How Does Solar Energy Work To Generate Electricity
Energy Electricity in Science How Does Solar Energy Work
Hi, I'm Steve Jones, and I'm going to explain how solar energy works. Now, solar means sun, so we know that the energy is coming from the sun, and we might think it comes as heat or whatever. In fact, we get all kinds of energy from the sun, but it is all radiation. Remember, outside the earth there is no atmosphere so nothing physically moves from the sun to us it is radiation. So, radiation from the sun which might be ultraviolet, it might be xradiation. It might even be infrared radiation which is heat radiation, or even radar very,.
Very like radio waves, so all kinds of radiation comes from the sun. Some kinds of radiation when they hit the surface of a silicon chip that is a thin slice of silicon crystal it sets up a voltage between the ends, so you get a voltage between the sides of the chip, and that voltage will produce a current. Now, this is quite small so you need quite a big silicon chip, or a lot of silicon chips. And when you look at a solar array as they call it you will see it is made up of lots and lots of small silicon plates. Each of them.
Produces a small current. Those currents are combined, and they can provide enough current to drive a household circuit set of circuitry up to about three thousand watts with a standard panel about one meter by one meter. So, solar energy, which is free of course, is available providing we can produce the silicon chips. The silicon chips are very expensive to produce, so although this energy is free the solar panels which are made to harness that energy are expensive. So, it works, but it only works as well as how much money you're prepared.
How Solar Energy Is Converted To Electricity Through Solar Panels
Sunlight is made up of tiny packets of energy, called photons. Every minute, enough of this energy reaches the earth to meet the world's energy demand for a whole year. Photovoltaic panels consists of many solar cells, these are materials made like silicon, one of the most common elements on earth. The individual cell is designed with a positive and a negative layer to create an electric field, just like in the battery. As photons are absorb in the cell, their energy causes electrons to come free. The electrons move towards the bottom of the cell, and exit through the connecting wire. This flow of.
Energy 101 Concentrating Solar Power
Bjbj Take the natural heat from the sun, reflect it against a mirror, focus all of that heat on one area, send it through a power system, and you've got a renewable way of making electricity. It's called concentrating solar power, or CSP. Now, there are many types of CSP technologies. Towers, dishes, linear mirrors, and troughs. Have a look at this parabolic trough system. Parabolic troughs are large mirrors shaped like a giant U. These troughs are connected together in long lines and will track the sun throughout the day. When the sun's heat.
Is reflected off the mirror, the curved shape sends most of that reflected heat onto a receiver. The receiver tube is filled a fluid. It could be oil, molten salt something that holds the heat well. Basically, this super hot liquid heats water in this thing called a heat exchanger and the water turns to steam. The steam is sent off to a turbine, and from there, it's business as usual inside a power plant. A steam turbine spins a generator and the generator makes electricity. Once the fluid transfers it heat, it's recycled and used over and over.
And the steam is also cooled, condensed and recycled again and again. One big advantage of these trough systems is that the heated fluid can be stored and used later to keep making electricity when the sun isn't shining. Sunny skies and hot temperatures make the southwest U.S. an ideal place for these kinds of power plants. Many concentrated solar power plants could be built within the next several years. And a single plant can generate 250 megawatts or more, which is enough to power about 90,000 homes. That's a lot of electricity.
Generate Electricity From Vinegar At Home Cool Science Experiment
Hi , in this tutorial I'm gonna do a really cool science experiment so I gotta make an Ice Tray battery at home and you need a few materials that you can usually find from around the house are you ready if you are, so let's do it Here is what you need White or red vinegar, 5 pieces of copper wire 5 nails, Ice tray, One LED, safety glasses Step1 Wrap a nail with the copper wire like this then repeat this process with the rest of the nails Step 2 Fill up 6 sections of the ice tray.
With red or white vinegar Step 3 okay, in this step you should create a circuit by inserting each nail into the vinegar like this. Make sure the copper wires don't contact with the nails in each sections Step 4 Place the LED in between the sections that contain only one nail and one wire. The copper is the positive terminal and nail zinc is the negative terminal. Try this experiment at home and enjoy it. Be the first one to know about our next tutorials.
Why Install Solar Panels at Home
We would be at the high end of electricity users, if there is pretty much an appliance or gadget we've probably got it. We were look at the whole solar panel thing for quite a while. We thought let's just start with eight panels on our roof. We were really pleasantly surprised about the big difference that even those eight panels have made to our bills. At the moment, one to two percent of Australian energy consumption is from solar photovoltaic. Solar energy is the light from the Sun comes and hits a solar panel inside that solar panel.
Are solar cells which made a person conducting materials the light is absorbed by the semiconductor, it excites the electron in there, the electron moves and once you've got a flow of electrons that's your electricity. If you are gross metered, that power then goes straight out to the grid mixed up with all the other power and you get a credit for that on your electricity bill. Where it is net metered, that power is then available for use in your house. But if there is an excess, then you're exporting that out to the grid and you get a credit.
We were really conscious that a few of our neighbors were talking about solar and people starting to put solar panels up. And also when we found that we could basically pay by installments, it just made it really affordable. It's really nice to see that effectively a third of the cost of that electricity use is being paid for by our solar panels. Solar panels are an intermittent source of electricity. So that is, while they're in sunshine they are producing power and of course at night time they're not producing any power at all.
As a household, you're electricity needs don't quite match up with that. so for the times when the sun isn't hitting your panels, that's when you need to be connected to the grid. Ideally, you want to have a roof that is angled towards the sun. In Australia, you are particularly looking for a north or north west facing roof. Australia is absolutely ideal for solar energy. You only have to flying into any Australian city and have a look how much roof space is still available, so there is alot of growth opportunity in Australia.
Sound to Electricity How do Microphones and Speakers Work
, it's Cram. Sound. Allowing us to perceive the world through vibrations in their air. And electricity, flowing electrons that power our modern world. These two seem like they couldn't be more different, but in fact they are different forms of the same thing. They are both forms of energy, and can be converted to one another. How To figure this out, lets use the microphone as a starting point. It takes sound in from the top part, which has several holes in it, processes it somehow, and then sends it off as electricity.
Through a wire.It seems simple enough, except for the processing part. Microphones are a kind of transducer, something that can convert one form of energy to another. In this case, it is sound to electricity. There are many kinds of microphones, but one thing they all have in common is called the diaphragm, a thin piece made of a material, commonly plastic, aluminum or paper. This acts in a similar fashion to our eardrums, it vibrates because of sound waves. Ok, but our eardrums don't convert sound into electricity. We're all familiar with a simple.
Electrical generator, right Basically, there is a coil, typically a conductor like copper, and inside the coil is a magnet. As the magnet rotates moves, an electrical current passes through the coil. This is because of electromagnetism, and electricity can be used to make a magnet, the opposite is also true. So when this material vibrates, it is attached to the magnet, therefore moving the magnet, thus creating an electrical signal. This signal is passed through a wire to a speaker, or anything that plays music. This speaker is also a transducer. It does the opposite though.
Remember how electricity can be used to create a magnet Well, that's what's happening. The electricity flows through the coiled conductor inside the speaker, in turn moving the magnet. This magnet usually moves a cone, instead of a thin material, which produces the sound. This is why larger speakers typically have more bass, since the cone is bigger, larger wavelengths can travel further, thus having more oomph and cleaner sound. Wait, so if sound can make energy, why don't we use it as a renewable source of energy That's because the amount of energy is extremely low, too low to even bother with. Or it would.
Solar Energy DelftX on edX Course About Tutorial
DR. ARNO SMETS Welcome to the Delft University of Technology. My name is Arno Smets and it's my pleasure to be your lecturer in the course, Solar Energy. In this course, you will be introduced to technologies which convert sunlight into electricity, heat and solar fuels. We will discuss the fundamental physical principles of how a solar cell works and the current status and future challenges of solar energy technologies. I will teach you how to design a solar system for any application. SPEAKER 1 After completion of the course SPEAKER 2 I can analyze the performance of solar cells and modules.
SPEAKER 3 I can explain the various concepts to convert solar energy into electricity, heat and solar fields. SPEAKER 4 I can design on paper a complete photovoltaic system for any application. SPEAKER 5 I can explain the physical working principles of photovoltaic conversion in solar cells. SPEAKER 6 I can describe various solar technologies and their future challenges. SPEAKER 1 On this course, you can also interact with your fellow students all over the world by sharing your own ideas and experiences. GUILLERMO I'm Guillermo and I'm from Ecuador. SPEAKER 7 INAUDIBLE Bangladesh.
SPEAKER 8 I'm INAUDIBLE Achmed from Institute of Renewable Energy at Technology University of INAUDIBLE. SPEAKER 9 I'm a student of the massive open online course of solar energy. SPEAKER 10 Solar energy is becoming more popular in Mexico every day. SPEAKER 11 I am INAUDIBLE from Morocco. SPEAKER 12 Welcome to the Institute of Renewable Energy University of Dhaka, Bangladesh. SPEAKER 13 I will show you my own PV systems. SPEAKER 14 You can watch the system consist of light INAUDIBLE post. SPEAKER 1 You'll surely need and enjoy this course on solar energy.
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