Providing distinct experiences designed to spark clinical inquiry and also creativity because 1933.

You are watching: What energy transformation occurs in a windmill

Learn more

Museum hoursOpen this day from 9:30 a.m. To 4:00 p.m.Museum hoursOpen tomorrow from 9:30 a.m. Come 4:00 p.m.5700 S Lake shore DriveChicago, IL 60637

Donate now

Build a wind generator to create electricity and explore energy transformation.

MaterialsThree PVC pipes, one about 30 centimeter long and also the others at least15 cmlongThree PVC T-jointsOne PVC elbow jointMotorWire (about two feet long)Wire cuttersWood dowelsMultimeterAlligator clipsScissorsTapeHair dryer or fanMaterials because that blades, such as balsa wood, aluminum foil, building paper, popsicle sticks, etc.


Insert a 15-cm PVC pipe into the middle hole that a PVC T-joint. Repeat with another 15-cm PVC pipe and T-joint. Join the two pieces with each other by inserting the totally free ends of the pipes right into the political parties of a third T-joint, through the center hole facing up.Insert the staying PVC pipe into the T-joint hole that is encountering up, so the the pipeline stands upright. Ar the final T-joint on the complimentary end the the tower.Attach 2 wires come the motor. Location the engine securely right into the share at the top of the tower. Run the wires under the tower pipe and out among the T-joints top top the base. If needed, usage duct tape to save the engine in ar securely.Attach the plastic, ring piece dubbed the hub to the straight, steel piece top top the external of the motor.Connect the wires come the multimeter utilizing the alligator clips. Collection the multimeter to 20 volts.Place a couple of small, wood dowels right into the holes of the hub. Develop wind utilizing a hair dryer or fan. Inspect the multimeter to see exactly how much power is generated.Using a variety of materials, style different knives for the wind turbine. Consider the weight, smoothness of surface and variety of blades needed. Connect the knives to the dowels making use of tape.Turn ~ above the hair dryer or pan again and also test the turbine with each type of blade you design. Exactly how does the electrical output differ? test the turbine with various wind speeds, such as low, medium and high fan settings. Go the wind speed influence the electrical energy output?

What"s happening?

As the kinetic mechanical power of the moving wind rotates the chisels of the wind turbine, a generator within the wind turbine is additionally rotated. This causes a coiled cable to rotate roughly a magnet and creates one electrical current which we measure with a multimeter.

Since energy is neither created nor destroyed, the higher the power input, the better the power output will certainly be. Therefore, the more mechanical energy you begin with -- the quicker the knives turn -- the an ext electrical energy will be developed by the turbine.

Background information

Wind is resulted in by distinctions in pressure produced by the uneven heating of Earth"s surface by the sun. Radiation native the sun causes land to acquire thermal energy. The air above the land also gains heat energy and also expands, ending up being less dense and rising.

This movement reasons an area that low pressure at the surface, creating a vacuum that draws wait in. Cooler, denser waiting flows toward the low push area at the surface ar to to fill in the an are left by the risen, cook air. This create a convection current and also thermal energy is transformed right into kinetic mechanical power in the kind of moving air or wind.

See more: How Should A Lift Operator Travel With A Full Pallet On The Forks? ?

A wind turbine transforms the mechanical power of wind into electrical energy. A generator takes the kinetic energy of a relocating fluid, wait in this case, and also converts it come a rotary motion. As wind moves previous the blades of a wind turbine, it move or rotates the blades. These knives turn a generator. A generator functions as an station of an electric motor; rather of applying electrical power to rotate it and also create mechanical energy, it provides mechanical power to turn and create electrical energy. Generators spin coiled wire about magnets to produce an electric current.