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Brian Gaff
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 Posted: Sat Nov 22, 2008 8:27 pm Post subject: Urine processor problems |
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Thinking about how this centrifuge works, seems to me that what may have
happened is that in the motor casing some debris has accumulated on the
ground for some reason, Gravity will of course make this be at the bottom
out of the way, but in micro gravity, it would be very easy with the air
inside stirred up for this to get into the works of the motor and probably
make itself very unpopular by increasing current if it got between the
armature and the magnet assembly.
Brian
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Brian Gaff - briang1@blueyonder.co.uk
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please! |
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Sir Frederick
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| Posted: Mon Nov 24, 2008 8:35 am Post subject: Re: Urine processor problems |
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On Sat, 22 Nov 2008 14:27:28 GMT, "Brian Gaff" <briang1@blueyonder.co.uk> wrote:
[quote]Thinking about how this centrifuge works, seems to me that what may have
happened is that in the motor casing some debris has accumulated on the
ground for some reason, Gravity will of course make this be at the bottom
out of the way, but in micro gravity, it would be very easy with the air
inside stirred up for this to get into the works of the motor and probably
make itself very unpopular by increasing current if it got between the
armature and the magnet assembly.
Brian
It could also be a lack of convection cooling in low effective gravity.[/quote]
What heat is produced, in any way, stays there, and continuously
raises the temperature. Conduction is less efficient.
To not consider this, is criminal. |
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Brian Gaff
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| Posted: Mon Nov 24, 2008 3:21 pm Post subject: Re: Urine processor problems |
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I>d not have thought that heat was a factor if its designed correctly. I
mean surely its got to have some kind of forced cooling as you say, one
would take this as read. Though the current of 1.4 amps is borderline on
heat generation I suppose.
I am glad they have not tried to design a spin dryer for space, thats all!
Brian
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Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can>t hear them
Email: briang1@blueyonder.co.uk
______________________________________________________________________________________________________________
"Sir Frederick" <mmcneill@fuzzysys.com> wrote in message
news:gjdki4t0p24p702u8llo4t0jd4a7smt9n7@4ax.com...
[quote]On Sat, 22 Nov 2008 14:27:28 GMT, "Brian Gaff" <briang1@blueyonder.co.uk
wrote:
Thinking about how this centrifuge works, seems to me that what may have
happened is that in the motor casing some debris has accumulated on the
ground for some reason, Gravity will of course make this be at the bottom
out of the way, but in micro gravity, it would be very easy with the air
inside stirred up for this to get into the works of the motor and
probably
make itself very unpopular by increasing current if it got between the
armature and the magnet assembly.
Brian
It could also be a lack of convection cooling in low effective gravity.
What heat is produced, in any way, stays there, and continuously
raises the temperature. Conduction is less efficient.
To not consider this, is criminal.[/quote] |
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