Power of Sun
In childhood, everyone must have recite this line, ‘Sun rise in the east and set in west’. A very common line which may or may not have influence the curiosity among students at that age. Decades ago and even till now, it has been the prime deity to be worshipped for the people of India or in some other countries. Admittedly, as a major source of light and temperature, it never fails to amaze us how a yellow dwarf star, full of different gases,temperatures as hot as 3.6 million degrees Fahrenheit (about 2 million degrees Celsius) at closest approach till now, helps every plant and species on earth and may be other planets to grow and survive. Expeditions carried out by any space centre to get its full details or to have at least one close glimpse are yet to be successful in this technologically advanced era. Indeed, sun deserves to be prayed. Isn’t it?
Although, we are not yet successful for getting each detail of this prime star of our solar system, we have tried our full potential to reap its benefits. In history, we have evidences of using its ray to evoke fire which is a main source of survival then and even now, only more sources are introduced in today’s world. The importance of sun is not limited to it, the connection and interactions between the Sun and Earth drive the seasons, ocean currents, weather, climate, radiation belts and aurorae. Few very interesting points about sun have come up from a recent publication from NASA –
Biggest– If the Sun were as tall as a typical front door, Earth would be about the size of a nickel.
Most Massive – Being the biggest in size, it makes up 99.8 percent of the mass of the entire solar system.
Different Spins- At the equator, the Sun spins once about every 25 days, but at its poles the Sun rotates once on its axis every 35 Earth days.
Hot Ball – As a star, the Sun is a ball of gas (92.1 percent hydrogen and 7.8 percent helium) held together by its own gravity.
The major energy that is gifted by the sun or that we are able to acquire is the solar power or solar energy. It slowly started to gain importance all over the world but its usage have already reached at an advance stage in most of the developed countries. We can see the solar plates in most of the main roads, in terraces even this technology becomes really popular in many gadgets. However, the usage of solar energy is not new. The use of energy from the sun goes back a long way. Before we discovered that the sun’s light could be collected to produce electricity, people took advantage of it in other ways. Passive design reduces or eliminates the need for auxiliary heating or cooling and has been used by civilizations for millennia.
Ancient Greeks and Egyptians, as well as Native Americans, built homes and cities to have the most energy efficient sun exposure. They faced their buildings south, like we do with our solar panels.Greek and Roman architecture developed with solar energy in mind. Porticos – series of thick and evenly spaced pillars – were built in order to let sunlight filter through. This allowed for the right amount of light and heat to come through.It wasn’t until the 19th century that we began turning the sun’s light into electrical energy. In 1839, French Physicist Alexandre Edmond Becquerel discovered the photovoltaic (PV) effect. The PV effect is the creation of electric charge as the result of exposure to light through the stimulation of electrons in metals such as selenium or platinum as conductors.
Solar energy is a renewable energy which has many advantages. Its technology depends on either it is an active solar or passive solar depending on how they capture and distribute solar energy or convert it into solar power. Its usages are so many, as a source for cooking, to generate electricity with solar cells or heat engine, as a medium of power to use in transportation, advanced wearable techs like health devices or devices used for entertainment or for information, as a medium of lighting , or using PV as thermal energy.
Although, despite the great advances made in solar technology, it was not commercially viable at first due to its high price. As hard as it may be to believe, the initial push to lower the cost of solar came from oil companies. They recognized the future financial difficulty of sustaining energy production with oil. So, they started to invest in solar. Since 2008, solar power has become increasingly popular as a renewable form of energy, as its price became affordable to a much wider market.
Research and investment in solar technology continues at an energetic pace, with no shortage of engineers and innovators. Solar manufacturers continue to pursue technological improvements to make solar panels more efficient and less expensive. But negative points for using this as an extensive alternative source for daily use is still not affordable.While the most expensive part of going solar is paying for the equipment, it still only represents 25 percent of the overall expense. Soft costs, or the outlays that installers spend just trying to find you and appeal to you, also contribute a significant percentage.The National Renewable Energy Lab (NREL) has completed a number of pricing analyses of the cost of a residential solar installation.
The lab broke down the total price of buying a solar energy system for one’s house as related to the total number of watts that the system should produce (a calculation sometimes referred to as the gross cost per watt.) The Lab then went on to break down that per watt cost into smaller subcategories.At the time of this writing, the installed cost of solar panels was between$7-$9 per watt: A 5 kW system would cost around $25,000-$35,000. Many utility companies offer incentives, and some subsidize as much as 50% of system costs.
However, more and more homes are being built to utilize or deflect this type of solar energy. Solar Thermal: Technology for harnessing the sun’s heat. One use is to heat water on small or large scale. Solar Photovoltaic: Technology for producing electricity from the sun using solar cells, typically encased in panels.By using it,you can help protect the environment now and for future generations by producing your own clean solar energy.
Every solar power system installed decreases the amount of fossil fuels needed to generate electricity, which in turn reduces the pollutants contributing to global warming.Solar energy is completely renewable. It eliminates the use of fossil fuels, which are the primary source of greenhouse gases and the leading engine of global warming. The energy emitted by the sun is abundant and available everywhere. Solar is completely sustainable and environmentally friendly in nearly every way.