### device | machine | motor | engine | turbine:

Wind turbine
* All wind turbines track the wind.
* Most wind turbines are horizontal-axis propeller type systems.
* Most wind turbines convert energy
  - designed for battery charging come with a regulator to prevent overcharge
* Most wind turbines generate electricity from naturally occurring wind
* Most wind turbines have brakes
  - look like airplane propellers mounted on towers
* Most wind turbines make electricity
  - enough electricity
* Most wind turbines produce electricity
* Most wind turbines provide electricity
  - run at almost constant speed with direct grid connection
* Most wind turbines use generators with four or six poles
* Some wind turbines change energy
  - have a vertical axis
  - produce as much as three times their rated power during gusts
* are Denmark's fourth largest export commodity
  - a great way to get energy without pollution
  - affected by wind shear
  - also visible for great distances on certain landscapes
  - designed to exploit the wind energy that exists at a location
  - effectively just electric generators with a propeller on the front
  - essentially pollution-free, except for the manufacturing process
  - eye-catching new elements or landmarks on the landscape
  - good energy producers, but poor demand reducers
  - limited to the lowest few metres of the atmosphere
  - machines that change the energy in wind into mechanical or electrical energy
  - manufactured in a wide range of vertical and horizontal axis types
  - most economical where the energy charges are high
  - non-polluting and are driven entirely by nature's forces
* are now among the most cost-effective ways of generating renewable energy
  - utility-grade power generation systems rather than experimental devices
  - part of wind farms
  - popular with people in Denmark
  - very useful in almost any marine or household electrical system
* can be very big
  - now provide over half of our electricity and reduce global warming and pollution
  - stand alone or be part of large wind farms
* capture the energy of the wind to produce electricity
  - kinetic energy of wind and convert it into electricity
  - solar energy in wind and convert it into electricity
* change the kinetic energy of air molecules in wind into electricity.
* come in a number of different types.
* convert kinetic energy into mechanical power
  - mechanical energy of the wind to produce electrical energy
* convert the kinetic energy in the wind into mechanical power
  - of wind energy into mechanical power
  - mechanical energy from the wind into electrical energy
  - wind energy to electricity for distribution
* do occupy more land than other energy technologies
  - use chemical energy in one way though
* generate electricity in Palm Springs, California
  - power at high cost to electric consumers
* harness the power of the wind with spinning rotors that drive electrical generators.
* make electricity by operating the opposite of a fan
* operate in fluctuating, relatively slowly moving air currents
  - on a simple principle
* produce a lot of noise.
* produce electricity by using the natural power of the wind to drive a generator
  - with no pollution
  - no air emissions or greenhouse gases
  - the lowest-quality electricity on the planet
* require assemblies.
* tend to vibrate and transmit the vibration to the structure on which they are mounted.
* turn generators producing energy.
* use only the energy from the moving air to generate electricity
  - stall to control power output of a system
* use the same principles of physics as airplanes
  - wind to drive turbines directly
* use wind flows to generate electricity
  - to turn the turbine
* vary greatly in size, and the installed price is in direct proportion to size.
  * Most wind turbines generate electricity from naturally occurring wind. Solar updraft towers use wind that is artificially produced inside the chimney by heating it with sunlight.
+ Wind power in Denmark: Denmark :: Wind farms