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Freezeing your robot!
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timmeh
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Joined: 20 Jul 2004
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if you where to put a normal pc fan on your batts that would be a good idea right it wouldent be too cold to distort the plates?
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Post Tue Sep 21, 2004 6:48 pm 
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Glen
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heh well no a cooling fan doesnt get air that cool (wish it did though).

but ive heard way to many cases of pc fans breaking, the cheap kind, jakes vantec tornado has been fine, until it ingested lets say, foreign objects Very Happy
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Post Tue Sep 21, 2004 6:59 pm 
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timmeh
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Joined: 20 Jul 2004
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Location: Victoria


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I know that the fan dosent make the air cool Very Happy

Thats why i will have it blowing cooler air from the outside of the robot threw the battery packs which will have heat rings so there is spaces for the air to flow threw
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Post Tue Sep 21, 2004 7:17 pm 
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3Faze



Joined: 26 Jun 2004
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Location: Lincolnshire, UK


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quote:
Originally posted by windhammer:
Toaster/Strip heater for plastics ?

i think ill try that. Laughing


It works great.

Post Wed Sep 22, 2004 8:44 am 
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Big AL
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Joined: 16 Oct 2004
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frozen

i was thinking about this today and you on the right track but wrong object it the things that draw power from the batterys that you freeze it slow the electrons down enough to allow a faster transferal rate from object to object.

as for the wires heating up try packing them in ice during the fight or for the extreme liquid nitogen Very Happy .


you could pack the battery in ice but it would have to be outside the fridge so it couldn't freeze just cool it down you be able to get more juice out of it
the way you pack it is by placing the ice around where the wires connect and less around the battery. this will work but you either have to keep the battery in an esky to carry them around in or it will lose it's charge really quickly just sitting there or just find a frigde that runs on a car battery to lug around
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Post Sat Oct 23, 2004 10:38 pm 
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timmeh
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Or just forget about freezing anything cos it screwes up your cells Rolling Eyes
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Post Sat Oct 23, 2004 10:42 pm 
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Valen
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Joined: 07 Jul 2004
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about the only time chilling the robot off would work is if you used high temperature supeconductors, then you only need to cool it down to liquid nitrogen temperatures. (77k -196C) problem is the high temp superconductors dont make very good wires, for that you need to go to standard superconductors (and even then its only "ok") and for that you need liquid helium (4.5k -269C)
then it would start to make a difference.
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Post Sun Oct 24, 2004 12:01 am 
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JohnMuchow



Joined: 25 Aug 2004
Posts: 21
Location: New York City, USA


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quote:
Originally posted by Team Hell Bent!:
Or just forget about freezing anything cos it screwes up your cells Rolling Eyes


Darn good advice. Smile
Freezing the cells doesn't help anything and can easily cause damage. Reduces the performance of the cells too. Hot cells actually perform better (rate of reaction increases as temperature rises), but it's bad for the cells. You get a choice, run cool for max. life or run hot for max. performance (up to a certain point).
Freezing wires doesn't make any visible difference. As Valen pointed out, even if you used liquid nitrogen it wouldn't help as copper isn't a superconductor. The resistance of copper goes down as the temperature goes down, but not by any amount that would make a difference to us. If frozen, the wires would (maybe) run cooler for a bit but if they want to heat up, you're losing power due to the voltage drop along the wires.
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Post Sun Oct 24, 2004 5:33 am 
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