Amazing Energy Belt Turns Excess Body Fat Into Electricity

December 28, 2012 by  
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Are you worried about those extra pounds gained over Christmas? Here is a conceptual eco-design that could deal with that dilemma by converting excess body fat into energy. Dutch designer Emmy van Roosmalen says the Energy Belt could be used to power everything from cell phones to pacemakers, cutting down on electricity costs while reducing the wearer’s size. Read the rest of Amazing Energy Belt Turns Excess Body Fat Into Electricity Permalink | Add to del.icio.us | digg Post tags: “sustainable energy” , Accessories and Fashion , belt , body fat , Ducth Design Week , dutch design , Emmy van Roosmalen , energy belt , green products , renewable energy , The Nano Supermarket

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Amazing Energy Belt Turns Excess Body Fat Into Electricity

How does a bicycle powered generator work

August 22, 2011 by  
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Bipin Bhaskaran Nair: Bicycle Powered Generator Producing renewable energy What is it? When scientists discovered that power generating houses are the leading polluters of the world, coupled by the fact that the electricity tariff has sky-rocketed, a demand came in from the money-conscious customers out there, for a cheap source of power to light their homes. Then the engineers out there thought, why not all be health conscious as well? So, why not convert some extra calories in you belly, to electricity. This idea is being implemented to help produce power by utilizing a bicycle. Many of you will consider it to be something far-fetched and impractical. Many of you may give pleasant arguments. But, one thing is for sure. Nothing can limit the progress of technology. This is what is dealt in the piece of work. Materials required As the thumb-rule of engineers say, all the products should be cheap, simple and at the same time effective. So the contents presented is a method of making a simple version. 1) A cycle. 2) A small dynamo of 24 volts power. 3) A torch bulb, 24 volts rating(To prevent overheating, in case.) 4) Belt-drive All you need to do is to remove the back wheel and connect the belt with the wheel rim. Make sure that the diameter of the belt is of the size as the rim thickness. Else slip can occur and this will result in loss of efficiency. The other end of the belt should be coupled with the pulley of the rotor. The cycle should be erected on its stands, so that it remains stable. Connect the bulb to the dynamo using copper wires. Make sure that the dynamo is of single phase. Else, selection of a proper phase may be a problem. Also ensure that there is no electrical leakage from the dynamo. This is from the point of view of user safety. How does it work? With the connections done in the way mentioned above, the model is ready for use. When the person starts to pedal, the rotational force s transferred from the wheels to the pulley of the dynamo. This then sets the rotor of the dynamo into action. So, according to Faraday’s Law of electromagnetic induction, mechanical work gets converted into electric power. This can be seen from the shimmering of the bulb filament. For the beginners, this assignment may seem to be a mammoth task. But you should not be disheartened by failures. Never hesitate to take a professional help, wherever required.

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How it works: Lithium air battery

August 22, 2011 by  
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Disha Bhatt: Lithium Air Battery Electric battery for future cars Lithium-air batteries were proposed for vehicular propulsion in the 1970s because of their potentially high specific power and high specific energy. More recently, these batteries have attracted attention for military applications. Lithium provides the highest specific energy, compared to any of the common metals used in metal/air batteries. Furthermore, Li-air batteries are capable of achieving high specific power under well-controlled conditions. Because of the reactivity of Lithium with water, Li-air batteries with aqueous electrolyte cannot be electrically recharged. What is Li-air battery? Lithium-air batteries are complex electrochemical systems consisting of a porous electrode allowing oxygen from the air to be reduced, a negative electrode of a pure lithium metal and an electrolyte which is an organic solvent with a lithium salt. This combination gives a high energy density. Lithium-air cells operate at reasonably high coulombic efficiencies because of the relative chemical stability of Lithium in water. The in situ formation of a surface oxide (hydroxide) film on lithium metal retards rapid corrosion after the surface film is formed. However, at open circuit potentials corrosion is rapid, resulting in low electrochemical efficiencies. Thus, the electrolyte is drained from these cell during standby. How does it work? The typical operating temperature of alkaline Lithium-air batteries is limited to less than 100° C because of the vapor pressure of the aqueous electrolyte and the low melting point (179° C) of lithium. The cathode in a lithium-air or lithium-oxygen battery constitutes a complex chemical system and the desired electrochemical reactions only take place at the preferred sites. These sites are known as three phase boundaries, where the presence of oxygen (gas phase), carbon (solid phase) and electrolyte (liquid phase) are connected. Some parameters which have shown to influence the lithium-oxygen battery performance are the type of carbon and binder used in the cathode, the electrode composition and its porosity, the oxygen solubility and the electrolyte composition. When pure and dry oxygen is used, two discharge reactions take place: 2Li + O2 —–> Li2O2 ( E0 = 3.10 V ) 4Li + O2 —–> 2Li2O ( E0 = 2.91 V) Cathode reaction: H2O + e- —-> OH- + 1/2 H2 Latest development: The electrolyte vaporization and anode hydrolysis are limiting the capacity of Lithium-air batteries, therefore different ionic hydrophobic liquids have been investigated due to their resistance to water and low evaporation rates. Lithium-air batteries have been modified nowadays, which combine the properties of a molten-salt battery and a solid electrolyte fuel cell. These cells would surely bring out a green revolution.

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How it works: Lithium air battery

Stinging Nettle Thrives in Netherlands

November 6, 2009 by  
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Who is king on stinging nettle fabric?

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Stinging Nettle Thrives in Netherlands

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