Tag Archives: renewable energy

wind and solar

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Here are some fun facts on the wind and solar revolution.

Rooftop solar is growing worldwide by 50% per year. In 1985 solar cost $12 per watt, but today’s prices are closer to 36 cents per watt. Every five hours the world adds 23 MW of solar—which was the global installed capacity in 1985.

In January of 2014 Denmark got 62% of its electricity from wind. In 2013 Ireland got 17% of its electricity from wind, and Spain and Portugal both exceeded 20% from wind. Today China gets more electricity from wind (91,000 MW) than it does from nuclear reactors. The United States is second in the world in installed wind turbines, with South Dakota and Iowa obtaining over 26% of their electricity from wind…

The renewable energy revolution will enable civilization to stop the growth of highly polluting fossil fuels. It will enable society to leave the majority of the remaining reserves of fossil fuels alone and unburned. Acceleration of this revolution helps in solving many problems and is a key to restoring and maintaining the life support systems of the earth.

alternative energy

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This article (in the descriptively name journal Energy) describes how California could move to an all-renewable energy future, then tries to put an economic value on that. It is always the link between air pollution and health that surprises me. Why don’t people get more upset that power plants and vehicle exhaust are literally taking years off all our lives when there are other alternatives out there?

This study presents a roadmap for converting California’s all-purpose (electricity, transportation, heating/cooling, and industry) energy infrastructure to one derived entirely from wind, water, and sunlight (WWS) generating electricity and electrolytic hydrogen. California’s available WWS resources are first evaluated. A mix of WWS generators is then proposed to match projected 2050 electric power demand after all sectors have been electrified. The plan contemplates all new energy from WWS by 2020, 80–85% of existing energy converted by 2030, and 100% by 2050. Electrification plus modest efficiency measures may reduce California’s end-use power demand ∼44% and stabilize energy prices since WWS fuel costs are zero. Several methods discussed should help generation to match demand. A complete conversion in California by 2050 is estimated to create ∼220,000 more 40-year jobs than lost, eliminate ∼12,500 (3800–23,200) state air-pollution premature mortalities/yr, avoid $103 (31–232) billion/yr in health costs, representing 4.9 (1.5–11.2)% of California’s 2012 gross domestic product, and reduce California’s 2050 global climate cost contribution by $48 billion/yr. The California air-pollution health plus global climate cost benefits from eliminating California emissions could equal the $1.1 trillion installation cost of 603 GW of new power needed for a 100% all-purpose WWS system within ∼7 (4–14) years.