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Compressed air car nearing manufacture

Discussion in 'Home Power and Microgeneration' started by News, May 15, 2012.

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  1. j

    j Guest

    That's my take on it too. I think though, that you don't have to feed it
    back, but use it for the next acceleration.

    It seems to me that if you can limit the peak current drawn from the
    batteries, that you would get a longer life out of them.

    Given enough capacitor, peak torque could be impressive. The battery
    would limit the horsepower.

    At least, that is roughly how I see this. There seems to be some real
    money in sales and investments ($.5B /year). Not all of that can be
    small devices...

    Jeff
     
  2. Jim Wilkins

    Jim Wilkins Guest

    You really need to assume that the designer knows his job and matches
    the battery with the motor. Tire slip limits the maximum starting
    torque and braking deceleration.

    Perhaps these caps would permit a less expensive battery but their
    rapid voltage change complicates the electronics. They store half (or
    less) the energy of a battery of the same peak voltage and charge
    capacity because their constant-current discharge curve is a triangle
    instead of a battery's near rectangle the same height and width.

    jsw
     
  3. News

    News Guest

    I do not a version of the air car. You are senile and confused. Probably
    beyond medical help by now.
     
  4. News

    News Guest

    For regen braking and acceleration busts they appear to be feasible. The
    original 1997 Prius was to have a supercapacitors but at the last minute
    they changed to batteries.
     
  5. News

    News Guest

    I never troll. I inform you of events.
    Yes, they are looking into the manufacturing side now. It is nice you are
    getting it.
     
  6. News

    News Guest

    R&D is being done right now on battery-supercap setups. Only hydraulic
    accumulators can store most kinetic energy (90% plus) and give it back off
    immediately. Chrysler with the EPA are developing a test minvan using this
    hydraulic technology.
     
  7. News

    News Guest

    This is being used for urban stop-start trains.
     
  8. j

    j Guest

    That certainly makes sense. But it appears they have solved the complex
    electronics (buck boost mostly). Note the number of existing projects:

    http://en.wikipedia.org/wiki/Electric_double-layer_capacitor#Automotive

    I would think the winning features would be the low internal resistance
    and perhaps the low cost.

    At any rate, this was all unexpected to me, and shows how much money
    there is in the margins of saving energy. At least for large vehicles
    where the momentum lost is sizable. Toyota has a race car project
    coming out though (Toyota TS030). And the Chinese have total supercap
    buses that get a quick recharge at the stops.

    I take your point that this is not needed for acceleration.

    It's all rather interesting but I don't think it will make it into a
    grocery getter anytime soon.

    Jeff
     
  9. Jim Wilkins

    Jim Wilkins Guest

    I have a couple of inverters here at home that can fully charge a
    battery from a nearly discharged one.

    We can do incredible things in the research lab with enough funding.
    The decisions governing energy are almost always economic, except for
    national defense where Stirling engines in subs and missile and
    disposable precious-metal batteries cost less than losing your
    freedom.

    Were you Green enough to buy a Segway?

    jsw
     
  10. Jim Wilkins

    Jim Wilkins Guest

    Not sure if anyone will appreciate it, but I just found out that the
    1971-vintage HP Spectrum Analyzer I bought at a flea market depends on
    this magic crystal:
    http://en.wikipedia.org/wiki/YIG_sphere

    This one sweeps smoothly from 2 GHz to 4 GHz.

    jsw
     
  11. j

    j Guest

    I wonder how much longer Germany could have held out if it's tanks and
    planes were 20% more efficient?

    The WWII P51 Mustang gained the range needed because it was fuel
    efficient. As far as us today, the military has it's own strategic
    reserves and in flight refueling. I don't care about the mileage in an F22!
    Not me, but there are a lot of Segways here. Popular for tours.

    I'm only really green where it saves money and doesn't cost a fortune.
    For me that is solar thermal. And with the cost of water, low flow
    toilets (plug for Kohler Super Flusher).

    The odd thing about energy conservation is that this rarely benefits the
    poor who are mostly about using energy. You need to have some money to
    start with before you can think about saving some!

    Jeff
     
  12. News

    News Guest

    Not at all as they were going to get beat anyhow. British, US and Soviet
    industry just crushed the poor murdering blighters.

    The Segway inventor has spent a lot of money on improving the Stirling. He
    drives around ain Stirling-electric hybrid car and is proposing a
    Stirling-electric scooter.
     
  13. Jim Wilkins

    Jim Wilkins Guest

    In rec.aviation.military we've hashed out WW2 technology ad nauseam.
    There wasn't that much difference in technical ability because each
    side could examine the others' wreckage and test captured examples.
    The big difference was the demands of remote offense vs local defence.
    Germany never had more than a small fraction of the US and British
    ability to project power overseas, they expected and planned for a
    short, local land war. They had more trouble moving supplies by road
    and rail across Russia than we did shipping them half way around the
    world.
    I've worked on that issue and made my house and appliances
    considerably more efficient by simple, inexpensive changes like
    replacing the shower head with a sink spray that shuts off when
    released, drying laundry outdoors year-round, learning to live with a
    smaller refrigerator and opening windows to vent with night air
    instead of running the AC. I have an antenna for TV and dial-up
    internet, which save over $100 a month vs cable.

    They seem to demand too much prior planning, attention to detail and
    change to accustomed behavior for most people. For example I have to
    watch the weather forecast to plan when to do laundry, and calculate
    the dew points or comfort index of indoor and outdoor air to see if
    nighttime venting is worthwhile when the humidity is high.

    jsw
     
  14. Jim Wilkins

    Jim Wilkins Guest

    I know, but I signed a non-disclosure agreement and can't discuss it.
     
  15. News

    News Guest

    A google brings it up, so you can now :)
     
  16. Vaughn

    Vaughn Guest

    But you aren't"getting it". Despite your title to this thread, there is
    nothing in that press release to indicate that any "compressed air car"
    is "nearing manufacture" anywhere.
     
  17. Jim Wilkins

    Jim Wilkins Guest

    Yet another subject you don't understand.
     
  18. Bob F

    Bob F Guest

    Now there's a meaningless statement.
    Speaking of the devil.
     
  19. News

    News Guest

    Please speak of him if you like.
     
  20. News

    News Guest

    I did get it. I read the Tata press release. You know, about this car you
    said would never work because you did some sums.
     
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