A roundup of a few stories that came out this week that I found particularly interesting.
- Solyndra, a startup in Fremont, CA (just down the street from my office), is using a new form factor for thin film solar cells:
Unlike conventional solar panels, which are made of flat solar cells, the new panels comprise rows of cylindrical solar cells made of a thin film of semiconductor material. The material is made of copper, indium, gallium, and selenium. To make the cells, the company deposits the semiconductor material on a glass tube. That’s then encapsulated within another glass tube with electrical connections that resemble those on fluorescent lightbulbs. The new shape allows the system to absorb more light over the course of a day than conventional solar panels do, and therefore generate more power.
Not only do they not need trackers, but because they are mounted with space between each tube, they aren’t susceptible to wind and they can collect light reflected off the building’s roof and ambient light coming in obliquely.
What I like about this story is that it shows that there’s still a lot more innovation to be done in all areas of alternative energy design – yesterday I saw another report about a new fuel cell membrane made of a cheap material instead of platinum, and there’s practically a new wind energy device every week. They’re not all going to be winners, but it’s the kind of design ferment that’s going to lead to big cost and practicality improvements in every area.
- The EPA provides an interactive analysis (using Google Earth) of marginal and contaminated land that could be used for renewable energy farms – wind and/or solar:
According to the EPA, many lands tracked by the agency, such as large Superfund sites, and mining sites offer thousands of acres of land, and may be situated in areas where the presence of wind and solar structures are less likely to be met with aesthetic, and therefore political, opposition.
One stumbling block for a massive transition to solar power in the U.S. has been the land use question. I’m not saying we want to build our power on contaminated lands, but it’s interesting to see this as an option.
- Renault commits to electric vehicles. Saying that:
“EVs are a necessity because hybrids cannot deliver the level of gasoline use and emissions reductions that governments and customers are demanding of automakers”
Renault unveiled two zero-emission concept cars at the Paris autoshow Mondiale de l’Automobile, both of which are pure electric. The cars have a range of 160-200 kilometers (95-120 miles) and are designed for day-to-day use and short weekend trips, “not vacations” as Renault admits.
Renault is committing to EVs because they believe that’s the only they’ll be able to deliver the gasoline economy and emissions reductions being demanded by both the market and governments.
These stories caught my eye as not just “more of the same” this week. What green energy stories got your interest up recently?