2502: (Allied Science) Renewable Energy
Books:
1. Renewable Energy Resources, By John Twidell, Tony Weir
How to Learn from YouTube Videos?
YouTube can be a valuable resource for your studies. Here's a step-by-step guide to help you make the most of educational videos:
1. Choose Wisely:
- Pick a video that's related to your course or interests.
- Make sure it's from a trusted source.
2. Turn on Subtitles:
- If available, use subtitles to help you follow along.
3. Take Notes:
- Keep a notebook or use your computer to write down important points as you watch.
- Note the time if something seems crucial.
4. Listen Actively:
- Pay attention to how the speaker talks. Their tone and emphasis can show what's important.
- Listen for examples or stories that explain the main ideas.
5. Pause and Rewind:
- Don't be afraid to stop or go back if you miss something.
- Rewatch parts that are tricky or interesting.
6. Look at Visuals:
- Pay attention to any pictures, graphs, or charts in the video. They can help you understand better.
- Take notes on what you see.
7. Summarize:
- Pause now and then to say what you've learned in your own words.
- Try to figure out what the video is mostly about.
8. Ask Questions:
- Think about what you don't understand or want to know more about.
- Be curious and think critically.
9. Dig Deeper (if needed):
- If the video mentions things you don't know, look them up for more information.
10. Share and Discuss: - Talk about what you've learned with friends or classmates. - Read the comments to see if others have questions or insights.
11. Take Breaks: - If the video is long, it's okay to take short breaks to stay focused.
12. Review and Organize: - After watching, look over your notes and make them neat. - Highlight the most important parts.
13. Use What You've Learned: - Think about how the video can help you in your classes or interests.
14. Teach Others (if you want): - Teaching can help you understand better and help others too.
Remember, learning from YouTube videos is a skill you can develop. Be patient with yourself, keep practicing, and have fun exploring new topics!
Follow these Videos for your preparation:
1. Renewable Energy 101 | National Geographic
Title: Renewable Energy and Its Role in Fighting Climate Change
Introduction
·
Around the world, renewable energy use is
on the rise, signifying a global shift towards sustainable energy sources.
·
These alternative energy sources could
hold the key to fighting climate change, one of the most pressing challenges of
our time.
Part 1: Understanding Renewable Energy
What is Renewable Energy?
·
Renewable energy is generated from sources
that naturally refill themselves and never run out. It's a stark contrast to
finite fossil fuel reserves.
The most common renewable energy sources are:
·
Solar: Harnessing the power of the sun
through photovoltaic cells and solar panels.
·
Wind: Utilizing wind turbines to convert
wind energy into electricity.
·
Hydro: Capturing the energy of flowing
water through dams and turbines.
·
Geothermal: Tapping into the Earth's
internal heat for power generation.
·
Biomass: Using organic materials such as
wood, agricultural residues, and waste to produce energy.
·
Over 80% of the total energy consumed by
humans is derived from fossil fuels, which contribute significantly to
greenhouse gas emissions.
Part 2: The Rise of Renewable Energy
Renewables: The Fastest Growing Energy Source
·
Despite the dominance of fossil fuels in
our energy landscape, renewables are currently the fastest-growing source of
energy globally. This growth is driven by increasing awareness of environmental
concerns and advancements in technology.
Benefits of Renewable Energy
Combatting Climate Change
·
Renewable energy creates no direct
greenhouse gas emissions during power generation. Any emissions produced are
indirect, primarily resulting from the manufacturing, installation, operation,
and maintenance of renewable energy systems. However, even these emissions are
minimal compared to fossil fuels.
Decreasing Pollution
·
Wind, solar, and hydroelectric systems
produce no air pollution emissions. This means cleaner air and reduced health
risks for the communities near these facilities.
·
Geothermal and biomass energy systems have
emissions considerably lower than non-renewable energy sources, further
contributing to improved air quality.
Reliability
·
Renewable energy sources are well,
renewable. They will never run out, making them a reliable source of power for
the long term.
·
Once built, renewable energy facilities
have minimal operational costs, and the fuel is often free. As a result,
renewable energy prices tend to be stable over time.
Part 3: The Downsides of Renewable Energy
Challenges
·
Generating power at the same large scale
as fossil fuels can be challenging. Fossil fuel power plants are often large
and centralized, providing energy consistently.
Ecological Impact
·
The construction of wind farms and dams
can disrupt local wildlife and migration patterns. This environmental impact is
a concern that must be addressed as renewable energy infrastructure expands.
Intermittency
·
Solar and wind energy are intermittent,
meaning they only generate power when the sun is shining or the wind is blowing.
Energy storage systems, such as batteries, can store excess energy for later
use to address this issue.
Energy Storage
·
While energy storage solutions like
batteries are essential for maintaining a consistent energy supply from
intermittent sources, they are often costly, requiring further investment and
technological advancements.
Conclusion
·
Despite the challenges, renewable energy
offers a viable and environmentally friendly alternative to the greenhouse gas
emissions and pollution associated with fossil fuels.
·
Advancements in technology are making
renewable energy more accessible, affordable, and efficient. These developments
continue to drive the global transition toward cleaner energy sources.
·
With the collective efforts of nations and
individuals, an end to climate change is a realistic goal that we can strive to
achieve.
..........................................................
2. Can 100% renewable energy power the world?
· Every year, the world uses a huge amount of oil—35 billion barrels. This heavy reliance on oil pollutes the Earth, and there's only a limited amount available. Scientists think we've already used up 40% of the world's oil. At this rate, we might run out of oil and gas in about 50 years, and coal in a century.
· But we've got other options! We have lots of sunlight, water, and wind. These are renewable energy sources, but right now, they only make up about 13% of what we use. To use only renewable energy, it needs to be cheap and easy to get—a big challenge even if we focus only on science and engineering, ignoring politics.
· Let's look at how we use energy. We mostly use electricity and liquid fuels. Electricity runs so many things in homes, businesses, and factories. And liquid fuels are crucial for transportation.
· Now, for electricity: Good news! Our technology can capture a huge amount of energy from renewable sources like the sun. But there are problems. Solar plants need to be in sunny places like deserts, far from where lots of people live. Other renewable sources like hydroelectric and geothermal have limits too.
· We could build a massive electrical network globally to move this energy around. But it's super expensive! Making it more efficient and changing how we move energy would also be a big job.
· Also, our current power lines lose energy because of resistance in the wires. Longer lines mean even more energy lost. Superconductors could help, but they need super cold temperatures, which takes more energy.
· For liquid fuels like those for cars, the challenge is storing renewable energy easily. We're improving lithium-ion batteries, but they can't hold as much energy as gasoline. For cars, bigger vehicles like ships or planes need even more energy. For a plane to cross the Atlantic, we'd need a 1,000-ton battery!
· One idea is turning solar energy into a form we can easily store and move, but it's not efficient enough yet. To solve these problems, we need lots of creativity, innovation, and incentives. Switching completely to renewable energy is a tough problem—mixing technology, money, and politics. The priorities in solving this problem depend on what we assume. But there's hope! Smart scientists worldwide are working on this, and governments and businesses are investing in using the energy around us."
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3. A Faster Way to Get to a Clean Energy Future
4. 7 Types of Renewable Energy
5. Causes and Effects of Climate Change
6. The Mystery Flaw of Solar Panels
Syllabus: World energy inventory and projected use and energy status of Bangladesh, needs for alternative energy options, global climate change drivers, Global carbon (C) emissions, world’s fossil fuel reserves. Basics of solar energy, need for solar photovoltaics, current approaches in solar cells, new age of solar cells and solar technology: dye-sensitized solar cell, perovskite solar cell, quantum dot solar cell, Cd-Te solar cell etc., solar fuels, hydrogen energy, photocatalytic water splitting, commercial viability of solar fuels, prospect of solar energy in Bangladesh.
**Energy Scenario of Bangladesh Click here:
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