Wind energy is a pollution-free,
infinitely sustainable form of energy. It doesn’t use fuel; it
doesn’t produce greenhouse gasses and it doesn’t produce toxic or
radioactive waste.
Wind farms can cause climate change, according to new research, that shows for
the first time the new technology is already pushing up temperatures.
Usually at night the air closer to the ground becomes colder when the sun goes
down and the earth cools.
But on huge wind farms the motion of the turbines mixes the air higher in the
atmosphere that is warmer, pushing up the overall temperature.
Most folks don’t realize the depth of the economic problem that fuels cells pose for mass adoption. Often there are price quotes running in the tens or hundreds of thousands of dollars. That’s because the catalysts of choice are the noble metals platinum or palladium. These are very rare metals, more so than gold and have considerable market presence already in the automotive field.
We are working to produce biofuels that are low cost, low carbon, sustainable and able to fulfil the world’s transportation fuel needs on a large scale without compromising food production
There already many biodiesel fuel uses, and as technology continues to develop,
so do the opportunities to replace traditional fossil fuels with this viable
alternative.
Wind is formed when heats over a large area, causing the air to expandand causing a pressure change. When a low pressure system runs into a high pressure system, it causes a change in the air resulting in wind
A fuel cell produces electricity directly from the reaction of hydrogen and oxygen. The only byproduct is water. A fuel-cell vehicle utilizes the electricity produced by the fuel cell to power motors at the vehicle's wheels. Fuel-cell vehicles are similar to battery-electric vehicles in that they are powered by electricity, but they do not have to be recharged like battery vehicles.
he energy from the sun varies from place to place and is very dependent on weather conditions. Without
an atmosphere 1.4 KW/m2 per hour is available, but with an atmosphere
we can only count on 1KW/m2 per hour in the absence of clouds. So, if
asked how much 3 hours of sunlight on one square meter is worth what would you
say?
Solar Energy is better for the environment than traditional forms of energy.
Solar energy can also be used to heat swimming pools, power cars, for attic fans, calculators and other small appliances. It produces lighting for indoors or outdoors.
Accounting for only 5 percent of the world's population, Americans consume 26 percent of the world's energy.
Biofuel, based on fuel derived from organic biomass from recently living animals
or plants or their byproducts, has transformed from a niche alternative to
fossil fuels (e.g., gasoline, diesel) to become a booming industr
The term “biofuels” encompasses a wide range of fuels, including vegetable oils, animal fats, ethanol, biodiesel (any oil or fat that undergoes
transesterification to more closely resemble mineral-based fuel), and synfuel
(fuel made from gasified organic matter, then liquefied to form fuel). The main
common trait of all these fuels is that they are derived from organic biomass,
rather than minerals.
Biodiesel (mono alkyl esters) is a cleaner-burning diesel fuel made from natural, renewable sources such as vegetable oils. Because it is renewable and domestically produced, biodiesel fits well under the Energy Policy Act of 1992, which is in place to help ensure national energy security through replacing imported petroleum products with domestic alternative fuels.
How Does Wind Energy Work?
The diagram below shows a simplified version how a wind turbine converts the kinetic energy in the wind to electrical energy around the country. If you can't see the diagram you will need to download flash to see it.
The wind blows on the blades and makes them turn.
The blades turns a shaft inside the nacelle (the box at the top of the turbine)
The shaft goes into a gearbox which increases the rotation speed enough for...
The generator, which uses magnetic fields to convert the rotational energy into electrical energy. These are similar to those found in normal power stations.
The power output goes to a transformer, which converts the electricity coming out of the generator at around 700 Volts (V) to the right voltage for distribution system, typically 33,000 V.
The national grid transmits the power around the country.
Through the use of hydrogen together with fuel cell technology it is possible to achieve a radical decrease in local pollution of carbon dioxide, nitrogen oxides and particles from the transportation sector. Although the production of hydrogen from fossil fuels affects the environment it is an advantage that the carbon dioxide emissions can be separated already on the production site. This becomes evident when hydrogen is used as vehicle fuel, avoiding pollution from every individual vehicle.The only emission from a fuel cell reacting with hydrogen is pure water. The environmental gains are high, provided that pollution in the hydrogen production process is kept low. A fuel cell is approximately twice as energy efficient as a combustion engine if used in a regular car. The effect is that, using the same amount of energy, a fuel cell car can drive twice as far as a car with a combustion engine can.
"The blades of the turbine are attached to a hub that is mounted on a turning shaft. The shaft goes through a gear transmission box where the turning speed is increased. The transmission is attached to a high speed shaft which turns a generator that makes electricity."