Rate of wind movement in distance per unit time.

Category:Meteorology

A graph that indicates the distribution of wind speeds as a function of the cumulative number of hours that the wind speed exceeds a given wind speed in a year.

Category:Energy Terms

A curve that indicates the number of hours per year that specific wind speeds occur.

Category:Energy Terms

A profile of how the wind speed changes with height above the surface of the ground or water.

Category:Energy Terms

A term used for a wind energy conversion device that produces electricity; typically having one, two, or three blades.

Category:Energy Terms

The amount of power a wind turbine can produce at its rated wind speed, e.g., 100 kW at 20 mph. The rated wind speed generally corresponds to the point at which the conversion efficiency is near its maximum. Because of the variability of the wind, the amo ...

Category:Energy Terms

An instrument used to indicate wind direction.

Category:Meteorology

A component of the wind (often using Cartesian coordinates. i.e. X and Y wind vectors). Also, an arrow representing wind velocity, drawn to point in the direction of the wind and with a length proportional to wind speed.

Category:Meteorology

The wind speed and direction in an undisturbed flow.

Category:Energy Terms

A vector term which includes both wind speed and wind direction.

Category:Meteorology

An anchor engine used for heaving in the chain cable and anchor.

Category:Sea Words

A machine designed to drop and hoist the anchor. It has one or more cable lifters mounted on a horizontal shaft, each being fitted with a brake. The cable lifters are capable of being declutched from the prime mover. One or two warping ends may also be fi ...

Category:Technical Terms

A WECS that is used to grind grain, and that typically has a high-solidity rotor; commonly used to refer to all types of WECS.

Category:Energy Terms

A rotation anemometer in which the axis of rotation is horizontal. The instrument has either flat vanes (as in the air meter) or helicoidal vanes (as in the propeller anemometer). The relation between wind speed and angular rotation is almost linear.

Category:Meteorology

A generic term for a glazed opening that allows daylight to enter into a building and can be opened for ventilation.

Category:Energy Terms

A graph representing the relationship between the power available from the wind and the wind speed. The power from the wind increases proportionally with the cube of the wind speed.

Category:Energy Terms

The change in the power available in the wind due to changes in the windspeed or velocity profile; the windpower profile is proportional to the cube of the wind speed profile.

Category:Energy Terms

The wind speed and direction at various levels in the atmosphere above the level reached by surface weather observations.

Category:Meteorology

The measurement and computation of wind speeds and directions at various levels above the surface of the earth. Methods include pilot balloon observations, rabals, rawin or rawinsonde observations, radar tracking, or acoustic sounding.

Category:Meteorology

A graphical aid used in the reduction of data from a winds aloft observation.

Category:Meteorology