Tag Archives: Alternative Energy

Wind Power at AstroCamp

Wind farms are a common sight these days, but humans have been using wind power for about 2,000 years. It wasn’t always for electricity, however, but to mill grain into flour, operate an organ, or pump water. How does a windmill do any of that though?

When you see a windmill, the part that sticks out most is also the most important: the blades. Blade designs and orientations have changed through the centuries, but they all serve the same purpose and have the same drawbacks. If a windmill has too few blades, the weight of the windmill is imbalanced and will have too much open area, catching very little wind and making it increasingly difficult to actually rotate to blades. Too many blades, and the windmill will be too heavy to easily move in the wind. In either case, power generated by the windmill suffers. Most wind turbines have three blades, and that’s the amount we see most commonly in our whirling windmills class here at AstroCamp.

Wind Power 1

 

Number of blades is not everything though, as you can see above; the angle of the blades plays an important role as well. Our windmill has the usual three fins, but isn’t even moving because its blades are flat against the wind. When the wind hits the blades, it just pushes them back. Once you angle the blades, the wind begins to push the blades back as well as up or down, allowing the windmill to spin. The fins must be angled consistently, however, as if blades on opposite sides are both being pushed up, they will cancel one another out and the windmill will still not move.

Wind power

Adjusting the angle of the blades brought our windmill up to generating over 17 milliamps of current, though campers have gotten over 60 mA with theirs. That’s just the current generated from a tiny windmill in front of a fan, real wind turbines generate enough electricity to power thousands of homes and there are nearly 50 thousand wind turbines in the United States alone.

Wind Power Final

WELCOME TO OUR ASTROCAMP BLOG

We would like to thank you for visiting our blog. AstroCamp is a hands-on physical science program with an emphasis on astronomy and space exploration. Our classes and activities are designed to inspire students toward future success in their academic and personal pursuits. This blog is intended to provide you with up-to-date news and information about our camp programs, as well as current science and astronomical happenings. This blog has been created by our staff who have at least a Bachelors Degree in Physics or Astronomy, however it is not uncommon for them to have a Masters Degree or PhD. We encourage you to also follow us on Facebook, Instagram, Google+, Twitter, and Vine to see even more of our interesting science, space and astronomy information. Feel free to leave comments, questions, or share our blog with others. Please visit www.astrocampschool.org for additional information. Happy Reading!

Categories

Archives

Tags