10 points. Describe thoroughly how the solar power is generated?
Describe thoroughly how electricity is generated through solar power
Ok so Solar panels turn energy from the sun’s rays directly into useful energy that can be used in homes and businesses. There are two main types: solar thermal and photovoltaic, or PV. Solar thermal panels use the sun’s energy to heat water that can be used in washing and heating. PV panels use the photovoltaic effect to turn the sun’s energy directly into electricity, which can supplement or replace a building’s usual supply.
A PV panel is made up of a semiconducting material, usually silicon-based, sandwiched between two electrical contacts. To generate as much electricity as possible, PV panels need to spend as much time as possible in direct sunlight (1a). A sloping, south-facing roof is the ideal place to mount a solar panel .
A sheet of glass (1b) protects the semiconductor sandwich from hail, grit blown by the wind, and wildlife. The semiconductor is also coated in an antireflective substance (1c), which makes sure that it absorbs the sunlight it needs instead of scattering it uselessly away.
When sunlight strikes the panel and is absorbed, it knocks loose electrons from some of the atoms that make up the semiconductor (1d). The semiconductor is positively charged on one side and negatively charged on the other side, which encourages all these loose electrons to travel in the same direction, creating an electric current . The contacts (1e and 1f) capture this current (1g) in an electrical circuit.
The electricity PV panels (2) generate is direct current (DC). Before it can be used in homes and businesses, it has to be changed into alternating current (AC) electricity using an inverter (3). The inverted current then travels from the inverter to the building’s fuse box (4), and from there to the appliances that need it.
PV systems installed in homes and businesses can include a dedicated metering box (5) that measures how much electricity the panels are generating. As an incentive to generate renewable energy, energy suppliers pay the system’s owner a fixed rate for every unit of electricity it generates – plus a bonus for units the owner doesn’t use, because these can help supply the national grid. Installing a PV system is not cheap, but this deal can help the owner to earn back the cost more quickly – and potentially even make a profit one day.
Solar panels capture energy from sunlight and generate electricity using the photovoltaic effect, which was first discovered by Alexandre Edmond Becquerel, a French physicist, in 1839. Each solar panel is made up of many solar cells (typically 60) that each generates a small amount of electricity.
1.Photons (which make up sunlight) hit the solar panel and are absorbed by the silicon.
2.Electrons within the silicon are knocked loose by this and are free to move.
3.The electrons are captured in an electric field and picked up by metal contacts.
4.This generates a current – a flow of electricity – which you can use.
The solar cells are joined together in a module (or panel) to increase the electrical power, and the modules connected to form an array. The electricity produced can be used straight from the panels in some cases, but an inverter is usually used to change the electricity form from the direct current produced to alternating current that your house uses.
For protection, the front of a solar panel is covered in clear glass and the back with a plastic film. An aluminium frame is added to hold the individual cells in place and to enable easy mounting of the panels.
I hope this helps
Is there an iPhone 5 solar case?
I have seen all over the internet that there are solar powered cases for iPhone 4 and 4S models but not the 5. I also wonder if there are any, if they are affordable and provide a link. If there aren’t any, when would they be coming out?
There are several.
Here is a link to a review
Solar cycle 24-destruction?
What is the worst case scenarion for solar cycle 24 and what are the chances of anything bad happening? This is not a 2012 question, i dont believe 2012 is the end of the world, but i do believe that if the world loses so much technology because of the cycle that people will be pissed and i might be afraid to leave my home lol
just one thing though, it says that it would take 4-10 years of recovery and 1 to 2 trillion dollars…
The upcoming solar maximum is expected to be notably less intense than the last one.
A worst-case coronal mass ejection, which is not strictly tied to the solar cycle, might cause temporary failure of the power grid, and would temporarily interfere with communications. Losing technology is not even a remote possibility, unless you count being without your email/cell phone for a few hours (most likely) to a few days (worst case).
@Randy P: The 1989 event knocked out power to part of Quebec; that represents a fairly small slice of the Canadian power grid, actually.
Edit: And? Carrington Event scale flares occur every ~500 years at their most frequent. The last one was 1859. Also, that prediction represents a ‘total failure to prepare’ situation. The 4-10 year figure represents replacing every last damaged multi-ton transformer and satellite (which would NOT be required to restore power)… On a worldwide basis. See my second source, point 15. I’ll add more sources to put things in the proper context as I find them.
whats the pros and cons for a family of 5 making the new home solar power?
we are looking at solar power for our new land, are you a family of 5? have you done this before, thanks.
Hey Hotmumma, I applaud you for looking into solar power. In my experience, when you look into solar power, the one thing there is an abundance of is misinformation.
We live in a home that has been powered by the wind and sun for 10 years now. Our solar array fits quite nicely on the space provided by our one car carport, it generates 1.4 kilowatts during peak sun, and does not need thousands of square feet of space. Our entire system, including the wind turbine, battery bank and other electronics costs less than $15,000 USD. After state incentives, tax deductions and the small amount we receive selling carbon credits to industry, our cost is just under $10,000. We do have a small, efficient home, just under 1,200 square feet, but the point is clear, you don’t need to mortgage your sisters second home to pay for it. We still have the utility company here, but our monthly bills average about $6. I would estimate our payback at 10 to 12 years, but that is not the main reason we did all of this.
Last year, there were two power failures in our county, each lasting about half a day. In both cases, we were not aware of them. It’s difficult to put a price tag on something like that. There is also the fact that when we do a load of laundry, or run the TV, we are not adding CO2 to the air and mercury to the water because our power is not sourced from a coal power plant. In a few years,we plan on replacing one of our cars with a plug in hybrid, which will charge from our solar array once we add a few more panels to it, at a cost of about $1,000. This will allow us to have transportation in town with virtually no environmental footprint, or any need to buy gasoline.
Beyond our own personal benefits, having a solar powered home has made us the defacto expert on the field in our town. To that end, we started running solar power seminars at our local school several years ago. We spend an hour or so with the 5th graders in school, hooking up a panel, battery, and some small loads so they can learn how it works. Then they run a field trip out to our place to see a working solar powered home first hand. Our hope is that in several more years, they will grow up to persue the same thing you are today.
Powering your home from solar power requires more than mere technology however, it requires some lifestyle changes. People who grow their own tomatoes know a great deal about soil, watering, bugs and sunlight because they have to. Even though it might be cheaper to buy them at the store, they go to the trouble to maintain a garden. People who grow their own electrons instead of buying them at the power company have a similar curse. They have to know where each one goes in their home. When you power your home from renewable sources, there is no such thing as an, “Average House,” or “Standard Size Panel.” Every situation is different. No matter how well you plan your system, or how many contingencies you allow for, there will always be a day where you have a shortage of power. Most solar homeowners I know have a generator for just such a shortage, but they work hard to run it as little as possible. Like I said, it’s a lifestyle, and only you can decide if it’s right for you. What I would suggest is you do some more research, beyond asking people who have never tried it for advice over the internet. First get a subscription to Home Power Magazine, the only periodical devoted to these things. Then check out some of the non profit groups I have listed below. Learn what you can, try to make it to one of the renewable energy fairs in your area. In the end you might decide not to get involved at all, and that’s fine. At least you will be well informed. Good luck, and take care, Rudydoo
SOLAR FLARES OMG???!?!?!?
http://news.yahoo.com/strongest-solar-storm-since-2005-hitting-earth-163628746.html WHATS HAPPENING :O?
Yep, solar flares. Wow. The Sun emits anywhere from several solar flares per day at the most to maybe one per week at the least. Every 11 years the Sun goes through a cycle where the number increases, to the several per day point. It’s terrifying thinking that one of my cell phone calls might get dropped, or my cable TV reception might go out for a little while. Whew, at least that’s just the worst case scenario. The average person lives through literally THOUSANDS of solar flares in a lifetime.
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