Looking Breakthrough Ideas in Green Technology, Google Plans New Mirror For Cheaper Solar Power

Google Inc is disappointed with the lack of breakthrough investment ideas in the green technology sector but the company is working to develop its own new mirror technology that could reduce the cost of building solar thermal plants by a quarter or more.

"We've been looking at very unusual materials for the mirrors both for the reflective surface as well as the substrate that the mirror is mounted on," the company's green energy czar Bill Weihl told Reuters Global Climate and Alternative Energy Summit in San Francisco on Wednesday.

Google, known for its Internet search engine, in late 2007 said it would invest in companies and do research of its own to produce affordable renewable energy within a few years.

The company's engineers have been focused on solar thermal technology, in which the sun's energy is used to heat up a substance that produces steam to turn a turbine. Mirrors focus the sun's rays on the heated substance.

Google hopes to have a viable technology to show internally in a couple of months, Weihl said. It will need to do accelerated testing to show the impact of decades of wear on the new mirrors in desert conditions.

Another technology that Google is working on is gas turbines that would run on solar power rather than natural gas, an idea that has the potential of further cutting the cost of electricity, Weihl said.

"In two to three years we could be demonstrating a significant scale pilot system that would generate a lot of power and would be clearly mass manufacturable at a cost that would give us a levelized cost of electricity that would be in the 5 cents or sub 5 cents a kilowatt hour range," Weihl said.

Google is invested in two solar thermal companies, eSolar and BrightSolar but is not working with these companies in developing the cheaper mirrors or turbines.

In wide-ranging remarks, Weihl also said the United States needs to raise government-backed research significantly, particularly in the very initial stages to encourage breakthrough ideas in the sector.

The company has pushed ahead in addressing climate change issues as a philanthropic effort through its Google.org arm.

Source : REUTERS