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Setting up a Power Cell demonstration.

Forum Old Man/Woman's Club : Other - Setting up a Power Cell demonstration.

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For an independant study, I am setting up demonstrations for Power Cell use. I have to have a demo that the kids can do in the lab. The instructor already has the equipment, any suggestions as to what to do with it? I need to write a proposal this weekend.

What's the frequency, Kenneth?

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Where are the engineers this weekend?
They could have a go at this subject.
Fossil fuels as a means for power production is so environmentally crazy, we must find nonpolluting solutions.
Isn't the power cell based on hydrogen/oxygen reactions and non polluting. Bravo!

Nostradamus: "In the year 2002 naked alien women will descend to earth"

Reply to pike

Supposedly, one of his fuel cell demonstation kits can run on either alcohol or hydrogen, while the rest are hydrogen-only. In practicality the Alcohol version is best, because alcohol is easier to store than compressed hydrogen.

Some fuel cells designed for Alcohol can also use Gasoline. The practical implication is that fueling stations would not need to change their facilities, and higher percentages of alcohol could be phased in which would still support older vehicles with internal combustion engines, reducing our dependance on fossil fuels.

The problem with Alcohol and Gasoline is that they are hydrocarbons, when the Hydrogen is used for power, something must be done with the Carbon. The best method is to convert it to Carbon Dioxide, which is non-toxic and good for vegitation, but still a greenhouse gas.

Some advantages of fuel cells exist even when used with hydrocarbons. For one, even fairly crude fuel cells are about twice as efficient for powering vehicles than piston-driven internal combustion engines. The cell itself can be three times as efficient, but some energy is lost to friction converting it back to mechanical energy through electric motors.

Another advantage that exist even when using hydrocarbons is that no Oxides of Notrogen or Carbon Monoxide is formed. These are the toxic products of engine exhaust, and the main reason why they are considered a better alternative than turbine/electric hybrids that can also be made as efficient.

Of course the "cool" factor is that they are virtually silent.

So anyway, I need to set up lab experiments for these students to perform using the equipement we have, which is composed of several demonstration kits. Any suggestions?

What's the frequency, Kenneth?

Reply to Crashman

Like I said a chemical or even mechanical engineer would have ideas overflowing on this topic most probably. It's a little out of my ligue. Don't know want the demonstration kits consist of but the following ideas are what come to mind:
-comparissons with small 4 cycle gas generators. ! hour run. calculate fuel consumed, eletric power produced. you need chemical formulas for the calculation of gases formed in the combustion :monoxyde and some sulfur gases. how does the fuel cell compare in this trial run.
-yes a dicibel meter would be interesting. perhaps medical supply stores have or rent these.
-the generation of heat for each sys may be a factor
-conceptualizing the application on for example a scooter may be undertaken. Weight, size, fuelling, drive mechanics, safety etc
It's a tough one, but interesting and necessary

Nostradamus: "In the year 2002 naked alien women will descend to earth"

Reply to pike

Maybe I could have them calculate the efficiency based on the volume of hydrogen used and the wattage of output? But I wouldn't know where to begin with that! Which is the type of help I need. These experiments have to be things someone with basic knowledge of math can perform in a two hour class period.

What's the frequency, Kenneth?

Reply to Crashman

"already has the equipment"

What's the equipment? There's a difference between a kilowatt fuel cell and a dekawatt cell. And what are you wanting to show? The raw power output? Size/Efficiency? Safety issues?

I've seen them melt a crowbar (most impressive power output), turn a 'whole-house' fan for about 14 hours straight (size/efficiency). And I've seen videos of someone shooting the housing with a .22 rifle (safety).

Reply to ejsmith2

More like "watt" sized cells, these are sized for educational demonstrations. But I think I could show how much power was produced from a given amount of fuel, need ideas to set that up and any other ideas for simple experiments.

What's the frequency, Kenneth?

Reply to Crashman

To calculate efficiency:

1 pound hydrogen contains 52,000 BTU

1 kilowatt-hrs = 3,412.14 BTU

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Reply to mousepotato

But how much energy is required to extract one pound of hydrogen from water?

<font color=red><i>Happy Canuck</i>!</font color=red> ' :wink: '

Reply to zpyrd

Well, I guess, at 100% effiency it would take 52,000BTU or 15.24kWh.

But, according to <A HREF="http://www.eren.doe.gov/consumerinfo/refbriefs/a109.html" target="_new">this page</A>, using the standard method of electrolysis (dropping electrodes in water), " Producing one cubit foot of hydrogen requires 0.14 kilowatt-hours (kWh) of electricity (or 4.8 kWh per cubic meter)". <A HREF="http://www.cnes.fr/WEB_UK/decouverte/quitter_terre/1sommaire_quitter_terre.htm" target="_new">This page</A> says "One cubic meter of hydrogen weighs only 90 g". The calc says it takes 5.04 cubic meters to make a pound (453.6g = 1 lb).

5.04m³ * 4.8kWh/m³ = 24.192kWh

So, it seems that process is 63% efficient, if my math and sources are sound.

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My posts are even more useful when printed on a roll of Charmin®.

Reply to mousepotato
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