Percy Picacity wrote in
:

Never mind what I wrote just now. Can't beat entropy.

No, but you *can* use a heat pump to move it somewhere else.


Yes, sort of what I was getting at, I'm just not sure what qualifies as
'worth it' For example, you could store some low grade heat converting to
electric charge in batteries. This could then power a hot high current heater
to radiate overcoming local ambient heat from solar energy in a space
installation. If you had enough shade that would be likely less useful, it
might be cheaper to set up large low-grade radiators instead. it seems to me
that all kinds of compromises with cost, size, ambient conditions, will rule
what actually gets done.

Given that laser diodes can radiate a lot of power now, and be small with
very low mass, and convert upwards of 30% electrical input to light, they
might become part of a compact space-based heatsink. I suspect that 30% will
not be nearly enough to be usful in most cases because there will be other,
greater losses (laser diodes are some of the most efficient transducers ever
made).