Energy Education

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This article refers to hydrogen as a [[molecule]], H<sub>2</sub>; this molecule isn't produced in nature on Earth and must be made by people in a lab or industrial facility. Although molecular hydrogen is the most common [[molecule]] in the universe, it's hard to tell exactly how much there is.<ref> http://ned.ipac.caltech.edu/level5/Combes3/Combes4.html accessed December 17th, 2014</ref> This is distinct from [[atom]]s of [[hydrogen]], which occur in great abundance on Earth and elsewhere in the universe.
[[File:fuelcell.png|300px|thumb|Figure 1. A diagram of a hydrogen fuel cell. The hydrogen and oxygen combine to form water, while simultaneously producing electricity.<Ref>Wikimedia Commons [Online], Available: https://commons.wikimedia.org/wiki/File:Solid_oxide_fuel_cell.svg#/media/File:Solid_oxide_fuel_cell.svg</ref>]]
[[File:Fuelcell.jpg|300px|thumb|Figure 2. A fuel cell vehicle configuration.<Ref>Wikimedia Commons. "Fuelcell" by Welleman, [Online], Available: https://commons.wikimedia.org/wiki/File:Fuelcell.jpg#/media/File:Fuelcell.jpg</ref>]]


<onlyinclude>'''Hydrogen''' can be seen as '''energy currency''' since it does not naturally occur in its molecular form on Earth, and it must be made by inputting some [[energy]]. This turns it into a [[secondary fuel]] (a high density repository of energy that's easier to transport and use).</onlyinclude> Primary energy is needed to create hydrogen fuel. This energy comes either from burning [[fossil fuel]]s (or potentially [[nuclear power]], which David S. Scott wrote about extensively),<ref name=Scott> Scott, "Smelling Land," 1st edition, Vancouver, Canada: Canadian Hydrogen Association, 2007</ref> or by using [[intermittent electricity]] sources like [[solar power]] and [[wind power]] to provide the necessary [[energy]]. While it may not sound like an [[efficiency|efficient]] use of energy to do this, hydrogen fuel is around ten times more [[energy density|energy dense]] by volume than [[Lithium-ion battery|Lithium-ion batteries]], and more than 100x more energy dense by mass! This means that in the future, if infrastructure changes, many "alternative" sources of primary energy, like [[wind]] and [[solar power]], may be used, the energy they create stored in hydrogen fuel, which is far more efficient than [[battery|batteries]].
This article refers to hydrogen as a [[molecule]], H<sub>2</sub>. This molecule isn't produced in nature on Earth and must be made by people in a lab or an industrial facility. Although molecular hydrogen is the most common [[molecule]] in the universe, it's hard to tell exactly how much there is.<ref> http://ned.ipac.caltech.edu/level5/Combes3/Combes4.html accessed December 17th, 2014</ref> This is distinct from [[atom]]s of [[hydrogen]], which occur in great abundance on Earth and elsewhere in the universe.


While hydrogen is an [[energy currency]], rather than a [[primary energy]] source, it is still considered to be a [[fuel]] (although not a primary energy source, it's a material with a high [[energy density]] source of electricity that can easily be transported. Hydrogen is used in one of two ways: either in an [[internal combustion engine]] (burning it), or by reacting it directly with oxygen in a [[fuel cell]] to create [[electricity]] and run an [[electric motor]]. The former powers rockets, and the latter is how [[hydrogen-powered car]]s work.
<onlyinclude>'''Hydrogen''' can be seen as '''energy currency''' since it does not naturally occur in its molecular form on Earth, and is made by inputting some [[energy]], see figure 1. This turns it into a [[secondary fuel]] (a high density repository of energy that's easier to transport and use).</onlyinclude> Primary energy is needed to create hydrogen fuel. This energy comes either from burning [[fossil fuel]]s, using [[nuclear power]] (which David S. Scott wrote about extensively),<ref name=Scott> Scott, "Smelling Land," 1st edition, Vancouver, Canada: Canadian Hydrogen Association, 2007</ref> or by using [[intermittent electricity]] sources like [[solar power]] and [[wind power]]. While it may not sound like an [[efficiency|efficient]] use of energy to do this, hydrogen fuel is about ten times more [[energy density|energy dense]] by volume than [[lithium-ion battery|Lithium-ion batteries]], and more than 100x more energy dense by mass! This means that in the future, if infrastructure changes, many "alternative" sources of primary energy, like [[wind]] and [[solar power]], may be used. Then the energy they create can be stored in hydrogen fuel, which is far more efficient than [[battery|batteries]].
 
While hydrogen is an [[energy currency]] rather than a [[primary energy]] source, it is still considered to be a [[fuel]] (although not a primary energy source). This is because it's a material with a high [[energy density]], making it an easily transportable source of electricity. Hydrogen is used in one of two ways: either in an [[internal combustion engine]] (burning it), or by reacting it directly with oxygen in a [[fuel cell]] to create [[electricity]] and run an [[electric motor]]. The former powers rockets, and the latter is how [[Alternative fuel vehicle#Fuel Cell Vehicle (FCV)|hydrogen-powered car]]s work, like in Figure 2.


Some authors<ref name= Scott/> feel that hydrogen is an inevitable energy currency, while others<ref>McMahon, "Emperor's New Hydrogen Economy" 1st edition,  iUniverse, Inc., 2006</ref> feel quite strongly otherwise.
Some authors<ref name= Scott/> feel that hydrogen is an inevitable energy currency, while others<ref>McMahon, "Emperor's New Hydrogen Economy" 1st edition,  iUniverse, Inc., 2006</ref> feel quite strongly otherwise.
==For Further reading==
*[[Hydrogen]]
*[[Energy currency]]
*[[Fuel cell]]
*[[Alternative fuel vehicle#Fuel Cell Vehicle (FCV)|Hydrogen-powered car]]
*[[Primary energy]]
*[[Secondary fuel]]
*Or explore a [[Special:Random|random page]]
==References==
==References==
{{reflist}}
{{reflist}}
[[Category:Uploaded]]
[[Category:Uploaded]]

Revision as of 17:37, 20 July 2018

Figure 1. A diagram of a hydrogen fuel cell. The hydrogen and oxygen combine to form water, while simultaneously producing electricity.[1]
Figure 2. A fuel cell vehicle configuration.[2]

This article refers to hydrogen as a molecule, H2. This molecule isn't produced in nature on Earth and must be made by people in a lab or an industrial facility. Although molecular hydrogen is the most common molecule in the universe, it's hard to tell exactly how much there is.[3] This is distinct from atoms of hydrogen, which occur in great abundance on Earth and elsewhere in the universe.

Hydrogen can be seen as energy currency since it does not naturally occur in its molecular form on Earth, and is made by inputting some energy, see figure 1. This turns it into a secondary fuel (a high density repository of energy that's easier to transport and use). Primary energy is needed to create hydrogen fuel. This energy comes either from burning fossil fuels, using nuclear power (which David S. Scott wrote about extensively),[4] or by using intermittent electricity sources like solar power and wind power. While it may not sound like an efficient use of energy to do this, hydrogen fuel is about ten times more energy dense by volume than Lithium-ion batteries, and more than 100x more energy dense by mass! This means that in the future, if infrastructure changes, many "alternative" sources of primary energy, like wind and solar power, may be used. Then the energy they create can be stored in hydrogen fuel, which is far more efficient than batteries.

While hydrogen is an energy currency rather than a primary energy source, it is still considered to be a fuel (although not a primary energy source). This is because it's a material with a high energy density, making it an easily transportable source of electricity. Hydrogen is used in one of two ways: either in an internal combustion engine (burning it), or by reacting it directly with oxygen in a fuel cell to create electricity and run an electric motor. The former powers rockets, and the latter is how hydrogen-powered cars work, like in Figure 2.

Some authors[4] feel that hydrogen is an inevitable energy currency, while others[5] feel quite strongly otherwise.

For Further reading

References

  1. ↑ Wikimedia Commons [Online], Available: https://commons.wikimedia.org/wiki/File:Solid_oxide_fuel_cell.svg#/media/File:Solid_oxide_fuel_cell.svg
  2. ↑ Wikimedia Commons. "Fuelcell" by Welleman, [Online], Available: https://commons.wikimedia.org/wiki/File:Fuelcell.jpg#/media/File:Fuelcell.jpg
  3. ↑ http://ned.ipac.caltech.edu/level5/Combes3/Combes4.html accessed December 17th, 2014
  4. ↑ 4.0 4.1 Scott, "Smelling Land," 1st edition, Vancouver, Canada: Canadian Hydrogen Association, 2007
  5. ↑ McMahon, "Emperor's New Hydrogen Economy" 1st edition, iUniverse, Inc., 2006
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