Tuesday, August 2, 2016

Electrical Energy and Wind Turbines

Wind has always been one of the effective ways to produce electrical energy. Technically wind does not directly produce electrical energy but goes through a process. Wind are always in motion, and everything that moves produces what we call a kinetic energy. Everyday in our lives we see lots of these kinetic energy such as from wind, river, and specifically anything that has motion. To further multiply the effect of this kinetic energy, wind turbines have blades designed where wind goes through which makes it spin. Depending on the the design efficiency and effectiveness of the blades, they can spin for a long time with a small amount of wind. While spinning, this again produces a larger amount of energy called a mechanical energy (kinetic energy + energy produced by the blades in motion). The mechanical energy goes through a rotating mechanical device called a magnetic rotor. The rotor which is made of loops of magnetic copper wires produces electrical charges while it rotates. Most wind turbines has a transformer that increases the electrical generation. The electrical energy generated then travels through underground cables going through a station where electricity is stored for use later on.

The process can also apply to anything that produces kinetic energy. However, wind is the best source of kinetic energy because they are not limited leading us to question what makes a wind? It has been discovered that warm air rises and cold air drops (because they're heavier). From the bottom, warm air rises because they get heated by the sun or the land then they get cooled down as they reach the top then flows back again downward and pushes the other air on the bottom and the cycle repeats. While going through the cycle, air is being pushed making it flow which we can eventually feel and call it a wind.