Wind energy

Wind energy

Industry: Energy

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Wind energy

Doppler shift principle

Energy; Wind energy

When a source generating waves moves relative to an observer, or when an observer moves relative to a source, there is an apparent shift in frequency. If the distance between the observer and the ...

Doubly fed induction generator (DFIG)

Is an electrical machine concept in which variable-speed operation is provided by using a relatively small power electronic converter to control currents in the rotor, such that the rotor does not ...

DTI:

Energy; Wind energy

Former Department of Trade and Industry of the UK Government, now Department of Business, Enterprise and Regulatory Reform (BERR).

Electricity demand

Energy; Wind energy

Is the total electricity consumption in GWh consumed by a nation annually.

Emissions

Energy; Wind energy

Are the discharges of pollutants into the atmosphere from stationary sources such as smokestacks, other vents, surface areas of commercial or industrial facilities, and mobile sources such as motor ...

Energy payback

Energy; Wind energy

Is the time period it takes for a wind turbine to generate as much energy as is required to produce the turbine in the first place, instal it, maintain it throughout its lifetime and, finally, scrap ...

Equivalent sound level (dBLeq)

Energy; Wind energy

Quantifies the environmental noise as a single value of sound level for any desired duration. The environmental sounds are usually described in terms of an average level that has the same acoustical ...