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 solar program. Show all posts
Showing posts with label solar program. Show all posts

Thursday, June 4, 2009

Wind Energy The Pros And Cons By Erwin Mackintosh

Wind Energy The Pros And Cons By Erwin Mackintosh
Don Quijote might have difficulty tilting at the huge, modern windmills responsible for harnessing wind energy and converting it into electricity. And, present-day windmills certainly aren't as appealing to the eye as the picturesque, black-and-white structures of Cervante's day.

But, unappealing as they may look, they are, in fact, the fastest-growing form of energy generators in the World, and help resolve one of mankind's most serious problems: that of finding environmentally-friendly and renewable fuel sources to meet our increasingly high energy demands.

So, let's take a closer look at wind power... its advantages, plus any disadvantages it may have.

Advantages

* Clean and Renewable. The fossil fuels of coal, oil and gas harm our environment by contributing carbon dioxide to the atmosphere. They are also unsustainable, meaning that they'll run out one day. Wind, on the other hand, will always be around, and it won't pollute the atmosphere.

* Cost Effective. Energy created by wind turbines used to cost more than that created by fossil fuels. But, larger blades have cut the costs, making them equal to fossil fuels. What's more, as technology advances, costs should be even further reduced.

* Quick To Set Up. Once a suitable site has been chosen and the appropriate permission granted, wind farms take very little time to actually build.

* Land Still Usable. The land surrounding the wind turbines can also be used for other purposes, such as agriculture.

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However, as with everything, drawbacks always exist...

Disadvantages

* Unsightly. Most people would agree that the idea of using wind power is a good one. But, in practise, very few want these large, unappealing constructions in their vicinity.

* Noisy. The turbine blades also make quite a lot of noise.

* Harmful To Wildlife. Wind turbines can be hazardous to creatures that fly, such as birds.

Although there are drawbacks, remedies for them are constantly being studied, improvements made, and new blades invented to render the process more cost-effective.

The World is in desperate need of good alternative sources of power, to enable us to end our long-standing dependence on fossil fuels. Wind energy is an excellent option.

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