How is solar heat converted into solar energy?
PV panels are made up of treated silicon and other materials including an antireflective coating. The silicon is a semi-conductor (like metal, not like plastic). When the light hits the silicone semi-conductor, a portion of the energy is absorbed by the panel and knocks electrons in the silicon loose which allows them to flow freely. The PV panels have an electric field that forces these 'freed' electrons to flow in a specific direction - and we all know that electrons flowing in a specific direction is known as 'current'.
Why solar energy is better than biomass?
-can pollute the air if directly burned
-Expensive to install technology to process and recycle wastes
-use up too much land
-Maintaining a supply of the waste product in sufficient quantities to maintain energy production can be difficult
-the burning of biomass produces greenhouse gases, which is dangerous for our earth
-some waste materials may only be available during seasonally (example: at harvest time)
- Could put environments at an even greater risk
*Solar's chance of "running out" in the next dozen millenia ZERO. collection of solar energy is basically a passive one, where as biomass is labor intensive and short termed.
but... that's just an opinion
Are dashboard lights and indicator lights the same thing?
no. however your indicator lights are located in your dashboard. dashboard light will light up when you turn your headlights on. Ex. the lights that are illuminated behind your miles per hour needle or behind your fuel gauge. Your indicator light are a lights that come on when your first turn the ignition. these lights indicate when your oil needs to be changed or your fuel is low or your washer fluid is low or the blue light that is illuminated when your headlights are on bright or high beam etc.....most newer model cars are equipped with the indicator lights. hope this is helpful.
What are solar panels and what they do?
Solar panels are devices that convert sunlight into electricity through the photovoltaic effect. They work by absorbing sunlight with solar cells, which generate direct current (DC) electricity. This electricity can then be used to power electrical devices or stored in batteries for later use.
What tool is the most commonly used to convert solar energy into electricity?
Solar panels are the most commonly used tool to convert solar energy into electricity. These panels are made up of photovoltaic cells that capture sunlight and convert it into usable electricity through the photovoltaic effect.
What conditions affect the solar plexus?
The solar plexus, located just at the center of the ribs, contains a bundle of nerves and arteries that connect many areas of the body. Therefore, any discomfort in the solar plexus can come from many different parts of the body.
How does heat energy from the sun get to the earth?
What type of units is measured in solar energy?
Solar energy is typically measured in units of kilowatt-hours (kWh), which represent the amount of energy produced or consumed over time. This unit is commonly used to quantify the output of solar panels or the electricity usage of a solar-powered system.
What is the term given to heat and light radiated from the sun?
The term for heat and light radiated from the sun is solar energy.
Wind and water energy are both indirect forms of what kind of energy?
solar energy Try kinetic energy - moving force In direct terms, wind and water both provide kinetic energy which can be converted into electricity. However, wind and water have that kinetic energy because of warmth that the sun provides (causing air to expand creating areas of high and low pressure - wind; by evaporating water, forming clouds which then redistribute the water as rain and snow which eventually runs off as a river). Thus, wind and water are both INDIRECT forms of solar energy
How is solar energy extracted?
By using a special kind of cell called the photovoltaic cell. In the presence of light (not necessarily direct sunlight), these cells have the capacity to produce tiny amounts of electricity, which is why these cells are arranged in large banks to maximise current generation.
Below are some numbers I came up with. I would appreciate any input from real professionals in this area.
Assumptions:
average daily electric power usage of a small house - 19 kWh
average daily number of sunshine hours - 5hrs
output of a solar panel during sunshine - 190 W (Evergreen ES-190 solar panel)
sunshine - you have to be able to see shadows on the ground to obtain the specified solar panel output)
dimensions of a solar panel - 5.150 x 3.125 feet (Evergreen ES-190 solar panel)
dimensions of a Sanyo 200 watt panel: 4.325 x 2.93 feet
To cover the daily energy demand in this case you need:
19,000 kWh / 190W / 5h = 20 panels (Evergreen)
19,000 kWh / 200W / 5h = 19 panels (Sanyo)
The area needed for 20 panels (not including the spaces between them):
Evergreen: 5.150 x 3.125 x 20 = 322 square feet (or 30 square meters)
Sanyo: 4.325 x 2.93 x 19 = 241 square feet
Of course, the energy would have to be stored in batteries or the system would have to be connected to power grid.
I recently (October 2007) also read an account of a purchaser that the cost of installation per Watt in California was about $6.91 after state and federal rebates. That would give:
20 panels x 190W x $6.91 = $26,258
If the electric monthly bill was $120, the very simplified return on the investment would be:
$120 x 12 months / $26,258 = 5.5%
The investment will break even, not including inflation and price increases, after 18.2 years. As you can see, it pays to invest in energy reducing techniques before investing in solar electricity. For example, to get a new Energy Star fridge may very well bring your energy usage to 18 kWh, if your fridge is 5 years or older. As well, compact fluorescents and/or LED lighting will bring your lighting down another kWh a day or so.
Grants play a big factor in some states. The magazine Home Power has studied some cases where grants would make the payback 6 years.
EDIT: As of 2010 the cost per watt is at $5~ the average payback in southern California is about 7 to 10 years depending on electric company pay system and type of panels/inverters you are using.
EDIT: Solar Panel efficiencies vary greatly. ranging from about 60w to 245w. Obviously the higher the efficiency the lower the number of panels needed.
Vi characteristics 0f a solar cell?
the VI characteristics graph for a solar cell lies in the third quartering of the graph as both I and V come out to be -ve for the mode of operation ie active region. there are even some value at the dark that is called dark current, better explanation is given in the book by A P Malvino, electronic principles.
Probably not, if the solar panels are installed properly, there will be a convection space in the shade beneath the panels and on top of the roof, which could shade the roof and reduce the amount of heat transmitted to the attic.
Hi: Ditto to the above reply, I would just like to add that these things properly installed and in favorable areas are a big plus. I do recommend you purchase quality products and follow their instructions completely. Check out your area and its ability to perform well as a solar energy cell type envioronment before you invest in anything but a good profession reference book. Be sure you ask questions from someone knowledgable and not someone just trying to hawk their wares. Try the Federal Government and its informative materials and data on what you wish to try. YOU WILL NOT BE SORRY! I have personally seen more people sapped into buying things that are not even a good idea for their areas in first place. One example would be a wind turbine that produces backup for solar cells where the wind norm is well belowe its design. One last comment would be this: Though your area may have lots and lots of hot sun you still may not have a good area for solar cell use because of the avg. moisture content and such as that ( which would disperse the directness of the suns light and therefore damper its effectivness) Hope this helps: Jimiwane
Solar panels receive energy from the Sun and use it to produce electricity. They are much cheaper to maintain than oil-powered electricity generators and oil storage tanks. Solar panels are also friendlier to the environment because they let off less pollution to the atmosphere compared to the smelly emissions which come from oil tanks.
What is solar energy and its uses?
Solar energy is renewable energy from the sun that can be converted into electricity or used for heating and lighting. Its uses include generating electricity through solar panels, heating water for residential or commercial buildings, powering outdoor lighting, and even charging small electronic devices like calculators and cell phones.
Describe how solar panel is used in the generation of electricity?
Solar panels use photovoltaic cells to convert sunlight into electrical energy. When sunlight hits the panels, the photons create an electric current through the semiconductor material. This direct current (DC) is then converted to alternating current (AC) by an inverter, making it usable for powering homes, businesses, and more.
What type of energy storage device used with solar energy?
Solar Energy Storage Devices Because of the intermittent nature of solar radiation as an energy source, excess solar energy produced during sunny periods must be stored. Insulated tanks commonly store this energy in hot water. Batteries often store excess electrical energy produced from wind or photovoltaic devices. One possibility for the future is the use of excess solar-generated electric energy as a supplemental source for existing power networks. Uncertain economics and reliability, however, make this plan difficult to implement. In 2008 a team of researchers at the Massachusetts Institute of Technology announced a possible breakthrough in storing energy generated by solar power. Their experimental system uses different catalysts to produce oxygen and hydrogen gases from water in a chemically benign environment with electric current supplied from solar cells. This process mimics how plants split water into oxygen and hydrogen using photosynthesis. The oxygen and hydrogen can then be recombined inside a fuel cell to provide power when the solar cells do not receive sunlight. The catalyst to produce oxygen consists of cobalt metal, phosphate, and an electrode placed in water. Hydrogen is produced using a catalyst such as platinum. The process does not require a strong basic chemical solution to split oxygen and hydrogen from water with electricity, unlike previous systems. The proposed energy-storage system should be inexpensive and could also work with electricity from wind power. The researchers hope to develop a practical solar power system that could be available to homeowners within a decade.
Where do waves get their energy from?
ocean waves get their energy from wind, the faster the wind and the longer the fetch the bigger the waves, low pressure systems, cold fronts and other weather systems generate most waves the sun is the main source of energy though it makes the wind stronger or weaker
they are energy
What is the method of energy transformation of thermonuclear plants?
The method of energy transformation of thermonuclear plants begins with nuclear fission. The nuclear energy is then transformed to thermal energy. This energy is used to boil water which creates steam that spins a turbine. This turbine creates mechanical energy which when coupled with a generator creates electromagnetic energy, or electricity.
What is the problem with solar energy?
Solar energy, while being quite useful, can also have it's own problems. For example, how does solar energy work if you occupy a place that rains most of the time? The sun is never out so, no solar-power. Furthermore, the rate of efficiency with solar panels is only 40%, is it worth all the money that is paid for them?
What get hotter in the sun a black cup with water or a white cup?
A black cup will get hotter in the sun compared to a white cup. This is because black objects absorb more light and heat than white objects, which reflect more light. The absorbed heat will cause the black cup to warm up faster.
solar power comes from sunshine. sunshine is still free, but solar panels, on the other hand are very expensive. You could get free heat for your home by capturing free sunshine by well placed windows and thermal mass (concrete, brick, tile), for example and it will radiate heat throughout the night into your home while you are sleeping. This is an example of passive solar heating.
How did Edmund Becquerel found solar energy?
Edmund Becquerel did not "found" solar energy, but he did discover the photovoltaic effect in 1839, which is the process of converting light into electricity in a solar cell. This discovery laid the foundation for the development of solar energy technology and its applications in generating electricity from sunlight.