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Grade 9 Science: Quarter 3 Week 3: Energy from Volcanoes: Geothermal Energy
Here are the sub-topics discussed in this video lesson:
– What is Geothermal energy?
– How to generate Geothermal energy
– Geothermal Power Plant
– Geothermal Heat pumps
– Advantages and Disadvantages of Geothermal Energy
I hope this video will help you understand your lesson more 🙂
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Texas A&M University’s Andrew Dessler vs. Steven Koonin, former undersecretary for science at the Department of Energy, at the Soho Forum.
Does the world need to rapidly convert to using renewable energy to save the planet from global warming? That was the topic of a Soho Forum debate held at the Sheen Center in New York City on Monday, August 15, 2022.
Andrew Dessler, the director of the Texas Center for Climate Studies at Texas A&M University, argued that fossil fuels are endangering life on the planet by causing global warming through greenhouse gas emissions. He contended that solar and wind represent safe, reliable, and cost-effective means to decarbonize the electric grid.
Steven Koonin, who served as undersecretary for science at the Department of Energy during the Obama administration and is the founding director of New York University’s Center for Urban Science and Progress, argued that making large and rapid reductions in greenhouse gas emissions aren’t necessary to protect the earth. He also contended that doing so isn’t cost-effective and that it’s immoral. Koonin is also the author of Unsettled: What Climate Science Tells Us, What It Doesn’t, and Why It Matters.
The debate was moderated by Soho Forum Director Gene Epstein.
Intro edited by Regan Taylor; interview body edited by Brett Raney.
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Disclaimer- Some contents are used for educational purpose under fair use. Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use.
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As the U.S. attempts to shift away from fossil fuels, renewable energy resources bring waste problems of their own. Recycling or disposing of wind turbine blades and solar panels can be tricky, and many often just end up in land fills. Ben Tracy reports.
#renewableenergy #fossilfuels #environment
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Biomass is an organic renewable energy source that includes materials such as agriculture and forest residues, energy crops, and algae. Scientists and engineers at the U.S. Department of Energy and its national laboratories are finding new, more efficient ways to convert biomass into biofuels that can take the place of conventional fuels like gasoline, diesel, and jet fuel. This edition of Energy 101 shows how biomass is broken down and refined into sustainable biofuels via biochemical and thermochemical processes.
For more information on biofuels visit http://www.eere.energy.gov.
Iceland has harnessed the potential of geothermal energy, heating 90% of its houses and producing 30% of its electricity with geothermal. Geothermal energy is very important in Iceland that relies 100% on renewables for both electricity and house heating. The cascading use of geothermal was also pioneered in Iceland and has created new industries in Iceland through the circular economy mindset of making the most of each resource. Icelandic expertise in geothermal is also a valuable export product.
Read more: https://www.greenbyiceland.com/geothermal-energy/
Find your Icelandic GreenTech partner: https://www.greenbyiceland.com/greentech-partners/ Video Rating: / 5
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Ronald Stein is a Pulitzer Prize-nominated author, internationally-published columnist, energy consultant, engineer, and policy advisor for the Heartland Institute. His books include “Clean Energy Exploitations,” “Just Green Electricity,” and “Energy Made Easy.” He talks to Larry Elder about how people in developing countries are being exploited for the raw materials to make “green energy” products, and they also discuss many of the other shortcomings of the green energy movement.
Doodle Science teaches you high school physics in a less boring way in almost no time!
Script:
Different types of energy can be transferred from one type to another. You can see that a car engine transfers chemical energy, which is stored in the fuel, into kinetic energy in the engine and wheels so it can get you from A to B. In a lamp the electrical input is converted into light energy. However not all the energy put in is turned into useful energy, some of it is turned into energy we don’t need such as heat.
Sankey diagrams summarise all the energy transfers taking place in a process. The thicker the arrow, the greater the amount of energy involved. This Sankey diagram for an electric lamp shows that most of the electrical energy is transferred as heat rather than light. This means it’s very inefficient. We can calculate efficiency using this simple formula, useful energy, in this case 10J divided by the total energy input, which is 100J, which gives us an efficiency of 0.1 or 10% if you times it by 100.
Big batteries are perhaps the key to making a completely renewably powered grid possible. Luckily there are already some massive ones paving the way. This week Imogen visited Europe’s largest battery energy storage system, Pillswood in Hull to find out how Harmony Energy is getting as much clean energy from Dogger Bank, the world’s biggest wind farm, onshore and into our homes. But these are no ordinary batteries, at 200 MWh these Tesla Megapacks are decked out with Artificial Intelligence, these are working to make the grid both renewable and flexible.
00:00 Massive Megapacks
00:36 Intermittency of Renewable Energy
01:28 Largest Storage in Europe
01:53 Charging and Discharging
03:19 How do you build it?!
04:33 Artificial Intelligence
05:26 Managing the Grid
06:12 100% Clean Energy System
06:52 The Future of Energy?!
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Solar energy is derived by capturing radiant energy from sunlight and converting it into heat, electricity, or hot water.
With the technology to harvest it, there is a limitless supply of solar energy, meaning it could render fossil fuels obsolete.
Wind
Wind farms capture the energy of wind flow by using turbines and converting it into electricity.
Wind energy is a clean energy source, which means that it doesn’t pollute the air like other forms of energy.
Wind energy doesn’t produce carbon dioxide, or release any harmful products that can cause environmental degradation or negatively affect human health like smog, acid rain, or other heat-trapping gases.
Hydroelectric
Water flows through the dam’s turbines to produce electricity, known as pumped-storage hydropower.
Hydroelectric power is very versatile and can be generated using both large scale projects, like the Hoover Dam, and small scale projects like underwater turbines and lower dams on small rivers and streams.
Geothermal
Geothermal heat is heat that is trapped beneath the earth’s crust from the formation of the Earth 4.5 billion years ago and from radioactive decay.
Geothermal energy is not as common as other types of renewable energy sources, but it has a significant potential for energy supply.
Geothermal energy is naturally replenished and therefore does not run a risk of depleting (on a human timescale).
Ocean
The ocean can produce two types of energy: thermal and mechanical.
Ocean thermal energy relies on warm water surface temperatures to generate energy through a variety of different systems.
Ocean mechanical energy uses the ebbs and flows of the tides to generate energy, which is created by the earth’s rotation and gravity from the moon.
Unlike other forms of renewable energy, wave energy is predictable and it’s easy to estimate the amount of energy that will be produced.
This type of renewable energy is also abundant, the most populated cities tend to be near oceans and harbors, making it easier to harness this energy for the local population.
Hydrogen
Hydrogen needs to be combined with other elements, such as oxygen to make water as it does not occur naturally as a gas on its own.
When hydrogen is separated from another element it can be used for both fuel and electricity.
Hydrogen can be used as a clean burning fuel, which leads to less pollution and a cleaner environment.
It can also be used for fuel cells which are similar to batteries and can be used for powering an electric motor.
Biomass
Bioenergy is a renewable energy derived from biomass.
Biomass is organic matter that comes from recently living plants and organisms.
The use of biomass in energy production creates carbon dioxide that is put into the air, but the regeneration of plants consumes the same amount of carbon dioxide, which is said to create a balanced atmosphere.
Biomass can be used in a number of different ways in our daily lives, not only for personal use, but businesses as well.
