From: Christian Weisgerber (naddy@mips.inka.de)
Date: Fri May 17 2002 - 17:48:10 MDT
Damien Broderick <d.broderick@english.unimelb.edu.au> wrote:
> >MBrains will want to be in stealth mode (envelop
> >your star in a shell and dump waste heat into a black hole) and hide from
> >each other.
>
> I was charmed by this black hole idea, which I haven't seen before in quite
> that form.
I don't think it will work.
> Is it terribly bad just to dump the degraded waste heat back on the central
> star?
How do you propose to dump the waste heat back on the central star
in the first place?
> And is it in fact feasible to turn all your heat noise into, say, IR laser
> light and beam it that accurately at black holes?
Ah, the _Sundiver_ cooling. The rec.arts.sf.science archives might
hold some discussion of this. It can't work. Waste heat has high
entropy, laser light has low entropy. You're violating the Second
Law.
> And does the hole just gulp everything down, grow minutely larger, and say
> nothing? Or is there bound to be a radiating accretion disk slamming out
> gamma and X-rays?
An accretion disk is from *matter* falling into the hole.
I don't think there's anything that keeps a black hole from serving
as an entropy sink, per se. However, you can't "beam" waste heat,
so actually dumping it into the sink is a problem.
Surrounding yourself with a shell of black holes sounds a bit
daunting to me.
-- Christian "naddy" Weisgerber naddy@mips.inka.de
This archive was generated by hypermail 2.1.5 : Sat Nov 02 2002 - 09:14:10 MST