performance energy ratio
1Energy quality — the contrast between different forms of energy, the different trophic levels in ecological systems and the propensity of energy to convert from one form to another. The concept refers to our empirical experience of the characteristics, or qualia …
2energy conversion — ▪ technology Introduction the transformation of energy from forms provided by nature to forms that can be used by humans. Over the centuries a wide array of devices and systems has been developed for this purpose. Some of these energy …
3Coefficient of Performance — (COP) A ratio of the work or useful energy output of a system versus the amount of work or energy inputted into the system as determined by using the same energy equivalents for energy in and out. Is used as a measure of the steady state… …
4Energy policy of the United Kingdom — For energy use in practice, see Energy use and conservation in the United Kingdom The current Energy Policy of the United Kingdom is set out in the Energy White Paper of May 2007, building on previous work including the 2003 Energy White Paper… …
5Performance-enhancing drugs — Part of a series on Doping in sport …
6Seasonal energy efficiency ratio — (SEER) Ratio of the cooling output divided by the power consumption. It is the Btu of cooling output during its normal annual usage divided by the total electric energy input in watt hours during the same period. This is a measure of the… …
7Seasonal Performance Factor — (SPF) Ratio of useful energy output of a device to the energy input, averaged over an entire heating season …
8Net energy gain — See also: EROEI Net Energy Gain (NEG) is a concept used in energy economics that refers to the difference between the energy expended to harvest an energy source and the amount of energy gained from that harvest.[1] The net energy gain, which can …
9Efficient energy use — Energy efficiency redirects here. For energy efficiency as a ratio in physics, see Energy conversion efficiency. Efficient energy use, sometimes simply called energy efficiency, is using less energy to provide the same level of energy service. An …
10Jet engine performance — This article describes how jet engine performance is estimated during the design phase. Similar techniques are used once the engine has been built and is being tested, except the performance of individual components, rather than being assumed, is …
