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Satellites reveal heat leaking from largest US cryptocurrency mining center

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Re: Satellites reveal heat leaking from largest US cryptocurrency mining center

#131
post #2

"leaking" is the wrong word here - it implies some sort of inefficiency, process which is not working as well as it needs to. Leaky bucket, leaky faucet... That's not the case here, that center is __dumping__ heat into environment - it is by design, all that electricity is being converted into the heat. By design, it's enormous electric heater.

> By design, it's enormous electric heater. You're right, it's not leaking, it's dumping excess heat on purpose. However, I get triggered whenever someone uses the term "by design" wrongly. The generation of heat is not by design. It's an undesired side-effect of the computing being done. "By design" would mean that someone decided that there should be a certain amount of heat generation and made sure that it happens…

When you compute some nice and elegant result, dissipated heat is an undesired side effect. But let's face it: we are speaking about proof of work. Proof of work means that a computed has run during some "required" time. In other words, you have to prove that enough heat has been dissipated. Waste of energy actually is "by design" here.

Re: Satellites reveal heat leaking from largest US cryptocurrency mining center

#132
post #37
post #17

Earlier quoted context omitted.

Technically it is inefficiency. The electricity should be doing computer things. Heat is wasted electricity. Just there's not much the data centre could do about it.

Even if the computer does perfectly-efficient computer things with every Joule, every single one of those Joules ends up as one Joule of waste heat. If you pull 100W of power out of an electric socket, you are heating your environment at 100W of power completely independent of what you use that electricity for.

Theoretically, if your computation is energy efficient, you won't need any electricity at all since the real computation costs zero energy.

Re: Satellites reveal heat leaking from largest US cryptocurrency mining center

#133

I always wondered if anybody has calculated how much of our global heating could be attributed, if any at all, to every electronic device, server, and engine outputting heat as a byproduct.

Negligible, almost invisible. Now the emissions (CO2) coming from the gas/oil/coal energy generation so you can run your device in the first place, that's very high.

Re: Satellites reveal heat leaking from largest US cryptocurrency mining center

#134
post #100

Earlier quoted context omitted.

> every single one of those Joules ends up as one Joule of waste heat. Yes it ends up as heat, but with some forethought, it could be used to eg heat people's homes rather than as waste.

You can say that about any waste heat. In really, it’s not convenient to move all waste heat to where it’s more needed.

Modern industrial scale insulated hot water district heating systems can do dozens of kilometers with the water cooling down only by a degree Celsius.

Re: Satellites reveal heat leaking from largest US cryptocurrency mining center

#135
post #100

Earlier quoted context omitted.

> every single one of those Joules ends up as one Joule of waste heat. Yes it ends up as heat, but with some forethought, it could be used to eg heat people's homes rather than as waste.

These days it's not rare to have data center heated buildings. I guess crypto bros are just not thinking about this. But technically if could be done there too.

There was a startup in EU which explicitly sold heat from crypto mining to the local energy provider. IIRC it was also here on hacker news some time ago.

Re: Satellites reveal heat leaking from largest US cryptocurrency mining center

#136

Earlier quoted context omitted.

These days it's not rare to have data center heated buildings. I guess crypto bros are just not thinking about this. But technically if could be done there too.

There was a startup in EU which explicitly sold heat from crypto mining to the local energy provider. IIRC it was also here on hacker news some time ago.

Qarnot maybe

Re: Satellites reveal heat leaking from largest US cryptocurrency mining center

#137

Earlier quoted context omitted.

> By design, it's enormous electric heater. You're right, it's not leaking, it's dumping excess heat on purpose. However, I get triggered whenever someone uses the term "by design" wrongly. The generation of heat is not by design. It's an undesired side-effect of the computing being done. "By design" would mean that someone decided that there should be a certain amount of heat generation and made sure that it happens…

When you compute some nice and elegant result, dissipated heat is an undesired side effect. But let's face it: we are speaking about proof of work. Proof of work means that a computed has run during some "required" time. In other words, you have to prove that enough heat has been dissipated. Waste of energy actually is "by design" here.

I'm not sure if you're trolling. Of course that's nonsense. The work is entirely the (artificially complex) computations necessary to get to the result. If someone were to invent a 100% efficient computer, based on superconductors, which produces no heat at all, the proof of work (the final hash value) would still be equally valid. As I said, heat is an undesired, unavoidable side-effect. You don't show anybody the heat you produced, to convince them that you did the work, you show them the hash value, otherwise you could just burn some wood.

Re: Satellites reveal heat leaking from largest US cryptocurrency mining center

#139
post #104
post #95

Earlier quoted context omitted.

Only true for our current computers and not true with reversible computing. With reversible computing you can use electricity to perform a calculation and then "push" that electricity back into a battery or a capacitor instead of dumping it to the environment. It's still a huge challenge, but there is a recent promising attempt: "British reversible computing startup Vaire has demonstrated an adiabatic reversible comp…

Actually pretty cool - I was about to comment “nice perpetual motion machine” but looked into a bit more and it’s much more interesting than that (well, a real perpetual motion machine would be interesting but…) Thanks for posting. Pretty cool.

This kind of stuff could trigger the next revolution in computing, as the theoretical energy consumption of computing is pretty insignificant. Imagine if we could make computers with near-zero energy dissipation! A "solid 3D" computer would then become possible, and Moore's law may keep going until we exhaust the new dimension ;)

Re: Satellites reveal heat leaking from largest US cryptocurrency mining center

#140
post #56
post #24

Earlier quoted context omitted.

It'd be super fun to take that as an axiom of physics then to see how far upwards one could build from that. Above my skills by far.

it's called the first law of thermodynamics

The first law involves cwork. The axiom I am thinking of involves information.
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