Unit 6 test (module 34 - 35)
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A fuel derived from biological material that became fossilized millions of years ago.
Fossil fuel
An energy source with a finite supply, primarily the fossil fuels and nuclear fuels.
Nonrenewable energy resource
Fuel derived from radioactive materials that give off energy.
Nuclear fuel
What are the major sources of energy for the world?
oil, coal, peat, and natural gas
An energy source that is bought and sold.
commercial energy source
An energy source gathered by individuals for their own immediate needs.
Subsistence energy source
What energy source once dominated our energy supply?
wood and coal
what energy source has increased now?
natural gas
how would you determine energy by calculating the energy return on energy investment (EROEI)?
EROIE = Energy obtained from fuel ÷ Energy invested to obtain fuel
The ______ the value of EROIE, the more efficient the fuel.
larger
what did civilians use for their vehicles during WWII in Europe and Japan, due to severe shortages.
coal or wood
At what point of the process in energy extraction and use is energy lost?
At each stage of the process
what is 30% of the energy in the U.S. used for?
transportation
what is transportation primarily achieved through?
through the use of vehicles fueled by petroleum, such as gasoline and diesel
What can electricity be generated from?
fossil fuels, wind, water, etc
Something that can move and deliver energy in a convenient, usable form to end users.
Secondary energy source & Energy carrier
A device with blades that can be turned by water, wind, steam, or exhaust gas from combustion that turns a generator in an electricity-producing plant.
Turbine
A network of interconnected transmission lines that joins power plants together and links them with end users of electricity.
Electrical grid
how does a coal-fired electricity generation plant work?
Energy from coal combustion converts water into steam , which turns a turbine. The turbine turns a generator, which produces electricity.
A power plant that uses both exhaust gases and steam turbines to generate electricity.
combined cycle
In reference to an electricity-generating plant, the maximum electrical output.
capacity
The fraction of time a power plant operates in a year.
capacity factor
The use of a fuel to generate electricity and produce heat. Also known as Combined heat and power.
cogeneration
what improves the efficiency to as high as 90%?
cogeneration