Here’s a simple solution to learn the way solar panels work
What exactly is solar energy ?
Solar power is radiant energy which is produced by the sun. Every single day the sun radiates, or sends out, an incredible volume of energy. The sun radiates more energy in a second than people have used since the beginning of time!
The energy of the Sun originates from within the sun itself. Like other stars, the sun is really a big ball of gases––mostly hydrogen and helium atoms.
The hydrogen atoms in the sun’s core combine to form helium and generate energy in a process called nuclear fusion.
During nuclear fusion, the sun’s extremely high pressure and temperature cause hydrogen atoms to come apart and their nuclei (the central cores of the atoms) to fuse or combine. Four hydrogen nuclei fuse to become one helium atom. But the helium atom contains less mass than the four hydrogen atoms that fused. Some matter is lost during nuclear fusion. The lost matter is emitted into space as radiant energy.
It requires countless years for the energy in the sun’s core to make its way to the solar surface, after which somewhat over eight minutes to travel the 93 million miles to earth. The solar energy travels to the earth at a speed of 186,000 miles per second, the velocity of sunshine.
Only a small portion of the power radiated by the sun into space strikes our planet, one part in two billion. Yet this volume of energy is enormous. Everyday enough energy strikes america to supply the nation’s energy needs for one and a half years!
Where does all this energy go?
About 15 percent of the sun’s energy which hits our planet is reflected back into space. Another 30 percent is used to evaporate water, which, lifted in to the atmosphere, produces rainfall. Solar energy also is absorbed by plants, the land, and the oceans. The rest could be employed to supply our energy needs.
Who invented solar technology ?
People have harnessed solar energy for hundreds of years. As early as the 7th century B.C., people used simple magnifying glasses to concentrate the light of the sun into beams so hot they would cause wood to catch fire. Over a century ago in France, a scientist used heat from a solar collector to produce steam to drive a steam engine. At first of this century, scientists and engineers began researching ways to use solar power in earnest. One important development was obviously a remarkably efficient solar boiler introduced by Charles Greeley Abbott, a united states astrophysicist, in 1936.
The solar hot water heater came into common use at this time in Florida, California, and the Southwest. The industry started in the early 1920s and was in full swing prior to World War II. This growth lasted prior to the mid-1950s when low-cost natural gas became the primary fuel for heating American homes.
People and world governments remained largely indifferent to the possibilities of solar power prior to the oil shortages of the1970s. Today, people use solar energy to heat buildings and water and to generate electricity.
How we use solar power today ?
Solar power is used in several different ways, of course. There's two standard kinds of solar energy:
* Solar thermal energy collects the sun's warmth through one of two means: in water or in an anti-freeze (glycol) mixture.
* Solar photovoltaic energy converts the sun's radiation to usable electricity.
Listed below are the five most practical and popular ways that solar power can be used:
1. Small portable solar photovoltaic systems. We see these used everywhere, from calculators to solar garden products. Portable units can be used for everything from RV appliances while single panel systems are used for traffic signs and remote monitoring stations.
2. Solar pool heating. Running water in direct circulation systems through a solar collector is a very practical way to heat water for your pool or spa.
3. Thermal glycol energy to heat water. In this method (indirect circulation), glycol is heated by sunshine and the heat is then transferred to water in a warm water tank. This method of collecting the sun's energy is much more practical now than ever. In areas as far north as Edmonton, Alberta, solar thermal to heat water is economically sound. It can pay for itself in 3 years or less.
4. Integrating solar photovoltaic energy into your home or business power. In numerous parts of the world, solar photovoltaics is an economically feasible solution to supplement the power of your own home. In Japan, photovoltaics are competitive with other types of power. In the USA, new incentive programs make this form of solar power ever more viable in many states. An increasingly popular and practical way of integrating solar energy into the power of your home or business is through the use of building integrated solar photovoltaics.
5. Large independent photovoltaic systems. When you have enough sun power at your site, you may be able to go off grid. It's also possible to integrate or hybridize your solar energy system with wind power or other types of sustainable energy to stay 'off the grid.'
How do Photovoltaic panels work ?
Silicon is mounted beneath non-reflective glass to create photovoltaic panels. These panels collect photons from the sun, converting them into DC electrical energy. The energy created then flows into an inverter. The inverter transforms the energy into basic voltage and AC electrical power.
Pv cells are prepared with particular materials called semiconductors like silicon, which is presently the most generally used. When light hits the Photovoltaic cell, a certain share of it is absorbed inside the semiconductor material. This means that the energy of the absorbed light is given to the semiconductor.
The energy unfastens the electrons, permitting them to run freely. Pv cells also have one or more electric fields that act to compel electrons unfastened by light absorption to flow in a specific direction. This flow of electrons is a current, and by introducing metal links on the top and bottom of the -Photovoltaic cell, the current can be drawn to use it externally.
Do you know the pluses and minuses of solar energy ?
Solar Pro Arguments
- Heating our homes with oil or natural gas or using electricity from power plants running with fossil fuels is a cause of climate change and climate disruption. Solar power, on the other hand, is clean and environmentally-friendly.
- Solar hot-water heaters require little maintenance, and their initial investment can be recovered in just a relatively small amount of time.
- Solar hot-water heaters can work in almost any climate, even in very cold ones. Simply choose the best system for your climate: drainback, thermosyphon, batch-ICS, etc.
- Maintenance costs of solar powered systems are minimal and also the warranties large.
- Financial incentives (USA, Canada, European states…) can aid in eliminating the price of the initial investment in solar technologies. The U.S. government, as an example, offers tax credits for solar systems certified by by the SRCC (Solar Rating and Certification Corporation), which amount to 30 percent of the investment (2009-2016 period).
Solar Cons Arguments
- The initial investment in Solar Water heaters or in Photovoltaic Electric Systems is higher than that required by conventional electric and gas heaters systems.
- The payback period of solar PV-electric systems is high, as well as those of solar space heating or solar cooling (only the solar domestic hot water heating payback is short or relatively short).
- Solar water heating do not support a direct combination with radiators (including baseboard ones).
- Some air cooling (solar space heating and the solar cooling systems) are very pricey, and rather untested technologies: solar air conditioning isn't, till now, a really economical option.
- The efficiency of solar powered systems is rather determined by sunlight resources. It's in colder climates, where heating or electricity needs are higher, that the efficiency is smaller.
About the Author - Barbara Young writes on motorhome solar power in her personal hobby blog 12voltsolarpanels.net. Her work is related to helping people save energy using solar power to lower CO2 emissions and energy dependency.
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