Tag Archive: electricity


Water Powered Vehicles

I guess many of you have heard about vehicles run by water, i also know that many of you have thought that this is confined to a concept and dosent work in real time….but if you go through this article u will be convinced to accept that it is true….

Yes, you can run your car on water. All it takes is to build a “water-burning hybrid” is the installation of a simple, often home-made electrolysis cell under the hood of your vehicle. The key is to take electricity from the car’s electrical system to electrolyze water into a gaseous mixture of hydrogen and oxygen, often referred to as Brown’s Gas or HHO or oxyhydrogen. Typically, the mixture is in a ratio of 2:1 hydrogen atoms to oxygen atoms. This is then immediately piped into the intake manifold to replace some of the expensive gasoline you’ve been paying through the nose for these last couple of months. These simple “kits” will increase your fuel economy and decrease your bills and dependence on foreign petroleum by anywhere from 15 to 300 percent.

Benefits

If water cars could be developed and used by every person then we would have no need to have for gas stations, oil refineries and tankers. There would be no much more require for drilling for oil. The corner gas station would be a distant memory. In addition, the Ozone layer would return to pre-industrial conditions with out any holes and the smog would disappear. Our environment would be a lot cleaner.

Water cars are cheaper. Water costs a lot less than gasoline. And it is quite effortless to get water to fill up your car.

Water cars are significantly better for the environment as they create no emissions. As a result they will not contribute to global warming.

Water is always being produced. It is very unlikely the earth will ever run out of water. And making use of a water-powered vehicle it may support the environment. Water cars, using a procedure known as electrolysis, send oxygen into the atmosphere. The oxygen can bind with hydrogen in the atmosphere to item water in the form of rain and snow.

Disadvantages

Water cars, if they came on the market, would be extremely costly as they cost a lot to generate. Even so, there are developers working to make a less expensive vehicle.

The water cars that are becoming developed these days still use what is called brown gas and it is mixed with water utilizing a approach referred to as electrolysis to produce power for the car. So this sort of water card would still need gasoline. Even so a lot much less gas would be required and it would not have to be as refined to do its job.

There are some skeptics that say the concept of a water vehicle is one large scam and is an impossibility. Only time will tell as there are folks that believe in this procedure and are diligently working to create an powerful and reasonably priced water powered vehicle.

Water cars may well still a dream of the future. However, if they do come to fruition, these amazing low pollution vehicles will be the answer to high gas and oil costs. They will really contribute to the well being of our environment.

These days however we can only rely on conservative driving to get us where we want to go. Or, better however the foot-powered bicycle is a excellent alternative to save on gas and avoid pollution or look to public transportation and shoe leather as alternate means of transportation until the water car is ready for the market.
courtesy :waterpoweredcar.com,popularmechanics.com,idieinclusiva.org

Posted by

Mahesh ( MGIT ECE 4th year )

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The technological world of the 21st century owes a tremendous amount to advances in electrical engineering, specifically, the ability to finely control the flow of electrical charges using increasingly small and complicated circuits. And while those electrical advances continue to race ahead, researchers at the University of Pennsylvania are pushing circuitry forward in a different way, by replacing electricity with light.

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Solar Power Without Solar Cells

A dramatic and surprising magnetic effect of light discovered by University of Michigan researchers could lead to solar power without traditional semiconductor-based solar cells.

The researchers found a way to make an “optical battery,” said Stephen Rand, a professor in the departments of Electrical Engineering and Computer Science, Physics and Applied Physics.

In the process, they overturned a century-old tenet of physics.

“You could stare at the equations of motion all day and you will not see this possibility. We’ve all been taught that this doesn’t happen,” said Rand, an author of a paper on the work published in the Journal of Applied Physics. “It’s a very odd interaction. That’s why it’s been overlooked for more than 100 years.”

Light has electric and magnetic components. Until now, scientists thought the effects of the magnetic field were so weak that they could be ignored. What Rand and his colleagues found is that at the right intensity, when light is traveling through a material that does not conduct electricity, the light field can generate magnetic effects that are 100 million times stronger than previously expected. Under these circumstances, the magnetic effects develop strength equivalent to a strong electric effect.

“This could lead to a new kind of solar cell without semiconductors and without absorption to produce charge separation,” Rand said. “In solar cells, the light goes into a material, gets absorbed and creates heat. Here, we expect to have a very low heat load. Instead of the light being absorbed, energy is stored in the magnetic moment. Intense magnetization can be induced by intense light and then it is ultimately capable of providing a capacitive power source.”

What makes this possible is a previously undetected brand of “optical rectification,” says William Fisher, a doctoral student in applied physics. In traditional optical rectification, light’s electric field causes a charge separation, or a pulling apart of the positive and negative charges in a material. This sets up a voltage, similar to that in a battery. This electric effect had previously been detected only in crystalline materials that possessed a certain symmetry.

Rand and Fisher found that under the right circumstances and in other types of materials, the light’s magnetic field can also create optical rectification.

“It turns out that the magnetic field starts curving the electrons into a C-shape and they move forward a little each time,” Fisher said. “That C-shape of charge motion generates both an electric dipole and a magnetic dipole. If we can set up many of these in a row in a long fiber, we can make a huge voltage and by extracting that voltage, we can use it as a power source.”

The light must be shone through a material that does not conduct electricity, such as glass. And it must be focused to an intensity of 10 million watts per square centimeter. Sunlight isn’t this intense on its own, but new materials are being sought that would work at lower intensities, Fisher said.

“In our most recent paper, we show that incoherent light like sunlight is theoretically almost as effective in producing charge separation as laser light is,” Fisher said.

This new technique could make solar power cheaper, the researchers say. They predict that with improved materials they could achieve 10 percent efficiency in converting solar power to useable energy. That’s equivalent to today’s commercial-grade solar cells.

“To manufacture modern solar cells, you have to do extensive semiconductor processing,” Fisher said. “All we would need are lenses to focus the light and a fiber to guide it. Glass works for both. It’s already made in bulk, and it doesn’t require as much processing. Transparent ceramics might be even better.”

In experiments this summer, the researchers will work on harnessing this power with laser light, and then with sunlight.

courtesy: howstuffworks

Posted by

Mahesh ( MGIT ECE 3rd year)



Generate Electricity by Walking

What if we could generate electricity just by walking? Kohei Hayamizu, a Japanese engineer, has been working on this idea beginning with a technology system he developed in graduate school. The system makes use of piezoelectricity, “a property certain materials have to generate an electric current when they are squeezed or pressed.”

His first experiment took place in Japan’s Shibuya train crossing last month in which he converted one square meter of the ground into an electricity generator. Each time a person walks over the area, electricity is generated. Over 20 days, with 900,000 people passing through Shibuya each day, he was able to generate enough energy to power 1,422 televisions for one hour. Hayamizu thinks that similar systems could be installed on a wide range of scales, from small systems embedded on mobile phones, to huge systems installed on highways that would harness the electricity generated by the movement of cars and big trucks   His hope is to install miniature “heel-strike” generators underneath the stairs that would capture the power generated by a person as they walk down the tower. His ultimate goal is to install them in every rail station, shopping center and even in your shoes! According to Webb, if these generators were to be installed at the Victoria Underground Station in central London, the power generated by the 34,000 people moving around would be able to power approximately 6,500 lightbulbs. The technology also has application beyond the small steps. Plans are afoot to look into installing these devices in the tower itself, to harness energy from the swaying movement of the building!   Another natural fit for this technology would be to have your shoes generate energy as you walk (at least enough to power your own devices – mobile phone, camera, etc). As early as 2000, John Sarich developed a prototype that did just that.

 

 

The shoes have a small generator attached to water-filled soles. Each step puts pressure on the soles, causing the water to spin a small turbine and generate power

 

 

The futuristic shoes currently generate 1.2 watts of electricity, “a level sufficient to run an iPod mobile music player forever, as long as the wearer keeps walking,” “The shoes do not have a power-storage function, but you would be able to charge a mobile phone automatically or talk on it forever as long as you connect the phone to your shoes and just keep walking.

Courtesy: http://www.emilychang.com

 

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