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Topic: Superconducters< Next Oldest | Next Newest >
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CatKnight Search for posts by this member.
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PostIcon Posted on: May 22 2001,11:13  Skip to the next post in this topic. Ignore posts   QUOTE
are actually replacing some powerlines today! the technology has been improved so that the wiring will only cost about โ per meter (compared to ษ for regular copper wires). this will lead to uber fast internet connections and also help the power outages in california eventually.
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masher Search for posts by this member.
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PostIcon Posted on: May 22 2001,11:35 Skip to the previous post in this topic. Skip to the next post in this topic. Ignore posts   QUOTE
Do you know what the superconductor is?

------------------
"Once you have pulled the pin from Mr. Grenade, he is no longer your friend."
-Unknown (cited in nene, 2001)

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Dark Knight Bob Search for posts by this member.
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PostIcon Posted on: May 22 2001,12:08 Skip to the previous post in this topic. Skip to the next post in this topic. Ignore posts   QUOTE
guy who came from my school is working on something like that with some big ass power company that involves using the electro conductivity of a crystaline structure and finding a way to implement it into power cables.

This message has been edited by Dark Knight Bob on May 23, 2001 at 07:10 AM

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CatKnight Search for posts by this member.
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PostIcon Posted on: May 22 2001,13:51 Skip to the previous post in this topic. Skip to the next post in this topic. Ignore posts   QUOTE
its a ceramic composed of bismuth, strontium, calcium, copper and oxygen, surrounded by silver.
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damien_s_lucifer Search for posts by this member.
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PostIcon Posted on: May 22 2001,16:09 Skip to the previous post in this topic. Skip to the next post in this topic. Ignore posts   QUOTE
how do they plan to keep 1000's of miles of superconducting cable cold? last I heard they hadn't got anything to superconduct above liquid nitrogen temperatures.
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CatKnight Search for posts by this member.
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PostIcon Posted on: May 22 2001,16:11 Skip to the previous post in this topic. Skip to the next post in this topic. Ignore posts   QUOTE
liquid nitrogen isn't all that expensive. infact I think the actual quote from the guy was that it's "cheaper then kool-aid". before this new composite however, they had to use liquid helium which is very expensive.
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damien_s_lucifer Search for posts by this member.
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PostIcon Posted on: May 22 2001,18:47 Skip to the previous post in this topic. Skip to the next post in this topic. Ignore posts   QUOTE
That's cool. It hadn't occurred to me that a superconducting cable wouldn't need to be that thick. Hmm... they're still gonna need a pumping station every few miles, though. But since something like 60-70\% of the power is lost just in transport from the plant to the home, I don't suppose it will be hard to justify the added cost - since it would effectively triple the amount of juice you can get from a single power plant.

Do you have a link for this stuff? I want to rewire my house with it...

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DuSTman Search for posts by this member.
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PostIcon Posted on: May 22 2001,19:12 Skip to the previous post in this topic. Skip to the next post in this topic. Ignore posts   QUOTE
on the thickness thing.. Superconductors only superconduct when the current flowing through them is lower than a certain critical current density (which is affected by the temperatue.. the more below the superconducting temperaure, the higher the critical current density will be).

But in general, they might need quite thick wires, so that they can carry a lot of current and not become resistive, while not making itself impractical by requiring too much cooling equipment..

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damien_s_lucifer Search for posts by this member.
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PostIcon Posted on: May 22 2001,21:18 Skip to the previous post in this topic. Skip to the next post in this topic. Ignore posts   QUOTE
isn't the critical current density a hell of a lot higher than the amount of current you can put through an equivelent-size copper wire though?

I mean, you shoot 100 amps through some 24 gauge copper wire and *poof!*- no more wire.

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DuSTman Search for posts by this member.
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PostIcon Posted on: May 22 2001,21:22 Skip to the previous post in this topic.  Ignore posts   QUOTE
i don't know what the order of the critical current density is..

just raising it as a point..

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