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Estimated U.S. Energy Use in 2010: -98.0 Quads ■ Lawrence Livemore National Laboratory Net Clectricity Imports 0.01 Solar 0.11 8.44 12.71 Electricity Ceneration 1949 26.78 2.49 19.13 Energy 56.13 .95 2.36 0.92 Residential 11.79 0.35 0.10 .43 0.04 О.AZ 1.22 S.06 74 0.02 Natural Cas 24.65 8.71 .28 0.71 0.02 0.06 41.88 4,65 0.13 138 Coal 20.52 Industrial 2327 18.62 8.01 162 2.23 0.44 20.59 001 0.38 .68 Trans- 25.65 2745 5.86 A quad a unit of energy equal to 1015 Btu or 1.055 × 1018 joules (1055 exajoules or EJ). So how many exajoules were used in 2012. A quad is roughly equivalent to 36 million tonnes of coal (36 X 106). How much coal does the US use in energy in 2012?Estimated U.S. Energy Use in 2014: ~98.3 Quad:s Lawrence Livermore National Laboratory Net Electricity Imports 0.164 0.170 Solar 0.427 8.33 12.4 25.8 Nuclear 8.33 Electricity Generation 38.4 Rejected Energy 59.4 2.44 16.4 Hydro 2.47 4.12 4.79 1.73 Wind 1.73 Residential 11.8 0.159 0.252 7.66 0.0197 0.945 0.580 5.20 3.13 0.0197 4.63 Natural Gas 27.5 Commercial 8.93 5.81 Energy Services 38.9 3.55 0.561 0.0470 4.95 3.26 0.119 Coal 17.9 Industrial 24.7 19.8 8.16 1.51 2.30 0.507 21.4 0.0265 1.27 0.294 0.94 Trans- portation 27.1 24.8 Petroleum 34.8 5.68 Source: LLNL 2015. Data is based on DOE/EIA-0035(2015-03), March, 2014. If this information or a reproduction of it is used, credit must be given to the Lawrence Livermore National Laboratory and the Department of Energy, under whose auspices the work was performed. Distributed electricity represents only retail electricity sales and does not include self-generation. EIA reports consumption of renewable resources (i.e, hydro, wind, geothermal and solar) for electricity in BTU-equivalent values by assuming a typical fossil fuel plant heat rate. The efficiency of electricity production is calculated as the total retail electricity delivered divided by the primary energy input into electricity generation. End use efficiency is estimated as 65% for the residential and commercial sectors 80% for the industrial sector, and 21% for the transportation sector. Totals may not equal sum of components due to independent rounding LLhL-1-10, 27 A quad a unit of energy equal to 1015 Btu or 1.055 x 1018 joules (1.055 exajoules or EJ). So how many exajoules were used in 2014. A quad is roughly equivalent to 172.4 million US barrels(8 X 109). How much oil did the US use in 2014?Estimated U.S. Energy Consumption in 2017: 97.7 Quads Lawrence Livermore National Laboratory Net Electricity 0.6 Solar 0.48 12.5 8.42 Nuclear 8.42 0.15 37.2 24.7 2.75 Hydro 2.77 Rejected Energy 3.75 0.19 Residential 10.7 2.35 Wind 2.35 0.04 66.7 0.33 0.88 6.97 4.6 0.211 0.02 0.08 8.99 9.54 3.29 0.16 0.83 Natural Gas 28.0 0.02 3.23 9.84 0.01 Industrial 12.9 25.2 Energy 124 12.4 2.48 12.7 8.38 31.1 Coal 14.0 0.03 0.76 0.52 Biomass 4.91 22.2 1.43 25.9 28.1 0.21 5.91 36.2 Source: LINL April 2010-Data a based on DOE/ETA MER 20171 1E thia informat.lon or a reproduct.ion oft ia ued, credlt must be given to the lawrenoeLvemore Natlonal Laboratory and the Department of Energy, under whoseュusploeg the work was portorned. This chart was revised 1n 2017 to reflect changes note 1n mid-2016 to the Energy Information hhin1atrations analys1a met had, logy and reporting. The efficiency of lectricity production i휴 calculated as the total retail olectricity delivered divided by the primary onergy input int◇や1ectricity generation. End use efficiency 1界6stinated as 65% for thn residential pector, 65% for tho comercta1 ฮector. Z19 for the transportation sector, and ง98 for the industrial ector whäch as updated in 2017 to reflect Ds analyels of sanufactoring Totals nay not eqal m of cosponents die to independent rounding LINT-MT-11027 A quad a unit of energy equal to 1015 Btu or 1.055 x 1018 joules (1.055 exajoules or EJ) So how many exajoules were used for electric generation in 2012, 2014, 2016, 2017, and what percentage of energy for electricity generation was rejected energy? Has efficiency for electric generation improved from 2012 to 2017? Why?

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