| Term | Definition |
|---|
| Energy Efficiency | The percentage of total energy input into an energy conversion device or system that does useful work and is not converted to low-quality, essentially useless heat |
| Cogeneration Systems (Combined Heat and Power Systems) | Two useful forms of energy are produced from the same fuel source |
| Passive Solar Heating System | Absorbs and stores heat from the sun directly within a structure |
| Active Solar Heating System | Collectors absorb solar energy, and a fan or a pump supplies part of a building's space-heating or water-heating needs |
| Photovoltaic Cells (Solar Cells) | A transparent wafer that contains a semiconductor material |
| Biofuels | Gas or liquid fuels made from biomass |
| Geothermal Energy | Energy extracted from the earth's internal heat |
| Micropower Systems | Systems of small-scale decentralized units that generate 1-10,000 kilowats of electricity |
Combine with other sets
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