Archive for the ‘Solar’ tag

Solar Energy Profile: Straight from the Source

Every day, the Earth receives more energy from the sun than mankind uses in a year. Still, solar energy remains a tiny sliver in the global energy mix. Falling prices and better efficiency could change this, but can it happen fast enough?When it comes to meeting energy needs, humanity has not been able to eliminate the middle man. The energy we use today comes from the sun, but we get it indirectly. Sunrays fed countless generations of plants and organisms millions of years ago, which we now use to burn to produce electricity, heat our homes, and run our cars. Its heat also strikes up the winds that we use to sail ships and run turbines. Despite our dependence on the sun, mankind has still not fully realized the potential of harnessing the sun?s vast energy directly. Worldwide Importance and Future TrendsEven with steady annual growth, the International Energy Agency says solar energy – combined with wind and geothermal power – still only supplies less than one percent of the world?s energy. In Germany, the global solar market leader, solar supplies around 0. 3 percent of national electricity demand; in the United States, it supplies less than 0. 1 percent. The UN?s annual “Global Trends in Sustainable Development” report said that the solar sector attracted 16 percent of the 70 billion U. S. dollars invested in renewable technology in 2006 – behind wind (38 percent) and biofuels (26 percent). According to the World Energy Council, solar water heating market is growing at a rate of around 20 percent a year, and solar PV at 35 percent. If the costs of solar technology continue to drop, it has a chance to compete with other forms of energy production. In places like sunny California, solar has already reached “grid parity,” which means the costs of producing solar power are now competitive with conventional energy production even without government subsidies. Sinking production costs would allow solar power to eventually join or even replace coal, gas, and oil as a primary energy source by the end of the century, which some experts say is possible. Global Resources and ProducersThe amount of solar energy that reaches the Earth?s surface every 20 days exceeds the energy trapped up in all of the planet?s coal, oil, and natural gas reserves. The trick is finding cost-effective and efficient ways of converting this abundant resource into usable energy. Currently, there are two main ways of doing so. Photovoltaic (PV) panels, thin pieces of crystalline silicon, transfer sunlight directly into electricity. Solar thermal collectors, on the other hand, are used to heat water for domestic or industrial use and to run steam power plants. Germany is the world?s leading producer of PV and solar heating technology and energy. In 2006 alone, 968 Megawatts (MW) of PV was installed in Germany. Japan, which added 292 MW last year, is also an important market and exporter of PV technology. China is aggressively adding solar systems to its energy mix. The country already consumes half of all solar-heated water in the world, and aims to increase solar water heater coverage by 50 percent by 2010. China is also emerging as an important producer and consumer of PV cells, which the government is integrating in remote and urban area. Energy OutputThe energy output of photovoltaic and solar heating depends on the size location of the system. Most areas receive ample sunlight, but deserts that seldom get cloud cover are better suited for solar energy production. Standard PV cells have an energy conversion rate of 6 to 8 percent, meaning that 6 to 8 percent of all solar power absorbed is turned into energy. Some prototypes have already achieved conversion rates of more than 40 percent, but are still too expensive for mass-market production. Solar heaters utilize solar collectors that are significantly more efficient. Current collectors turn between 60 to 70 percent of absorbed sunlight into heat. Concentrated solar thermal systems use mirrors to reflect sunlight onto a tower, producing extremely hot temperatures to boil water or other fluids and produce steam to drive a thermal power plant. An 11 MW concentrating solar power plant was completed near Seville, Spain in March 2007. A 154 MW facility is planned in Australia, and a 500 MW system in California?s Mojave Desert. Environmental Impact and DrawbacksManufacturing and installing solar systems requires energy, and as with almost any industrial activity, involves handling hazardous materials, such as arsenic and cadmium. Mass production of PV cells is sometimes marred by shortages of quality silicon. Large-scale solar power plants also take up lots of land. Overall, however, the environmental impacts of switching to solar energy are positive. Solar heaters require significantly less fossil energy input than natural gas and electric systems. PV systems are cleaner energy producers compared to coal and oil. Greenhouse gas emissions of solar PV plant including production and installation are eight times less than that of a coal-fired plant. The initial costs of solar heating and PV systems, however, prevent many homeowners from installing them. But falling costs and subsidies have helped sustain market growth in some countries. Like with wind turbines, another technical problem is effectively storing solar energy to provide power throughout nights and cloudy days.

Germany’S Bid For Solar Excellence Scuppered By Geothermal?

In 1991, a quiet but effective revolution began in Germany. It consisted of 5 paragraphs and didn’t even provide any future promises (or funding), but it gave something to the average citizen that he didn’t have before. . . commercial access to the grid. The law was entitled Stromeinspeisungsgesetz (commonly known in the U. S. as the Energy Feed-in Law). From 1991, all suppliers of electricity, including private citizens, were granted access to the electrical grid and, by law, would be compensated at an unprecedented premium for all energy sent into the network. By far, the highest commissions were paid to the suppliers of solar power, starting a race to go solar in Deutschland. ? The law was revised in 2000 and now called the Renewable Energy Sources Act to include energy supplied by geothermal derivations such as geysers, natural steam, geopressurized reservoirs, etc. Perhaps not something the average person has access to, but certainly of interest on a corporate level. Ironically, most geothermal energy is not very “renewable” as it is mined faster that it can regenerate, but it is clean and efficient. There is no mistaking that this addition was added, in fact, to attract new business to the clean energy market. More importantly, the 2000 version set a time frame for new investors to 20 years. What that achieved was the insurance and reassurance that people needed before such a huge commitment to their individual projects. On the negative side, the 20 years came with decreased tariffs over time. Why decrease the tariffs? Simply put, the government had set a ceiling of 5% total energy production by the methods outlined in the original Stromeinspeisungsgesetz. Solar panels were going up all over Germany faster that you can say “sauerbraten”. Although not funded directly by the government, budget considerations still had to be weighed as the electricity consumer picked up the tab for the subsidies. The tariff reductions simply mitigated the government’s set budget for the project. In addition, the newer law put Germany in line with the EU’s energy regulations requiring frequent review, rates reflective of overall cost, different rates based on type, different rates based on size of facility, and a generally degressively mobile payment structure. The goal of this bill was to reduce carbon emissions by 3% by 2010 and enable green electricity to become 10% of the overall energy supply by the same year. This goal was surpassed in 2007, at which point 12. 5% of total energy was green energy. ? In keeping with the EU’s standard of “frequent performance review,” the law was once again revised in 2004. This time, no great name change. It became the 2004 Renewable Energy Sources Act. Since reaching goals set in 2000 so early, this revision raises to bar to 27% by 2020. These enterprising ambitions and the tools implemented to achieve these agendas have put Germany forward as a renewable energy pioneer in terms of sheer scale. The newer law accounted for up and coming market developments and rewards for innovation in sustainable sources of power. Since the initiation of the Renewable Energy Sources Act, tariffs paid out to suppliers have been more finely tuned, promoting photovoltaic, geothermal, and biomass overall. However, payouts under this bill were dynamic with new developments and technologies. Wind power payments under the 2004 act, for example, were reduced due to a reduction in overall costs secondary to technological advances. By degressing fees paid to suppliers, the government hopes to ignite creative stream-lining innovations, which, based on fluctuating payments, rewards the design model, but saves on the long term. Another aspect of the 2004 legislation is the fixed tariff scheme. Suppliers could “lock in” a rate based on the year of initiation. The rate would be good for 20 years plus the year of commencement. Once again, this is a call to action. The sooner you’re in, the more profit you can extract. Producers of electricity are protected from future changes to the law by this key piece of the legislation. ? As of 2008, amendments in the Energy Act, or EEG (Erneubare Energien Gesetz) lessen the focus on solar production by reducing the tariff for rooftop solar panels by 8% in 2009 and 2010 and then 9% annually after that. Ground level solar parks will suffer a 10% reduction in compensation in 2009 and 2010 (a decrease of 3. 5%). Wind energy promotion is the focus of the latest revisions set forth by the governing body. So, is wind the new King of Renewables? Solar power is perhaps less heavily promoted than in the past, but one must see that as a sign of success of the program. Falling subsidies indicate that the industry is healthy and has less need for gross promotion. Is wind the next “big thing” in Germany? Don’t count out geothermals just yet. Although the “renewability” of geothermal power is in debate, geothermal drilling goes on and was given an early boost in 2000 and further support in 2004. There are currently 150 geothermal plants in the development stage held back at the moment due to the cost of the drilling equipment necessary. Not to be daunted, German manufacturing plants are expanding drill production for the sector. Six geothermal plants are in the process of opening this year (2009) and into 2010. So, what does this mean for the rest of us? Well, look at it this way. A country with relatively moderate sun exposure and no volcanic activity in 7,500 years is actually a leader in producing solar power and geothermal energy. To say that Germany is inspiring is a vast understatement. If the U. S. made a serious attempt to duplicate Germany’s success, the impact on the environment would be staggering. U. S. representative Jay Inslee from Washington state introduced the Renewable Energy Jobs and Security Act in June of 2008, but it stalled. On a brighter note, Gainesville, FL just passed a law (March 2009) to compensate providers of solar electricity at a premium rate through net metering. City officials passed this bill unanimously after studying the success in Germany. Hawaii isn’t far behind and will likely have a similar plan in effect by the end of the year. I think that this is how we are going to achieve results in the U. S. : one state at a time until the job is done. 15-Mar-09 ?

Solar Panels For My House – Blueprints DIY Solar Energy

Fortunately, more householders are also beginning to see the advantages of using green energy. I will even show you in this article how replaceable solar panels for my house have shot down my electrical bill. Normally it is determined that a typical family spends more than $1,300 on heat and electricity each year, according to the Office of Energy. I’m certain that you have recently seen some form solar panel, particularly those than run on solar panel powered calculators. With a touch more effort, they can be built cost effectively to generate sufficient electrical energy to run most households even my house! They’re capable of soaking up daylight and move to the semi-conductors for the electrons to be damaged. The cells are called photovoltaic and work to convert sunlight into electric power that may be employed to run the household appliances. How Does the Earth4Energy solar power at Home System Work and What Are Its Benefits? It harnesses the widely available sun energy to free the house owner from ever having to depend on the power company for electricity. It might be running our houses and companies in the future. Does my DIY solar panels energy for my house actually work? The panels truly work by breaking loose the electrons and moving them in a certain way which generates an electric current output. This is truly one of the best ways to generate energy in your home while going green and saving a bunch of money.

Solar Power Electricity Generation-Tips for Solar Power Electricity Generation

The best thing about solar power is that it has an unlimited potential. Discover the easiest method of solar power electricity generation so that you can easily go solar and save $1000?s on utility bills forever. You just need to know how to make your own renewable energy source and today I am going to tell you exactly how to generate solar electric power. If you want to learn solar power electricity generation, you’ll need to learn some basics on how exactly do solar panels work. This way, the entire procedure will be much easier to handle. The process starts with solar modules. They are the main components exposed directly to sunlight. Their main function is to convert the sun’s energy into usable electrical power for your home appliances. To get them correctly installed, solar modules are to be mounted on a steel frame and positioned on your roof top. Power produced by the solar modules is converted from Direct Current (DC) to Alternating Current (AC) through a inverter. Usually, Alternating Current (AC) is the usable electrical power that we need to power the home appliances. Next, the electrical power transfers from the inverter to the electrical service panel. The electrical service panel is used for distributing the electrical power to different parts of your house or office for use. The unused electrical power produced by the solar panels will then be brought into the grid all the way through the utility electric meter. As a result, the meter will be made to spin backwards and this establishes a credit with the utility company in offsetting future usage. This method is known as Net Metering and is completely approved by State Level Electricity Policy. Solar power electricity generation isn’t really a difficult task. You don’t require many skills beyond being able to handle wiring & basic tools with care and safety measures. The components needed for building solar panels include:-1. ??? Solar Cells2. ??? Sheet Plywood3. ??? Copper Wire4. ??? General Tools (Drills, screwdrivers, woodwork glue etc)5. ??? Clear PVC SheetingAll these components can be easily picked up by you from the local hardware store. Photovoltaic cell is the only component that you might have to search online and it can be found easily on eBay. Quality directions that are easy to follow are vital to find when trying to generate solar power. This will make the building process less stressful and make you happier that you made the choice to do it yourself. Online is just one of the places you are able to find some of these manuals. We have reviewed the best guides available to help you to learn how to build your own solar panel system for electricity. Go ahead and check them out NOW??learn solar power electricity generation and STOP paying for electricity?FOREVER!

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