Re: eer

From: Bill Bowden (wrongaddress_at_att.net)
Date: 09/16/04

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    Date: 15 Sep 2004 19:48:22 -0700

    feerguy9@cs.com (FEerguy9) wrote in message news:<20040915030108.07779.00000486@mb-m25.news.cs.com>...
    > >Actually, using some of these ultrathin crystals, an AA size
    > >capacitor can store 252 joules. Check this link:
    > >
    > >http://physics.unl.edu/directory/ducharme/ducharme.html
    > >
    > >"The third breakthrough is the setting of a record dielectric strength.
    > >The ultrathin crystals are able to sustain record high electric fields of
    > >over
    > >three billion volts per meter, potentially making them the world's highest
    > >energy capacitors, able to store hundreds of times as much energy per unit
    > >weight as ordinary capacitors, and ten as much as storage batteries.
    > >The ferroelectric polymer capacitors could replace batteries in a wide range
    > >of devices, ranging from electric vehicles to cell phones to laptops,
    > >and could also replace some of the trillions of discrete capacitors
    > >installed every year in electronic devices. "
    > >
    > >3 billion volts per meter is about 647 Joules per cubic inch if the
    > >dielectric constant is 1. An AA size capacitor is 0.39 cu inch or
    > >252 J which is about 10% the capacity of a ni-cad AA battery.
    > >So, it looks like the dielectric constant needs to be about 10 for
    > >the capacitor to equal the energy density of a ni-cad battery.
    > >Another 4X is needed for an alkaline cell.
    > >
    > >-Bill
    >
    > ONE for eer!
    >
    > Thanks!
    >
    >
    > Frank

    Yes Frank, score 1 for eer using a super dielectric.
    But so what? Everybody knows a better dielectric
    makes a better capacitor and the plate surface
    area doesn't matter. So why don't you quit posting
    that nonesense about larger capacitance and plate surface
    area (the heart of eer) and do some research to find
    out how big your capacitor has to be using what dielectric
    to power your EV a couple miles? Then give us a report
    about what you find out. And big means volume, not plate area.
    Area has little to do with it.

    -Bill

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