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LYogi

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  • Molycorp misses by $0.01, misses on revenue [View news story]
    $400M in secured financing, 10% dilution.
    Aug 6 04:08 PM | Likes Like |Link to Comment
  • Tesla's Real Problem: Energy Density [View article]
    Like I said that was then, this is now. And the now is always changing:

    http://tek.io/1pCoyvm
    Aug 6 12:27 PM | Likes Like |Link to Comment
  • Ballard and Anglo American Launch Field Trial of Fuel Cell Home Generator in Rural South Africa [View article]
    massive potential in areas of the world facing climate uncertainty, poverty, and unreliable electricity.
    Aug 5 08:52 PM | Likes Like |Link to Comment
  • Tesla's Real Problem: Energy Density [View article]
    that was then, this is now and now when you hear hydrogen think electrolysis, wind, solar
    Jul 31 10:44 AM | Likes Like |Link to Comment
  • Tesla's Real Problem: Energy Density [View article]
    because of range limitation with BEV and long recharging times...
    Jul 31 10:42 AM | Likes Like |Link to Comment
  • Tesla's Real Problem: Energy Density [View article]
    @Lensman

    I appreciate your replies...I am taking what you are relaying into consideration.

    Perhaps you could comment on this article when you have a chance:

    http://bit.ly/1AzCYlY

    Thanks
    Jul 30 03:21 PM | Likes Like |Link to Comment
  • Tesla's Real Problem: Energy Density [View article]
    you keep citing this article from 2006...things have changed since that time regarding production of Hydrogen.

    from the comments of the article:

    This isnt the whole truth. The reason we will, and should, convert water into hydrogen dispite the costs is that a battery powered car isnt capable of riding 300 miles on one charge. Moreover, when it runs out it takes a while to recharge those batteries.

    Hydrogen doesn""t have these problems. Next to the fact that a fuel cell is better for the environment then any batterypack hydrogen is easier to refill and with pressurising one can store much more energy on board of a vehicle then batteries.
    Reforming methanol into hydrogen first even increases its efficiency to your car from 22% for a standard engine to 37% for all processes needed to power your car with hydrogen as its fuel. (This includes your fuel cell and engine but leaves out transport.)

    **********

    Batteries have better efficiency but hydrogen can increase performance. I personally think we will use hydrogen in the future but that we can still argue about ;)


    Everyone working in renewable energy pretty much knows that there is no mono-technology future, but a multi-technology supported energy infrastructure in the future. Hydrogen, regardless of where it comes from, provides a reasonable approach to be part of the solution. Whatever the "electron" approach refers to will also be part of this future, not the only solution.


    ******
    his article makes some very questionable assumptions in its analysis.

    1) All of the energy used to electrolyze water must come from electricity generated on the grid, and electrolysis is the way all hydrogen will be produced.

    False. The majority probably will, but chemicals like titanium dioxide reduce that energy when exposed to sunlight, a technology which is being patented as I type. Furthermore, electrolysis is not required for all methods of hydrogen generation, though the remainder generate carbon dioxide. The article claims Mr. Bossel evaluated many ways of producing hydrogen, but I don't see any evidence of this in his other remarks. And last, hydrogen can be generated with solar cells on site.

    2) Hydrogen must be transported long distances in pipes to its destination refuel station.

    Hydrogen is being generated onsite by electrolysis in Iceland. The only things we need to generate hydrogen are electricity, water, and possibly organic compunds, all of which are easily shipped with today's infrastructure.

    3) Hydrogen must be stored as a compressed gas or liquid.

    This is the least likely method of easy hydrogen storage in the future, although it's what we use today. Hydrogen will likely be stored bonded to metals, carbon nanostructures, or ammonia borane, which is easy since it is such a small atom that it takes almost no room in bonded form. The only trouble is getting it to bond and unbond at will, but this is much closer today than in the past. See http://tinyurl.com/pnn....

    4) People will wait hours to recharge their pure electric car or external, replaceable battery packs will become commonplace.

    Yeah, and the world is flat. And if you believe that, I've got some magic beans to sell you.

    ************

    I was always a bigger fan of the H2, because of the energy density issue. Unless they can find a miracle battery, it doesn't hold a candle to H2 in terms of density. Check out: http://tinyurl.com/lgr...

    While you're at it, look at the energy density of Diesel. Its volumetric density is 10,942 WH/l compared to 405 WH/l for 150 bar H2. Lithium batteries are around 300 and very expensive.

    Since algae can be grown to make bioDiesel, I think that will be the fuel of the future once fossil fuels are used up.

    Yeah, it makes CO2, but it also was sequestered in the fuel when it was made. Besides, CO2 won't cause runaway warming anyway. I don't drink that bitter koolaid.
    Jul 28 09:58 PM | Likes Like |Link to Comment
  • Tesla's Real Problem: Energy Density [View article]
    http://bit.ly/1tUA4ng
    Jul 28 08:49 PM | Likes Like |Link to Comment
  • Tesla's Real Problem: Energy Density [View article]
    Future is Hydrogen.
    Jul 28 08:47 PM | Likes Like |Link to Comment
  • Tesla's Real Problem: Energy Density [View article]
    Has everyone forgotten that Europe and Asia are turning to hydrogen?
    Jul 28 03:02 PM | Likes Like |Link to Comment
  • Tesla's Real Problem: Energy Density [View article]
    that's it in a nutshell.
    Jul 25 09:59 PM | Likes Like |Link to Comment
  • Tesla's Real Problem: Energy Density [View article]
    Until hydrogen comes along and wipes them out ;)
    Jul 25 09:34 PM | 2 Likes Like |Link to Comment
  • Tesla's Real Problem: Energy Density [View article]
    don't let that hiccup dissuade you from listening to the important debate below.
    Jul 25 09:16 PM | Likes Like |Link to Comment
  • Tesla's Real Problem: Energy Density [View article]



    amen to that Ron
    Jul 25 09:00 PM | Likes Like |Link to Comment
  • Tesla's Real Problem: Energy Density [View article]
    @wonder

    If the energy to create hydrogen fuel comes from renewable sources such as wind, solar (which is already being done via electrolysis) then you have portable, instant, power available with no carbon footprint.

    Envision every home with a device that creates hydrogen and fuels their car based on solar electrolysis and you may begin to see why many are very excited about the prospects of a Hydrogen economy.
    Jul 25 06:27 PM | Likes Like |Link to Comment
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