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Ankita Katdare
Ankita Katdare • Oct 22, 2009

Colloquium: Fuel Cells in Reducing Global Warming - Questions/Discussions

Kaustubh Katdare
Kaustubh Katdare • Oct 25, 2009
Hello arjun_rp,

The following question is based on the slide #6 in your presentation. The slide mentions the impact of Global warming on environment. Could you explain following two points from the slide a bit in more detail?-

1. Expansion of desert region.
2. Ozone layer depletion.

On slide #15, you mention that "It generates more electricity for the same amount of fuel".

We'd like you to tell us more about it and any comparisons you'd like to make to prove your point.

Please feel free to ask for any clarifications you may need. We look forward to your answers.
cooltwins
cooltwins • Oct 26, 2009
nice presentation arjun_rp,:smile:


undisrupted supply of energy: how reliable can it be? mind explaining...?
high efficiency: it may be efficient but one has to look at the space constraints. looks it does take up a lot of space....

correct me if i am wrong :smile:
arjun_rp
arjun_rp • Oct 27, 2009
Ozone layer depletion :

Ozone layer filters out harmful UV radiations from the sunlight.Ozone is a form of oxygen.The molecule of oxygen contains two atoms whereas ozone contains three oxygen atoms.UV rays decomposes molecular oxygen into atomic oxygen

o2+UV->o+o

This atomic oxygen rapidly reacts with molecular oxygen to form ozone

o+o2+UV->o3

The net result of the above reaction is equilibrium.This equilibrium is disturbed by reactive atoms of carbon,sulphur etc.This destroys the ozone molecules and results in thinning of ozone layer called ozone layer depletion


Expansion of desert regions :

Global warming affects all the vegetation like forests,shrubs etc. It also reduces the crop yeild and it reduces the annual rainfall.The increase in temperature will destroy the vegetation and this can transform a entire forest to desert.Thus it expands the desert area
arjun_rp
arjun_rp • Oct 27, 2009
The_Big_K
Hello arjun_rp,

The following question is based on the slide #6 in your presentation. The slide mentions the impact of Global warming on environment. Could you explain following two points from the slide a bit in more detail?-

1. Expansion of desert region.
2. Ozone layer depletion.

On slide #15, you mention that "It generates more electricity for the same amount of fuel".

We'd like you to tell us more about it and any comparisons you'd like to make to prove your point.

Please feel free to ask for any clarifications you may need. We look forward to your answers.





Ozone layer depletion :

Ozone layer filters out harmful UV radiations from the sunlight.Ozone is a form of oxygen.The molecule of oxygen contains two atoms whereas ozone contains three oxygen atoms.UV rays decomposes molecular oxygen into atomic oxygen

o2+UV->o+o

This atomic oxygen rapidly reacts with molecular oxygen to form ozone

o+o2+UV->o3

The net result of the above reaction is equilibrium.This equilibrium is disturbed by reactive atoms of carbon,sulphur etc.This destroys the ozone molecules and results in thinning of ozone layer called ozone layer depletion


Expansion of desert regions :

Global warming affects all the vegetation like forests,shrubs etc. It also reduces the crop yeild and it reduces the annual rainfall.The increase in temperature will destroy the vegetation and this can transform a entire forest to desert.Thus it expands the desert area.


More electricity for same amount of fuel :

When hydrogen and oxygen is bubbled from the anode and cathode,electron concentration increases considerably due to the anode cell reaction.This generates more electricity.
arjun_rp
arjun_rp • Oct 27, 2009
cooltwins
nice presentation arjun_rp,:smile:


undisrupted supply of energy: how reliable can it be? mind explaining...?
high efficiency: it may be efficient but one has to look at the space constraints. looks it does take up a lot of space....

correct me if i am wrong :smile:


In a fuel cell ,hydrogen is continuously supplied through the anode and oxygen is continuously supplied through the cathode.This gives a continuous supply of electrons.Hence it provides undisrupted power until the flow of hydrogen and oxygen is stopped.Therefore it is highly reliable when compared to other batteries or cells.Also in fuel cells there are no moving parts, that can be an incredibly reliable source of energy.



The fuel cell can be reduced to a low dimensional cell by condensing the thickness to several microns by "Thin film battery technology".
Thin film can be prepared by

1.Chemical vapour deposition
2.Sputtering
3.Pulsed layer deposition
4.Thermal evaporation
cooltwins
cooltwins • Oct 28, 2009
arjun_rp
The fuel cell can be reduced to a low dimensional cell by condensing the thickness to several microns by "Thin film battery technology".
Thin film can be prepared by

1.Chemical vapour deposition
2.Sputtering
3.Pulsed layer deposition
4.Thermal evaporation
ok i get it.😁
but can you be sure that this reduction in size won't affect the efficiency, which is the prime advantage of the fuel cell?😕
arjun_rp
arjun_rp • Oct 29, 2009
cooltwins
ok i get it.😁
but can you be sure that this reduction in size won't affect the efficiency, which is the prime advantage of the fuel cell?😕

Yes,the reduction in size wont affect the efficiency of the cell.The performance of the battery is only related to the properties of the materials that form the electrodes.


Prime Advantage:


  • When compared to other energy sources like oil,petrol etc ,hydrogen is the cleanest fuel,that when used in combustion engines produce only water vapour as a by product.This eliminate pollution caused by burning fossil fuel.This thereby reduces Global Warming.

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