Pacific Gas and Electric on Monday announced that it signed a 177-megawatt solar thermal power purchasing agreement with Ausra.
According to John O'Donnell, Ausra's executive vice president, the twenty-year agreement will generate over $1 billion in revenue for the Palo Alto, California-based start-up.
The plant will be located in
PG&E supplies 12 percent of its energy from renewable sources, said Keely Wachs, PG&E’s environmental communications manager.
“PG&E continues to aggressively add renewable electric power resources” to its supply and the company is confident that it will meet or exceed its 20 percent renewable energy goal by 2010, he said.
Proving that bigger isn’t always better, the plant will use only one square mile of land and will burn no fuel, use minimal water, and have no air or water emissions.
Ausra’s Compact Linear Fresnel Reflector (CLFR) solar technology utilizes the heat from the sun’s rays to create steam. Solar collectors boil water at high temperatures to power steam turbine generators.
Because Ausra’s flat mirrors–called Fresnel reflectors–are never more than eight feet off the ground, they cast shorter shadows that allow them to be built close together. This means Ausra only needs 2-2.5 acres of land per megawatt compared with 5 acres per megawatt for solar trough systems or 7 acres per megawatt for solar dish engine systems, Mr. O’Donnell said.
Compared with other power purchase agreements in
According to Mr. Wachs, PG&E’s 553-megawatt power purchase agreement with Solel-MSP-1, a subsidiary of Israel-based Solel Thermal Systems, in July is the single largest solar commitment in the world right now.
PG&E has also entered an agreement with Oakland, California-based BrightSource Energy for a 500-megawatt plan to be announced soon.
Although these agreements dwarf the deal with Ausra, New Energy Finance analyst Nathaniel Bullard said that Ausra is well-positioned.