RENEWABLE ENERGY

Cabrillo CollegeEngineering 5

Wind Turbines

What are the different kinds?

How do they work?

Build your own windmill Test its power output

Horizontal Axis Wind Turbine

HAWT

SavoniousVertical Axis Wind Turbine

VAWT

DarrieusVertical Axis Wind Turbine

VAWT

Enhancing Wind Power

Joby Energy Airborne Windturbines http://www.jobyenergy.com/tech Japanese Wind Power Breakthrough http://

www.mnn.com/green-tech/research-innovations/blogs/japanese-breakthrough-will-make-wind-power-cheaper-than-nuclea?hpt=hp_bn11

Maglev Windturbines http://inhabitat.com/super-powered-magnetic-wind-turbine-maglev/

http://www.maglevwindturbine.com/

How do they work?

Solar Powered !

Wind moves blades

Blades turn generator

DC current generated by rotating coil & magnets

P = ½ ρΑV3

P = Power (Watts)

ρ = Density of air (kg/m3)

A = Swept area (m2)

V = Wind speed (m/s)

The Power of Wind

Measure your Power

Power = Current x Voltage

You will use a Multimeter to measure the current and voltage while your windmill is spinning

Watts = Amps x Volts

Variables to Consider

?

Design to Optimize

Data to Compare

Name of your Windmill

Current measured in Amps

Voltage measured in Volts

Calculate Power: Watts = Amps x Volts

Diameter of Blades in cm

Your Materials

Paper

Bamboo Skewers

Hot Glue

Cork Hub

Procedure

Discuss the pros and cons of at least three designs with your team before beginning construction.

Select the favored design and construct it on the cork hub attached to the generator.

Test your design at the testing station.

Iterate: Can you imagine changes that would capture more power?

Sources

Horizontal Axis TurbinesThe Wind Ninja Savonious photosPegasus Darrieus photo

World of Energy Wind Power Off The Grid Living Estonian Windmill Helix Wind