external efficiency
11Energy conversion efficiency — Output energy is always lower than input energy …
12Quantum efficiency — (QE) is a quantity defined for a photosensitive device such as photographic film or a charge coupled device (CCD) as the percentage of photons hitting the photoreactive surface that will produce an electron–hole pair [… …
13Energy efficiency in British housing — Domestic housing in the United Kingdom presents one of the major opportunities for achieving the 20% overall cut in UK carbon dioxide emissions targeted by the Government for 2010.Carbon emissionsAlthough carbon emissions from housing have… …
14Engine efficiency — of thermal engines is the relationship between the total energy contained in the fuel, and the amount of energy used to perform useful work. There are two classifications of thermal engines (1) Internal combustion (gasoline, diesel and gas… …
15Office of Energy Efficiency and Renewable Energy — The Office of Energy Efficiency and Renewable Energy (EERE) is an office within the United States Department of Energy that invests in high risk, high value research and development in the fields of energy efficiency and renewable energy… …
16Allocative efficiency — is a theoretical measure of the benefit or utility derived from a proposed or actual selection in the allocation or allotment of resources.[1][2] Although there are different standards of evaluation for the concept of allocative efficiency, the… …
17Quantum efficiency of a solar cell — Quantum efficiency (QE) is the ratio of the number of charge carriers collected by the solar cell to the number of photons of a given energy shining on the solar cell. QE therefore relates to the response of a solar cell to the various… …
18Seasonal energy efficiency ratio — The efficiency of air conditioners is often rated by the Seasonal Energy Efficiency Ratio (SEER) which is defined by the [Air Conditioning, Heating, and Refrigeration Institute] in its standard ARI 210=240, Performance Rating of Unitary Air… …
19Fuel efficiency in transportation — This page describes fuel efficiency in means of transportation. For the environmental impact assessment of a given product or service throughout its lifespan, see life cycle assessment. Caveats Comparing Fuel efficiency in transportation is a bit …
20Northwest Energy Efficiency Alliance — The Northwest Energy Efficiency Alliance (NEEA) is a non profit organization working to maximize energy efficiency in the Pacific Northwest through the acceleration and adoption of energy efficient products, services and practices. NEEA is… …
