Unique plant in San Antonio converts CO2 to minerals and chemicals. Photo: Skyonic
XPRIZE—the organization behind grand technology challenges such as the race to space won in 2004 by SpaceShipOne and current contests to land a Lunar rover and a Star Trek-style medical tricorder—unveiled a competition today that tackles a more mundane yet critical challenge: transforming carbon dioxide emissions from power plants into saleable products to help slow or reverse climate change. The competition’s $20 million kitty has been raised from major carbon emitters: a coalition of oil and gas producers producing high-carbon oil from Alberta’s oilsands, and New Jersey-based electric utility NRG Energy. Continue reading →
Time to toot my horn. The Society of Environmental Journalists has honoured my work in their 2015 Awards for Reporting on the Environment. I took first place in Outstanding Beat Reporting, Large Market, for “History, Technology, Politics and Impact of Solar Power” — a series of articles published in MIT Technology Review and IEEE Spectrum magazines:
The percentage of population with grid access declined in many of the 20 least-electrified nations between 2010 & 2012. Image: SE4ALL
Distributed energy solutions, such as rooftop solar, should be the electrification solution for the 1.1 billion people who are not plugged into a national power grid, not just a stopgap measure. That is the message from a new global industry group, Power for All, launched in New York City this week amidst the latest gathering of the United Nations’ universal energy access program.
Power For All brings together businesses and not-for-profit organizations that distribute off-grid solutions, including solar-LED lights and home power systems. Founding members include San Francisco-based d.light; Arusha, Tanzania-based Off Grid Electric; and London-based NGO SolarAid—owner of solar-LED light global market leader SunnyMoney, which sold 650,000 lights last year.
Their message is that bottom-up distributed energy solutions should be thepreferred solution for assuring universal access to electricity because they are faster, cleaner, and cheaper than extending power grids to rugged or sparsely-populated regions.
Hawaii’s legislature voted yesterday to stake the state’s future on renewable energy. According to House Bill 623, the archipelago’s power grids must deliver 100 percent renewable electricity by the end of 2045. If the compromise bill is signed by the governor as expected, Hawaii will become the first U.S. state to set a date for the total decarbonization of its power supply.
That last jump could be difficult, says Peter Crouch, a power grid simulation expert and dean of engineering at the University of Hawaii’s flagship Manoa campus. “Today I don’t know whether we can do it,” he says. Continue reading →
Nuclear power plants’ reactor pressure vessels (RPVs)—the massive steel jars that hold a nuclear plant’s fissioning fuel—face incessant abuse from their radioactive contents. And they must be built with extra toughness to withstand pressure and temperature swings in the event of a loss-of-cooling accident like the one that occurred at Fukushima in 2011. As the triple meltdowns at Fukushima Daiichi showed, the next layer of defense against a nuclear release—the so-called containment vessels—can not be counted on to actually contain molten nuclear fuel that breaches the RPV.
Nuclear safety authorities have recently discovered weaknesses in several RPVs, and their contrasting responses suggest that the ultimate lessons from Fukushima are still sinking into international nuclear power culture—especially in the United States, where the Nuclear Regulatory Commission (NRC) is resisting calls to mandate tougher inspection of RPVs. Continue reading →
Adding energy storage to sites with rooftop solar power generation offers a range of potential benefits. A battery can help smooth out solar’s inherently variable supply of power to the local grid, and even keep buildings powered during blackouts. Consequently, power-conversion innovators are developing a host of new products designed to reduce the cost and improve the efficiency of integrated solar-storage systems.
According to Vic Shao, CEO for the Santa Clara, California-based energy storage startup Green Charge Networks, tightly integrating storage with photovoltaics in some key states—including Hawaii and California—runs afoul of the “net metering” rules by which PV owners earn lucrative retail rates for the surplus power they feed to the grid. Adding storage can disqualify solar systems for net metering, in which utilities can pay their owners wholesale power rates that are several times lower than retail. “That is obviously a pretty big problem for anybody considering solar. That could kill a lot of projects,” says Shao. Continue reading →