By now, you’ve heard it in a thousand political speeches—the shopping-list-style recitation of newfangled-sounding alternative energy sources and technologies. Clean coal! Solar and wind! Switch grass!
Yet few people take the trouble to examine the energy technology field as a whole, comparing a cross-section of future sources across the same set of objective criteria, especially price. The following is reason’s attempt to rectify this gap, giving consumer and policymaker alike a quick guide to alternative energy.
Supercritical pulverized coal
Pulverizing coal is the predominant method for generating electricity in the U.S. and around the world. In a pulverization plant, coal, after being ground to the texture of flour, is blown into a furnace to burn. This converts circulating water into steam, which turns the blades of a turbine to produce electricity. “Supercritical” units heat up to 1,000 degrees Fahrenheit and make steam at 3,600 pounds per square inch.
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