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APESCH20
| Term | Definition |
|---|---|
| Active solar systems | a mechanical system that actively collects, concentrates, and stores solar energy |
| Amorphous silicon collectors | photovaltic cells that collect solar energy and convert it to electricity using noncrystalline (randomly arranged) thin films of silicon |
| Biofuels | fuels such as ethanol, methanol, or vegetable oils from crops |
| Cellulosic | material composed primarily of cellulose |
| Cogeneration | the simultaneous production of electricity and steam or hot water in the same plant |
| Energy crops | crops that can be used to make ethanol or diesel fuel |
| Energy efficiency | a measure of energy produced compared to energy consumed |
| Flex-fuel vehicles | vehicles that can burn variable mixtures of gasoline and ethanol |
| Fuel cells | mechanical devices that use hydrogen or hydrogen-containing fuel such as methane to produce and electric current. Fuel cells are clean, quiet, and highy efficient sources of electricity |
| Geothermal energy | energy drawn from the internal heat of the earth, either through geysers, fumaroles, hot springs, or other natural geothermal features, or through deep wells that pump heated groundwater |
| Green pricing | setting prices to encourage conservation or renewable energy. Plans that invite customers to pay a premium for energy from renewable sources |
| Hybrid gasoline electric engines | a small gasoline engine generates electricity that is stored in batteries and powers electric motors that drive vehicle wheels |
| Low-head hydropower | small-scale hydro technology that can extract energy from small headwater dams; causes much less ecological damage |
| Low-input high-diversity biofuels | mixed polycultures of perennial native species that don't require minimal amounts of cultivation, fertilizer, irrigation, or pesticides when grown as energy crops |
| Micro-hydrogen generators | small power generators that can be used in low-level rivers to provide economical power fo four to six homes, freeing them from dependence on large utilities and foreign energy supplies |
| Ocean thermal electric conversion | energy derived from temperature differentials between warm ocean surface waters and cold deep waters. This differential can be used to drive turbines attached to electric generators |
| Passive heat absorption | the use of naturalmaterials or absorptive structures without moving parts to gather and hold heat; the simplest and oldest use of solar energy |
| Photovoltaic cells | an energy-conversion device that captures solar energy and directly converts it to electrical current |
| Plug-in hybrids | vehicles with hybrid gasoline electric engines adapted with a larger battery array and a plug-in to recharge the batteries from a standard electric outlet |
| Reformer | a device that strips hydrogen from fuels such as natural gas, methanol, ammonia, gasoline, or vegetable oil so they can be used in a fuel cell |
| Run-of-the-river flow | ordinary river flow not accelerated by dams, flumes, etc. Some small, modern, high-efficiency turbines can generate useful power with run-of-the-river flow or with a current of only a few kilometers per hour |
Created by:
AlanaR
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