It helps the government in proposing policies and strategies for petroleum conservation, aimed at reducing excessive dependence of the country on oil requirement. PCRA aims at making oil conservation a national movement. Over the years, PCRA has enlarged its role in improving productivity in use of various sources of energy, for the purpose of achieving environment protection and sustainable development. The demand of petroleum products in the country is growing steadily and Govt. With solar now providing less than one percent of the world's energy, that would take "a massive but not insurmountable scale-up," NYU's Hoffert and his colleagues said in an article in Science.
At present levels of efficiency, it would take about 10, square miles 25, square kilometers of solar panels—an area bigger than Vermont to satisfy all of the United States' electricity needs. But the land requirement sounds more daunting than it is: Open country wouldn't have to be covered. All those panels could fit on less than a quarter of the roof and pavement space in cities and suburbs. Wind, ultimately driven by sun-warmed air, is just another way of collecting solar energy, but it works on cloudy days. One afternoon I stood in a field near Denmark's west coast under a sky so dark and heavy it would have put my own solar panels into a coma.
But right above me clean power was being cranked out by the megawatt. A blade longer than an airplane wing turned slowly in a strong south breeze. It was a wind turbine. The turbine's lazy sweep was misleading.
Each time one of the three foot Tip speed can be well over miles an hour kilometers an hour. This single tower was capable of producing two megawatts, almost half the entire output of the Leipzig solar farm. In Denmark, turning blades are always on the horizon, in small or large groups, like spokes of wheels rolling toward a strange new world. Denmark's total installed wind power is now more than 3, megawatts—about 20 percent of the nation's electrical needs.
All over Europe generous incentives designed to reduce carbon emissions and wean economies from oil and coal have led to a wind boom. The continent leads the world in wind power, with almost 35, megawatts, equivalent to 35 large coal-fired power plants. North America, even though it has huge potential for wind energy, remains a distant second, with just over 7, megawatts. With the exception of hydroelectric power—which has been driving machines for centuries but has little room to grow in developed countries—wind is currently the biggest success story in renewable energy.
He's director of project development for a Danish energy company called Elsam.
He means not only the number of turbines but also their sheer size. In Germany I saw a fiberglass-and-steel prototype that stands feet It's not just a monument to engineering but also an effort to overcome some new obstacles to wind power development.
One is aesthetic. England's Lake District is a spectacular landscape of bracken-clad hills and secluded valleys, mostly protected as a national park. But on a ridge just outside the park, though not outside the magnificence, 27 towers are planned, each as big as the two-megawatt machine in Denmark. Many locals are protesting. Danes seem to like turbines more than the British, perhaps because many Danish turbines belong to cooperatives of local residents.
It's harder to say "not in my backyard" if the thing in your backyard helps pay for your house. But environmental opposition is not the only trouble facing wind development. Across Europe many of the windiest sites are already occupied. So the five-megawatt German machine is designed to help take wind power away from the scenery and out to abundant new sites at sea. Many coastlines have broad areas of shallow continental shelf where the wind blows more steadily than on land and where, as one wind expert puts it, "the seagulls don't vote. It costs more to build and maintain turbines offshore than on land, but an underwater foundation for a five megawatt tower is cheaper per megawatt than a smaller foundation.
Hence the German giant. There are other challenges. Like sailboats, wind turbines can be becalmed for days. To keep the grid humming, other sources, such as coal fired power plants, have to stand ready to take up the slack. But when a strong wind dumps power into the grid, the other generators have to be turned down, and plants that burn fuel are not quickly adjustable. A wind-power bonanza can become a glut.
Importance of energy conservation
Denmark, for example, is sometimes forced to unload power at uneconomic rates to neighbors like Norway and Germany. What's needed for wind as well as solar is a way to store a large energy surplus. Technology already exists to turn it into fuels such as hydrogen or ethanol or harness it to compress air or spin flywheels, banking energy that can later churn out electricity. But most systems are still decades from becoming economically feasible. On the plus side, both wind and solar can provide what's called distributed energy: They can make power on a small scale near the user.
You can't have a private coal plant, but you can have your own windmill, with batteries for calm days. The more houses or communities make their own wind power, the smaller and cheaper central power plants and transmission lines can be. In Europe's big push toward wind power, the turbines keep growing.
But in Flagstaff, Arizona, Southwest Windpower makes turbines with blades you can pick up in one hand. The company has sold about 60, of the little turbines, most of them for off-grid homes, sailboats, and remote sites like lighthouses and weather stations. At watts apiece they can't power more than a few lights. But David Galley, Southwest's president, whose father built his first wind turbine out of washing machine parts, is testing a new product he calls an energy appliance.
It will stand on a tower as tall as a telephone pole, produce up to two kilowatts in a moderate wind, and come with all the electronics needed to plug it into the house. Many U.
Except for the heavy loads of heating and air-conditioning, this setup could reduce a home's annual power bill to near zero. In Germany, driving from the giant wind turbine near Hamburg to Berlin, I regularly got an odd whiff: the sort-of-appetizing scent of fast food.
It was a puzzle until a tanker truck passed, emblazoned with the word "biodiesel. Germany uses about million gallons 1. Biomass energy has ancient roots. The logs in your fire are biomass. But today biomass means ethanol, biogas, and biodiesel—fuels as easy to burn as oil or gas, but made from plants. These technologies are proven. Ethanol produced from corn goes into gasoline blends in the U.
In the U. What limits biomass is land. Photosynthesis, the process that captures the sun's energy in plants, is far less efficient per square foot than solar panels, so catching energy in plants gobbles up even more land. Estimates suggest that powering all the world's vehicles with biofuels would mean doubling the amount of land devoted to farming.
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At the National Bioenergy Center, scientists are trying to make fuel-farming more efficient. Today's biomass fuels are based on plant starches, oils, and sugars, but the center is testing organisms that can digest woody cellulose, abundant in plants, so that it too could yield liquid fuel. More productive fuel crops could help as well.
How Does Saving Energy Help The Environment - Save On Energy Blog
One is switchgrass, a plant native to North America's prairies that grows faster and needs less fertilizer than corn, the source of most ethanol fuel made in the U. It also thrives on land unfit for other crops and does double duty as a source of animal food, further reducing the pressure on farmland. But technically possible doesn't mean politically feasible.
From corn to sugarcane, all crops have their own lobbyists.
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Frankly, one of the biggest challenges with biomass is that there are so many options. Nuclear fission appeared to lead the race as an energy alternative decades ago, as countries began building reactors. Worldwide, about plants now generate 16 percent of the planet's electric power, and some countries have gone heavily nuclear. France, for instance, gets 78 percent of its electricity from fission. The allure is clear: abundant power, no carbon dioxide emissions, no blots on the landscape except an occasional containment dome and cooling tower.
But along with its familiar woes—the accidents at Three Mile Island and Chornobyl, poor economics compared with fossil fuel plants, and the challenge of radioactive waste disposal—nuclear power is far from renewable. The readily available uranium fuel won't last much more than 50 years. Energy conservation should be rooted in the behavior of every human being to get more effect towards the plan of energy conservation.
One can save the energy by deeply taking care of it such as turning off the unnecessarily running fans, lights, submersible, heater, combining car trips or other electric things of daily usage. These are the more easier and efficient way to save extra uses of energy thus playing the great role towards the campaign of national energy conservation.
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