expended energy

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• Energy harvesting — (also known as Power harvesting or energy scavenging ) is the process by which energy is captured and stored. Frequently this term is applied when speaking about small autonomous devices, like those used in sensor networks. A variety of different …   Wikipedia

• Energy returned on energy invested — Contents 1 Non manmade energy inputs 2 Relationship to net energy gain 3 The economic influence of EROEI …   Wikipedia

• energy 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 …   Universalium

• Energy Return On Investment - EROI — The amount of energy that has to be expended in order to produce a certain amount of energy. The energy return on investment (EROI) is a key determinant of the price of energy, as sources of energy that can be tapped relatively cheaply will allow …   Investment dictionary

• Kinetic energy — The kinetic energy of an object is the extra energy which it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its current velocity . Having gained this energy during its acceleration …   Wikipedia

• Orders of magnitude (energy) — Different orders of magnitude of natural energy production for solar, wind and geothermal versus average global consumption rate (1 W = 1 J/s) This list compares various energies in joules (J), organized by order of magnitude. List of orders of… …   Wikipedia

• List of energy topics — This is a list of energy topics which identifies articles and categories that relate to energy in general. Energy refers to the ability to do work . The word is used in several different contexts. The engineering use has a precise, well defined… …   Wikipedia

• The Law of Conservation of Energy —     The Law of Conservation of Energy     † Catholic Encyclopedia ► The Law of Conservation of Energy     Amongst the gravest objections raised by the progress of modern science against Theism, the possibility of Miracles, free will, the… …   Catholic encyclopedia

• Outline of energy — See also: Index of energy articles In physics, energy (from the Greek ἐνέργεια – energeia, activity, operation , from ἐνεργός – energos, active, working [1]) is a scalar physical quantity that describes the amount of work that can be performed by …   Wikipedia

• Net 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 …   Wikipedia

• National Energy Technology Laboratory — The National Energy Technology Laboratory (NETL) is a science, technology, and energy laboratory owned and operated by the U.S. Department of Energy (DOE). As part of DOE s national laboratory system, NETL supports DOE s mission to advance the… …   Wikipedia