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The energy input might be rendered in several different types depending on the type of propulsion, and normally such energy is presented in liquid fuels, electrical energy or food energy. [ 9 ] [ 10 ] The energy efficiency is also occasionally known as energy intensity . [ 11 ]
In 1995 the USDA released a report stating that the net energy balance of corn ethanol in the United States was an average of 1.24. It was previously considered to have a negative net energy balance. However, due to increases in corn crop yield and more efficient farming practices corn ethanol had gained energy efficiency. [3]
The U.S. Department of Energy's Fuel Cell Technology Program states that, as of 2011, fuel cells achieved 53–59% efficiency at one-quarter power and 42–53% vehicle efficiency at full power, [106] and a durability of over 120,000 km (75,000 miles) with less than 10% degradation. [107]
The National Energy Technology Laboratory (NETL) is a U.S. national laboratory under the Department of Energy Office of Fossil Energy. [1] NETL focuses on applied research for the clean production and use of domestic energy resources.
Fossil fuel phase-out is the gradual reduction of the use and production of fossil fuels to zero, to reduce air pollution, limit climate change, and strengthen energy independence. It is part of the ongoing renewable energy transition , but is being hindered by fossil fuel subsidies .
The only national laboratory solely dedicated to energy efficiency and renewable energy, NREL helps its industry partners create innovative components, fuels, infrastructure, and integrated systems for battery electric, fuel cell, and other alternative fuel on-road, off-road, and non-road vehicles, including emerging technologies for aviation ...
For fossil fuels the free enthalpy of reaction is usually only slightly less than the enthalpy of reaction so from equations and we can see that the energy efficiency will be correspondingly larger than the energy law efficiency. For example, a typical combined cycle power plant burning methane may have an energy efficiency of 55%, while its ...
The use of fossil fuels in the 18th and 19th century set the stage for the Industrial Revolution. Fossil fuels make up the bulk of the world's current primary energy sources. In 2005, 81% of the world's energy needs was met from fossil sources. [3] The technology and infrastructure for the use of fossil fuels already exist.