Intro. to the Natural Sciences

1) Wind power—challenges, benefits and trade-offs

Wind energy has many advantages in environmental, economic, and social areas, but it also has important challenges.

Wind power, when it makes electricity, doesn’t give off greenhouse gases, which helps to reduce climate change, environmentally speaking. Consider Denmark, which gets about half of its home power from offshore wind farms, wiping out millions of tons of pollution each year. This is like the turbine we built in class, since it used wind to turn and didn’t use fuel or electricity.

From an economic standpoint, wind energy can save money in the long run. Wind turbines are expensive to build in the first place, but they use very little fuel and are low maintenance compared to other sources of energy. “That's more efficient over time.”

On a social level, wind energy creates jobs. Turbines have to be built, maintained, and repaired—providing jobs for people, which can help communities, especially in small towns where there are fewer jobs.

But there are challenges, too. Wind turbines can be bad for the environment, because they can kill birds and bats. In California, for example, some wind farms are killing hundreds of birds each year. Economically, the initial cost of building turbines, especially offshore turbines, is high and can be in the millions of dollars. Socially, some people do not want turbines in their neighborhood because they think they are noisy or spoil the view, and that can slow down projects.

Wind energy trade-offs are a balance between its advantages and disadvantages. For example, placing turbines far from cities may reduce complaints from residents, but it also raises the cost of constructing power lines to deliver electricity.

2) Wind turbine design and improvement

Our first turbine was a wooden stick with three long, waterdrop-shaped blades attached to it and a base at the bottom for stability. We chose three blades because most wind turbines have three blades, and we thought it would help with balance and stability.

But when we tried out our turbine, the blades didn’t move at all. My teammate and I worked step by step to find the problem, and we figured out that the blades were too heavy, which didn’t allow the turbine to spin.

To solve this, we redesigned the blades with lighter materials, such as cardboard. With this change the turbine was able to spin properly. This proved the importance of identifying problems one by one and fixing the root cause in engineering. When it finally did work, we felt proud of ourselves because it looked and acted like a real wind turbine.

3) wind energy: general appraisal and effects

Wind energy has its good and bad sides, but on the whole, it is mostly positive. Environmentally, it reduces pollution and helps slow climate change. However, turbines need to be placed carefully to avoid harming wildlife like birds and bats. Socially, wind energy creates jobs, but it can also cause conflicts with people who live nearby. Economically, it is cost-effective in the long term, but the initial cost is high, and wind is not always available, so backup energy sources may be needed.

However, even with these challenges, wind energy is still a good solution. Wind power is a potential source of cheap and clean electricity for many people if turbines are built in the right places and coupled with energy storage systems like batteries. Despite these challenges, wind energy is still a good solution. If turbines are built in suitable locations and combined with energy storage systems like batteries, wind power can provide clean and affordable electricity for many people.

4) Feedback & enhancement

I got two important pieces of feedback that helped me improve my turbine. My teammate said the top of our turbine was too heavy, and that's why it wouldn't spin. They advocated for lighter materials and improved base support.

So I took this feedback and replaced heavier components with lighter materials like straws and cardboard. I also reinforced the base by using multiple bottles and sticks to make it more stable.

These changes allowed the turbine to spin straight and remain in balance. From this experience, I learned that listening to feedback is very important to improve designs, both in class and in real-world engineering projects.

Picture below!