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Fuel Cells.

By: Ashlee, Anisha & Nelsen.
by

Ashlee Verma

on 2 May 2011

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Transcript of Fuel Cells.

FUEL CELLS.
- The positive electrolyte is called the anode, and the negative electrolyte is called the cathode. The reactants flow into the cell, and the reaction products flow out of it, while the electrolyte remains within it.

- They can operate continuously as long as the necessary reactant and oxidant flows are present.

- This forms an electrical circuit and the currents go from the cell to the object being powered and then back to the cell again (in a circuit motion).

- Fuel cells use hydrogen and oxygen to cause chemical reactions which are used for charging the cell.




- hydrogen is not that abundant in the atmosphere.

- Although the city has Green movements it would be beneficial to convert from gas powered technology to fuel cell technology.

- It would cause less pollution, less noise and be better for the environment. It would reduce CO2 emitions by a huge amount.

- Cars could be run on fuel cells instead of gasoline, and so could many other forms of transportation, entertainment and advertisement.

- It would cost hundreds of millions to billions of dollars to convert, which is the
disadvantage to this conversion plan. However, it is a lot cleaner, quieter and practical
in the long term, compared to oil.

- Fuel cell APUs in Class 8 trucks can save 670 million gallons of diesel fuel per year and 4.64 million tons of CO2 per year.

- In the U.K. the London Transportation System has introduced fuel cell powered buses into the city, because of the unhealthy atmosphere they had due to CO2 emissions. Heat Capacity & Usefullness?

- Fuel cells offer the ability to generate electricity and heat at the point of use.

- With most traditional electical infrastructure, large amounts of heat are produced, but not used effectively.

- A coal-fired power station can be as low as 30% efficient (effectively, for every 3 lumps of coal you put in, you’re only getting the energy from one of them) and most of the waste is lost via heat (cooling towers).

- This electricity is then used to generate heat in the home (electric boilers, heaters, hobs and kettles) which is extremely inefficient.

- By generating the electricity at the point of use the heat that is produced can by used to heat buildings from as small as houses to as large as skyscrapers.

This is usefull because, applications of the fuel cell can achieve 80-90% efficiency. In domestic applications fuel cell can reduced overall energy demand by 30%.

- Over the years, the fuel cell was taken by scienctists and was improved so that is lasted longer, and had more power.
Storage of Fuel Cells?

- The fuel cell is a metal hydride canister that has the system inside of it.

- Some stores have canisters that can be refilled, and is available when high capacity solid hydrogen canisters need to be refilled. What does a fuel cell do? What is a fuel cell? History of Fuel Cells?
- Electrochemical cell that converts a source fuel into an electric current through reactions with an oxidant and the presence of elecrolyte.
- Fuel cells always have two electrolytes, where one is positive and one is negative.

- Fuel cells can produces electrical currents that can power objects outside of the cell. For example..... lights, motors, engines Transportation

- Fuel cell vehicles create the least pollution of all vehicles that consume fuel directly.

- Neither conventional pollutants nor green house gases are emitted. The only products are water and heat.

- The simple reaction that takes place inside the fuel cell is highly efficient. Even if the hydrogen is produced from fossil fuels, fuel cell vehicles can reduce emissions of carbon dioxide, by more than half.
- runs quietly - would cost billions of dollars to switch from oil power to hydrogen fuel cells. - hydrogen is a very flammable gas. - its production would create a lot of pollution. (CO2) - will run forever as long as there is a fuel source. Advantages and Disadvantages to Fuel Cells
- much less complex than conventional gas engines.

- durable. (does not easily break down from corrosion, weather, etc)
Advantages:
Disadvantages:

- Fuel cells were discovered more than 160 years ago, by an English scienctist, Sir William Grove. Half a century later in 1932. Francis T. Bacon had created the first practical fuel cell.

Then, by 1952 Bacon was able to demonstrate a 5k-W alkaline fuel cell that powered a two ton capacity tow truck and a 20 horse-power fuel-cell-powered tractor.

- Now, fuel cell development is greatly stimulated by NASA's need for on-board electrical power for the spacecrafts. Total Conversion Plan. We chose New York as the city for our plan to convert to fuel cell technology
because it one of the largest and busiest cities in the world and so it is responsible
for a lot of pollution.
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