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The energy factor metric only applies to residential water heaters, which are currently defined by fuel, type, and input capacity. [5] Generally, the EF number represents the thermal efficiency of the water heater as a percentage, since it is an average of the ratio of the theoretical heat required to raise the temperature of water drawn to the amount of energy actually consumed by the water ...
Electric and magnetic fields can store energy and its density relates to the strength of the fields within a given volume. This (volumetric) energy density is given by u = ε 2 E 2 + 1 2 μ B 2 {\displaystyle u={\frac {\varepsilon }{2}}\mathbf {E} ^{2}+{\frac {1}{2\mu }}\mathbf {B} ^{2}} where E is the electric field , B is the magnetic field ...
The energy content of ethanol is 76,100 BTU/US gal (5.89 kilowatt-hours per litre), compared to 114,100 BTU/US gal (8.83 kWh/L) for gasoline. (see chart above) A flex-fuel vehicle will experience about 76% of the fuel mileage MPG when using E85 (85% ethanol) products as compared to 100% gasoline.
The following table compares official EPA ratings for fuel economy (in miles per gallon gasoline equivalent, mpg-e or MPGe, for plug-in electric vehicles) for series production all-electric passenger vehicles rated by the EPA for model years 2015, [48] 2016, [49] 2017, [50] and 2023 [51] versus the model year 2016 vehicles that were rated the ...
Renewable energy in the United States accounted for 12.5% of the total production in 2021, [22] and 20.7% of electric generation. [38] The category has seen rapid growth, doubling in total output between 2000 and 2020. They have exceeded nuclear since 2011 and surpassed coal in 2020 for the first time since wood fuel fell out of use. [22]
The following table compares official EPA ratings for fuel economy (in miles per gallon gasoline equivalent, mpg-e or MPGe, for plug-in electric vehicles) for series production all-electric passenger vehicles rated by the EPA for model years 2015, [1] 2016, [2] 2017, [3] and 2023 [4] versus the model year 2016 vehicles that were rated the most efficient by the EPA with plug-in hybrid ...
In early 2020 the gas price has dropped down to a national average of $1.73 a gallon. [11] In 2021, the average price increased to $3.01/gallon. [12] By the end of June 2022, the price of gasoline reached a record high of over $5/gallon with some places reporting $6/gallon. [13]
The average fuel economy for all vehicles on the road is higher in Europe than the United States because the higher cost of fuel changes consumer behaviour. In the UK, a gallon of gas without tax would cost US$1.97, but with taxes cost US$6.06 in 2005. The average cost in the United States was US$2.61. [21]
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