Biofuels have been around as long as cars have.

A biofuel is a fuel that contains energy from geologically recent carbon fixation. These fuels are produced from living organisms.

Generating Electricity from Wing Waves.

Wind turbines, like windmills, are mounted on a tower to capture the most energy. At 100 feet (30 meters) or more aboveground, they can take advantage of the faster and less turbulent wind.

Producing electricity from solar energy.

Solar energy is a free, inexhaustible resource, yet harnessing it is a relatively new idea. The ability to use solar power for heat was the first discovery.

Turbines catch the wind's energy with their propeller-like blades.

A blade acts much like an airplane wing. When the wind blows, a pocket of low-pressure air forms on the downwind side of the blade.

Solar energy may have had great potential

Solar technology advanced to roughly its present design in 1908 when William J. Bailey of the Carnegie Steel Company invented a collector with an insulated box and copper coils.

We have been harnessing the wind's energy for hundreds of years.

For utility-scale sources of wind energy, a large number of wind turbines are usually built close together to form awind plant.

Biofuels are produced from living organisms.

In order to be considered a biofuel the fuel must contain over 80 percent renewable materials.

Geothermal energy is the heat from the Earth.

Resources of geothermal energy range from the shallow ground to hot water and hot rock found a few miles beneath the Earth's surface, and down even deeper to the extremely high temperatures of molten rock called magma.

Geothermal heat pumps can tap into this resource to heat and cool buildings.

A geothermal heat pump system consists of a heat pump, an air delivery system (ductwork), and a heat exchanger-a system of pipes buried in the shallow ground near the building.

In the future, civilization will be forced to research and develop alternative energy sources.

Possession of surplus energy is, of course, a requisite for any kind of civilization, for if man possesses merely the energy of his own muscles, he must expend all his strength - mental and physical - to obtain the bare necessities of life.

Showing posts with label photovoltaic panels. Show all posts
Showing posts with label photovoltaic panels. Show all posts

Friday, December 16, 2011

Opinion We Need More Onshore Wind Turbines Not Less

Opinion We Need More Onshore Wind Turbines Not Less
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Hadyard Hill Wind Farm, Scotland. Photo credit: Wikipedia.

By Anders Lorenzen"


Travelling through the countryside of Germany and Denmark, there is hardly at any point you can't see any wind turbines spinning in the background. Even in deeply conservative Texas, in the US, wind turbines are becoming a more dominant factor in the landscape and here is the thing - people like it.

In the UK despite relatively few onshore wind turbines having been put up, (with the majority being in Scotland who could gain independence from the UK later this year) right wing politicians and some noisy groups, which are in the minority, are putting up a big fight against them. The number one argument being used is that they spoil the countryside and to back that up, arguments are also being made that they are inefficient and that they kill birds.

The real threats to the British countrysideTheir arguments could not have been more flawed as they forgot to mention that the countryside has already been spoiled, destroyed and polluted by intensive farming and it could be about to suffer another blow, as fracking is set to take off. Unlike fracking and intense farming a wind turbine poses no harm to the natural environment. When they're taken down at the end of their lifetime (typically 25 years) there would have been no impact on wildlife and the countryside. Though this can't be said for farming or fracking. The amount of pesticides that the majority of farmers are using these days not only pollutes the soil that wildlife depend on, but also contributes to the die off of pollinating bees and insects. Laws that require farmers to plant hedgerows of wildflowers that attracts bees and pollinating insects do not exist. On fracking, let's just assume (which is very unlikely) that there won't be any spills, the amount of chemicals pumped into the ground to extract gas, will mean that when every available unit has been extracted, it would have had a severe impact on the countryside - the sheer scale of industrialization that fracking brings would also contribute to drive away wildlife.

Wind is workingThe other myths that they don't work or they cause the killing of birds is nothing but a myth. Sure enough, there have been some instances where birds have flown into turbines and been killed. But so have they been killed flying into pylons, but the real staggeringly high number of birds killed is due to increased industrialization, intense farming, and pollution from traffic and fossil fuel powered plants. I find it hard not to laugh when people say wind turbines don't work. One would just have to look at how much electricity Denmark and the UK get from wind power on windy days - the data is being published by the national grids and is available to anyone.

Love fracking, hate windDespite the people opposing wind is only a minority, the Tories plan on introducing moratorium on future onshore wind farms coming into effect by 2020. Though it is yet to be confirmed by the party, it is expected that in the 2015 manifesto that the Conservatives will go to election on there would be a moratorium on onshore wind turbines. Their sentiments are that it has been self defeating to have an energy technology which is so unpopular. In contrast, despite fracking currently being the most unpopular energy technology in the UK, with public support declining, the government are committed that this will happen whether the public like it or not.

Offshore instead of onshoreDespite these developments, the government still claims they are a leader on green energy singing their praises on their achievements in solar energy and offshore wind power. To be fair let's give the government a bit of credit for their achievements on offshore wind and solar. However, we have to seriously question the economic sense in giving up onshore wind as years of investments have made it the cheapest form of renewables we can install today. The same is happening with offshore wind as countries are starting to deploy it, but it's not quite there yet, it still remains expensive and it will be a while before costs have come down to those of onshore wind power. While we should keep investing in offshore wind which will drive down the costs, giving up on onshore wind is simply insanity.

We do however have to be more clever about how it is deployed. Installing it in less attractive areas makes sense, such as industrial areas and close to busy roads. The planning process should also be sped up; it's insane how long time proposals can linger in the system before they're even being looked at.

In Denmark and Germany, while there have been some people against onshore wind, it has been drowned by the supporters, and the main political parties on the left and the right also remain in strong support of the technology. While in Texas it has given farmers suffering from devastating droughts an alternative income.

"Sub edited by Charlotte Paton"

Related news:


Denmark in world wind power record

US wind power sees record growth