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Working of a wind turbine is illustrated in this video with the help of animation. The topic covered are blade design, use of brake, velocity sensor, yawing mechanism, blade tilting, wind turbine efficiency and Betz’s limit.
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The sun has powered organic life on planet Earth since before human beings even existed. And we’ve attempted to harness the power of solar energy since the very beginning. Although early uses for solar energy revolved around methods to ignite a fire, the 20th century introduced mankind to the potential of solar electricity. In this video, we’ll explore the technology behind a solar power system and how it converts the sun’s rays into clean, renewable energy while caring for Mother Earth. It’s an energy strategy that proves working with nature can yield greater results than trying to fight against it. You can visit our website for more information today!
Transcript:
Renewable Energy 101
Question: What’s the most abundant energy source in our solar system? Here’s a hint, it’s 1 million times bigger than the Earth and without it our planet would be a dark, cold rock floating in space. You guessed it: the incredible, brilliant sun.
The Earth gets more energy from this ball of fire and gas in one day than the whole world’s population uses in an entire year. Every living thing depends on the sun for its existence, from tiny microbes deep in the ocean to plants, animals and people.
Humans have been tinkering with solar energy since the dawn of time. Ancient civilizations used glass and mirrors to light fires, but it wasn’t until the 1950s that technology was developed to convert the sun’s energy into electricity using photovoltaic cells. Today, solar technology is more efficient and less expensive and is used all around the globe to create electricity, heat water, cook food and even power vehicles.
So how do solar panels usually work? When the sun hits a solar panel, material inside (usually silicon) absorbs the energy. This causes the electrons and its atoms to get very excited and start dancing around. The atoms then get hot and shed the electrons, which travel out of the panel through copper wiring and — ZAP! — we have electricity! A control device called an inverter changes this electricity from direct current to the alternating current we use. The electricity then passes from breaker boxes to outlets and into electrical items like a computer and lights. Whatever you don’t use can go back into the grid to be used by someone else.
So there you have it — the amazing power of the sun. Some people see a future where most of our energy can come from this pollution-free and renewable resource, and that’s a sunny outlook that will make the whole world smile!
About Green Mountain Energy: As the nation’s longest-serving renewable energy retailer, we’ve been on a mission to change the way power is made since 1997. By choosing our 100% clean, renewable wind and solar energy plans for their homes and businesses, Green Mountain customers have avoided more than 81 billion pounds of CO2 emissions to date — that’s like taking 8.6 million cars off the road for an entire year! But, we’re more than just an energy company. We’re helping our customers make a positive environmental impact, support a cleaner grid and green their carbon footprints with sustainable living solutions, renewable energy plans and the purchase of carbon offsets. And, our 501(c)(3) nonprofit organization, Green Mountain Energy Sun Club®, has donated more than million in grants to nonprofits for sustainability projects focused on renewable energy, energy efficiency, resource conservation and environmental stewardship. For more information, visit greenmountainenergy.com and gmesunclub.org. Together, we’re building a cleaner, greener tomorrow. About: Green Mountain Energy is the nation’s longest-serving renewable energy retailer and believes in using wind, sun and water for good. The company was founded in 1997 with the mission to “change the way power is made.” Green Mountain offers consumers and businesses the choice of cleaner electricity products from renewable sources, as well as carbon offsets and sustainable solutions for businesses.
More from Green Mountain Energy!
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This talk is a wonderful global perspective on climate change and the effective actions we can take as individuals to collectively save the planet. Gordian Raacke is executive director of Renewable Energy Long Island, a not-for-profit organization working to accelerate the transition to 100% renewable energy systems. With a degree in civil engineer and 25-year track record on regional energy issues, Mr. Raacke will portray why and how we must and will transition to a 100% renewable energy supply glocally.
Gordian was a founding member of the Long Island Offshore Wind Initiative established in 2002, helped build the solar market on Long Island, and was trained by Vice President Al Gore as a Climate Reality Leader. In 2011, he led an initiative to study a one-hundred percent renewable electricity future for the region. He chaired the Energy Sustainability Committee of the Town of East Hampton and serves on the Town of Southampton Sustainability Committee, helping to formulate and implement community-wide 100% renewable energy goals. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx
Water — so essential to us all, and yet it still has the potential to further impact our lives in important and positive ways. Hydroelectricity goes by many names — “hydroelectric energy,” “hydropower,” or just plain “water power” — but don’t let that trip you up. It all boils down to harnessing the force of moving water. In this video, you’ll learn interesting hydropower facts and how water power works. Isn’t it amazing how something as simple as water can offer us clean, renewable energy to power our homes, businesses and communities sustainably? We certainly think so!
Transcript:
Renewable Energy 101
Water covers 71% of the Earth’s surface and is vital to our daily lives. It can also be a clean, renewable, reliable source of electricity.
Hydroelectric energy comes from capturing the force of moving water that’s in our Earth’s rivers and oceans. We do this by using the movement of the water to spin hydraulic turbines. That generates kinetic energy, which is converted to electricity through a generator and then sent to the power grid.
Most hydropower is generated from dams built on rivers and streams, often where there’s a big drop in elevation so gravity can help us out. Dams block the water’s natural flow and force it through a large pipe with the turbine and generator before releasing it back into the stream on the other side of the dam. Today, we know that dams — most of which were built before the 1960s here in the U.S. — can disrupt river ecosystems. There haven’t been many new hydro plants built in the U.S. in a few decades, but some existing dams are beginning to be tapped for their electricity-generating potential, and existing hydro facilities are being upgraded to be less harmful to plants, fish and wildlife. This helps us get the electricity we need by protecting the natural environment around us. Now that’s a win-win!
About Green Mountain Energy: As the nation’s longest-serving renewable energy retailer, we’ve been on a mission to change the way power is made since 1997. By choosing our 100% clean, renewable wind and solar energy plans for their homes and businesses, Green Mountain customers have avoided more than 81 billion pounds of CO2 emissions to date — that’s like taking 8.6 million cars off the road for an entire year! But, we’re more than just an energy company. We’re helping our customers make a positive environmental impact, support a cleaner grid and green their carbon footprints with sustainable living solutions, renewable energy plans and the purchase of carbon offsets. And, our 501(c)(3) nonprofit organization, Green Mountain Energy Sun Club®, has donated more than million in grants to nonprofits for sustainability projects focused on renewable energy, energy efficiency, resource conservation and environmental stewardship. For more information, visit greenmountainenergy.com and gmesunclub.org. Together, we’re building a cleaner, greener tomorrow.
More from Green Mountain Energy!
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In the last two decades the contribution of solar energy to the world’s total energy supply has grown significantly. This video will show how solar cell or photovoltaic cell produce electricity.
Check out this interesting video from New Physicist to learn more about PV cells – https://www.youtube.com/watch?v=WfP5YdJn-c4
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View full lesson: https://ed.ted.com/lessons/how-do-solar-panels-work-richard-komp
The Earth intercepts a lot of solar power: 173,000 terawatts. That’s 10,000 times more power than the planet’s population uses. So is it possible that one day the world could be completely reliant on solar energy? Richard Komp examines how solar panels convert solar energy to electrical energy.
Lesson by Richard Komp, animation by Globizco. Video Rating: / 5
Solar panels for home – 9 months later! It’s the video many of you have been asking for. Ever since I published the video about my solar panel system on my home earlier in the year, and my experience with the installation and energy production I’ve been seeing, I’ve been asked for an update on how it’s going. By a lot of people. Well, it’s time. How much energy production have I been seeing? How much money have I spent on versus how much I’ve saved? I’m going to cover it all.
Be sure to visit my Energysage portal to help with that: http://www.energysage.com/p/undecided/
Full Script:
https://undecidedmf.com/episodes/2019/7/5/solar-panels-for-home-9-months-later
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