Pompage-turbinagethumb|Installation de pompage-turbinage du , près de Herdecke, en Allemagne. Elle a été inaugurée en 1930. Le pompage-turbinage est une technique de stockage de l'énergie électrique qui consiste à remonter de l'eau d'un cours d'eau ou d'un bassin, pour la stocker dans des bassins d'accumulation, lorsque la production d'électricité est supérieure à la demande — c'est le pompage —, puis de turbiner l'eau ainsi mise en réserve pour produire de l'énergie électrique lorsque la demande est forte — c'est le turbinage.
Energy supplyEnergy supply is the delivery of fuels or transformed fuels to point of consumption. It potentially encompasses the extraction, transmission, generation, distribution and storage of fuels. It is also sometimes called energy flow. This supply of energy can be disrupted by several factors, including imposition of higher energy prices due to action by OPEC or other cartel, cum, political disputes, economic disputes, or physical damage to the energy infrastructure due to terrorism.
Control (management)Control is a function of management that helps to check errors and take corrective actions. This is done to minimize deviation from standards and ensure that the stated goals of the organization are achieved in a desired manner. According to modern concepts, control is a foreseeing action; earlier concepts of control were only used when errors were detected. Control in management includes setting standards, measuring actual performance, and taking corrective action in decision making.
Mains humMains hum, electric hum, cycle hum, or power line hum is a sound associated with alternating current which is twice the frequency of the mains electricity. The fundamental frequency of this sound is usually double that of fundamental 50/60Hz, i.e.100/120Hz, depending on the local power-line frequency. The sound often has heavy harmonic content above 50/60Hz. Because of the presence of mains current in mains-powered audio equipment as well as ubiquitous AC electromagnetic fields from nearby appliances and wiring, 50/60Hz electrical noise can get into audio systems, and is heard as mains hum from their speakers.
Energy lawEnergy laws govern the use and taxation of energy, both renewable and non-renewable. These laws are the primary authorities (such as caselaw, statutes, rules, regulations and edicts) related to energy. In contrast, energy policy refers to the policy and politics of energy. Energy law includes the legal provision for oil, gasoline, and "extraction taxes." The practice of energy law includes contracts for siting, extraction, licenses for the acquisition and ownership rights in oil and gas both under the soil before discovery and after its capture, and adjudication regarding those rights.
