direct energy
51Direct-Gain — The process by which sunlight directly enters a building through the windows and is absorbed and stored in massive floors or walls …
52Direct access — The ability of a retail customer to purchase commodity electricity directly from the wholesale market rather than through a local distribution utility. (See also Retail Competition) …
53Direct Beam Radiation — Solar radiation that arrives in a straight line from the sun …
54Direct insolation — Sunlight falling directly upon a collector. Opposite of diffuse insolation. Solar Electric Glossary …
55Direct Water Heater — A type of water heater in which heated water is stored within the tank. Hot water is released from the top of the tank when a hot water faucet is turned. This water is replaced with cold water that flows into the tank and down to just above the …
56Direct and indirect band gaps — In semiconductor physics, the band gap of a semiconductor is always one of two types, a direct band gap or an indirect band gap. The band gap is called direct if the momentum of electrons and holes is the same in both the conduction band and the… …
57Energy policy of Australia — The Energy policy of Australia is subject to regulation and fiscal influence by all three levels of Government, however State and Federal energy policy deals with primary industries, such as coal. Australia is a major exporter and user of coal,… …
58Energy — This article is about the scalar physical quantity. For other uses, see Energy (disambiguation). Energetic redirects here. For other uses, see Energetic (disambiguation) …
59Direct exchange geothermal heat pump — A direct exchange (DX) geothermal heat pump system is a geothermal heat pump system in which the refrigerant circulates through copper tubing placed in the ground. The refrigerant exchanges heat directly with the soil through the walls of the… …
60Energy conservation — This article is about decreasing energy consumption. For the law of conservation of energy in physics, see Conservation of energy. Sustainable energy …
