Tag Archives: output

Output per miner-hour rises as smaller coal mines close

September 3, 2015 Source: U.S. Energy Information Administration, , and Mine Safety and Health Administration Coal mining productivity increased in 2013, averaging 5.5 short tons per miner hour, reversing a trend of declining productivity since at least 2000. Preliminary data from the Mine Safety and Health Administration indicate a further increase in 2014. Improved productivity […]

California’s continued drought, reduced snowpack mean lower hydropower output

April 9, 2015 Source: U.S. Department of Agriculture Updated at 9:20 a.m. to include the most recent drought information from California, released this morning. Earlier this month, California Governor Jerry Brown enacted mandatory water restrictions for the first time in the state’s history. While the executive order doesn’t directly address hydropower generation and instead focuses […]

Solar photovoltaic output depends on orientation, tilt, and tracking

November 19, 2014 Source: EIA, based on National Renewable Energy Laboratory’s , using default input values except as noted Note: Tilted systems are assumed to be mounted with a 20-degree tilt from horizontal. The assumed system size is one kilowatt of direct current, with output in watthours of alternating current. Financial incentives, renewable portfolio standards, […]

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