Tag Archives: WWS

100% renewable energy for U.S. by 2050

Here’s how to convert everything from air conditioners to trucks 300x170 End-Use U.S. Power Change over Time, in 100% clean and renewable wind, water, and sunlight (WWS) all-sector energy roadmaps for the 50 United States, by Mark Z. Jacobson et al., 27 May 2015 from fossil fuels to 100% renewable sun, wind, and water power by 2050, generating more jobs than would be lost from dirty energy, stopping tens of thousands of premature deaths from pollution, saving about 4% of U.S. GDP, plus saving $3.3 trillion worldwide climate change costs.

That’s 100% as in no coal, oil, natural gas, nuclear, or biomass, just clean solar, wind, and water power: 90% by 2035, 80% by 2030, and 25% by 2025. No new technology required: just existing solar, wind, and water power production with batteries and hydrogen fuel cells for transportation, plus huge efficiency savings both from using electricity directly and through other well-known techniques.

A cleaner, healthier world is within our reach. And when even the country’s most corrupt legislature can unanimously pass and the Georgia governor who took campaign funds from six pipeline companies can sign a solar financing law, while Georgia has already become the fastest-growing solar market in the country, renewable energy is producing the political will to get this done.

Stanford Report, 8 June 2015, Continue reading

Energy reliability: let’s do the study for Georgia

Which energy source is really more reliable? Nuclear, coal, or wind, water, and sun?

As Plant Vogtle and others have just demonstrated, nuclear power isn’t as reliable as we might have thought. Mark Z. Jacobson says we can generate reliable power from wind, water, and sunlight alone. Will that work in Georgia?

Elsevier’s policy of charging for peer-reviewed articles from scientific journals is controversial, and some people find $19.95 prohibitive to access Mark Z. Jacobson and Mark A. Delucchi’s Providing all global energy with wind, water, and solar power, Part I: Technologies, energy resources, quantities and areas of infrastructure, and materials from Energy Policy Volume 39, Issue 3, March 2011, Pages 1154-1169. Fortunately, the same authors wrote an earlier version for Scientific American, 26 October 2009, A Plan to Power 100 Percent of the Planet with Renewables: Wind, water and solar technologies can provide 100 percent of the world’s energy, eliminating all fossil fuels. Here’s how

A new infrastructure must provide energy on demand at least as reliably as the existing infrastructure. WWS technologies generally suffer less downtime than traditional sources. The average U.S. coal plant is offline 12.5 percent of the year for scheduled and unscheduled maintenance. Modern wind turbines have a down time of less than 2 percent on land and less than 5 percent at sea. Photovoltaic systems are also at less than 2 percent. Moreover, when an individual wind, solar or wave device is down, only a small fraction of production is affected; when a coal, nuclear or natural gas plant goes offline, a large chunk of generation is lost.
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How to power the world with Wind, Water, and Sun

…a new study just published in the journal Energy Policy states that the world can provide for all of its energy needs, including electric power, transportation, heating/cooling, etc using only wind, water, and solar (WWS) energy by the year 2030.
By water the study authors, Mark Z. Jacobson (pictured) Mark A. Delucch, mostly mean hydroelectric power, which would involve building more dams, with all their environmental problems. Still, it’s an interesting study demonstrating that true renewable energy could power the world: no coal, no oil, no nuclear.