Quote from: philipma1957 on Today at 07:10:11 PM

Quote from: Febo on Today at 06:10:00 PM

Quote from: Last of the V8s on Today at 06:43:28 AM

Quote from: Wexlike on September 14, 2020, 11:40:08 PM

An interesting question just popped in my mind:
How much kWh was used to create the current Blockchain?
Should be somehow possible to calculate it based on the given mining hardware and mining difficulty.

https://twitter.com/blockbain/status/1305539345991036933

a fair few

This is actually what matters. Energy spent and not hash power as so many take as main metric of how secure bitcoin network is. Hash power keep increasing because better and better ASIC miners gets built. But if energy put into securing Bitcoin network stays same that means that no matter how high hash power will go the network is same secure as before. The main problem is what also is said in the tweet. These numbers are just his estimations. It is much easier find a hash power number then to calculate energy spent. Actually even better metric would be money spent to pay electricity spent for mining. Perfect but even harder to get metric.

Yeah except he is too high. he has 96,029,700 mega watts per 2020 year that would be 263,095 mega watts per day or 10,962 megawatts an hour.

my 2020 hourly estimate was about 7100 megawatts on the high side based on 50 watt per th gear.
my 2020 hourly estimate was about 5670 megawatts on the low side. based on 40 watt per th gear.

he used 70-75 watt per th gear and I do not think that is accurate

still whether we use 5,700 mega watts an hour
or 7,100 megawatts an hour ------ my best guess for now

or 10,900 megawatts an hour

it is a lot of energy per hour.

I think you've misunderstood. He said:

'Thats cumulative up until ~ right now. Highest yearly value was 2019 @ 29.33 TWh (half my estimate from last year because its a minimum bound) - this year will end up being more though once finished, 2020 YTD @ 27.59 TWh. Usage appearing to stabilize, maybe eventually drop.'

The 96,029,700 MWh you quote is the total amount of energy since the inception of Bitcoin. His estimate for 2020 so far is 27.59 TWh which translates to 3185 MegaWatts which is actually at the lower bound according to Cambridge estimates - https://www.cbeci.org/