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Comment by jhworksapp | Hacker News Reader

No more bitcoin cryptocurrency and will solve this issue. it has been wasting electric energy.

The latest tech is using Bitcoin mining to heat water. If you're going to use resistive heating anyway I don't hate it, even though I'm a big crypto currency skeptic.

https://heatbit.com/

It’s easy to justify on paper and websites. I doubt it actually works out that way in practice.

What about instead a talk about datacenters energy usage?

Or no more hot drinks. Ban kettles.

Global population approximately: 8.44E+09, Energy to heat 1 liter of water in electric kettle: 80 watt hours, 1 Watt hour ~ 2.78E-15 exajoules. Global energy consumption approximately: 600 exajoules.

8.44E+980 watt hours(2.78E-15 exajoules/watthours)= 1.88E-03 exajoules 1.88E-03/600 = 3.12E-6 or .000312% of the global energy use.

In simple words. Banning kettles would do nothing to cut global energy use.

Isn't that only the energy of 1 liter per person per year? I think most people heat more water than that.

(Also I think bitcoin energy usage is also on the order of 0.001% of global energy use.)

A quick search says 200 TWh for bitcoin mining per year, out of a total of 31 000 TWh of electricity generation, that is, 0.6%, or 600 times more than what you thought.

The Comment above used energy consumption of 600 exajoule.

200 twh = 0.72 exajoule

0.72/600 = 0.0012

Which is off by 100 because I forgot to multiply by 100 for percent, so 0.1%.

But if we are in twh we can get the tea numbers as well: ~300 billion liters per year, with ~100Wh/litre that would be ~30TWh.

So 30 vs 200 is about as close as I expected.

But this is all just for fun.

Thanks, you're right, I'm off by x365. But still it's a very insignificant value.

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