undefined | Better HN

0 pointshenearkr6y ago0 comments

However if it is a primordial blackhole it is probably not much rotating... thus no much energy to get by the Penrose process.

I thought that just by letting masses getting sucked in while pulling ropes tied to alternators we could generate electricity... is it too naive? The amount of energy given by the fall into the blackhole would be superior than that used to bring the masses there in the first place.

0 comments

dvdkhlng6y ago

I don't think that this would work: whoever is holding the alternator would also be pulled into the black hole while generating the electricity.

Maybe the "right" way to convert potential energy is via conversion to heat and black-body radiation in the accretion disk? Might be difficult to capture significant percentage of that energy, though. See also [1]

[1] https://arxiv.org/pdf/astro-ph/0307333v1.pdf

henearkrOP6y ago

I would have started by an orbiting station (or even an orbiting ring-shaped station), staying at a safe distance from the horizon, from which the masses would be droped.

Is it still too unrealistic?

For the radiation energy, it sure makes sense! Moreover isn't it any hard radiations emitted when the hadrons' quarks are torn from each other on reaching the events horizon?

petschge6y ago

If your station is in orbit, then so is the mass you want to drop into the black hole. Orbital mechanics works quite differently to what you are used to from the surface of a planet.

1 more reply

j / k navigate · click thread line to collapse