354 megawatts, and an average output of around 75 megawatts, comprise the largest solar installation in the world. Power from the SEGS plants is sold to Southern California Edison under long-term contracts.

In 2005, the five plants at Kramer Junction (SEGS III-VII) were acquired by FPL Energy and Carlyle/Riverstone.

SEGS plant history and operational data
Plant Year
built
Location Net turbine
capacity
Field
area
Gross solar production
of electricity (megawatt-hours)
megawatts square meters 1996 average 1998–2002
SEGS I 1984 Daggett 14 82,960 19,900 16,500
SEGS II 1985 Daggett 30 165,376 36,000 32,500
SEGS III 1986 Kramer Jct. 30 230,300 64,170 68,555
SEGS IV 1986 Kramer Jct. 30 230,300 61,970 68,278
SEGS V 1987 Kramer Jct. 30 233,120 71,439 72,879
SEGS VI 1988 Kramer Jct. 30 188,000 71,409 67,758
SEGS VII 1988 Kramer Jct. 30 194,280 70,138 65,048
SEGS VIII 1989 Harper Lake 80 464,340 139,174 137,990
SEGS IX 1990 Harper Lake 80 483,960 141,916 125,036

Sources: 3   4   5   6  


References

1. Kramer Junction Solar Electric Generating Station, clui.org, [cached]
2. About Parabolic Trough Solar, theFraserDomain.typepad.com, 10/3/2005 [cached]
3. Solargenix Energy: Natural Power for Good, ieee.org,
4. An overview of the Kramer Junction SEGS recent performance, NREL.gov, 1999
5. Parabolic trough technology overview, ORNL.gov,
6. Solar Trough Power Plants, OSTI.gov,