3 ms·

Even if you double the estimate, it's significantly less than the BS numbers being tossed around. By a lot.

arcticfox 9y ago
Which of these assumptions leads you to be different than them by 4-5 orders of magnitude? Their numbers are only 3x higher total hashrate estimate and 3x less efficient GH/s over the cutting edge Antminer, which seems reasonable. I'm confused where you diverge so much. https://digiconomist.net/bitcoin-energy-consumption#assumptions https://digiconomist.net/bitcoin-energy-consumption#assumpti...
tedivm 9y ago
Okay, here's the real issue with your comment. You have your units all wrong. You're measuring "watt seconds" instead of "watt hours". Lets fix our units here - (12000000 (TH per second s) / 14 (TH per second)) * 1372W = 1,176,000,000W/s Now we need to convert seconds to hours (60 * 60)- 1,176,000,000W/s * 60 * 60 = 4,233,600,000,000W/h That is roughly 4.23 terawatt hours. Take into account cooling and the fact that not everyone is using the same efficient miner from your example and the numbers look pretty damn accurate to me.
- brndnmtthws 9y ago
  Watts is an instantaneous measurement, so I don't think that's right. If a lightbulb uses 100W and it's running for 1h, it consumes 100Wh of energy.
  - tedivm 9y ago
    Exactly my point. When you take a 100w bulb and run it for an hour you get 100Wh of energy. If you run a 100W bulb for 1 second then you have 100W/s of energy used. During your calculations above you use the "terra hashes per second" number- as you said, "14TH/s at 1372W". The device runs at 1372W, and it also calculates hashes at 14TH/s. You can use the same formula you did to calculate the 10Wh for the lightbulb- if you leave the device running for 1h it will consume 1372W/h of electricity (or 1372 Watts * 1 hour). If you want to convert the W/h unit to W/d you can multiple the "hour" unit by "24" (since there are 24 hours in a day). To convert in the other direction you do the opposite (divide the day by the number of hours in it). Converting from Wh to Watt seconds is similar. You're not the first person to be confused by this, and wikipedia has a whole section devoted to explaining it[1]. [1] https://en.wikipedia.org/wiki/Watt#Difference_between_watts.2C_watt-hours_and_watts_per_hour https://en.wikipedia.org/wiki/Watt#Difference_between_watts....
    - brndnmtthws 9y ago
      I just noticed the article now says "terawatt-hours per year", which is more realistic. I can't tell if they amended it, or if I misread.
- Faaak 9y ago
  W/s doesn't make any sense. Its Ws or Wh instead

Which of these assumptions leads you to be different than them by 4-5 orders of magnitude? Their numbers are only 3x higher total hashrate estimate and 3x less efficient GH/s over the cutting edge Antminer, which seems reasonable. I'm confused where you diverge so much. https://digiconomist.net/bitcoin-energy-consumption#assumptions https://digiconomist.net/bitcoin-energy-consumption#assumpti...

tedivm 9y ago

Okay, here's the real issue with your comment. You have your units all wrong. You're measuring "watt seconds" instead of "watt hours". Lets fix our units here - (12000000 (TH per second s) / 14 (TH per second)) * 1372W = 1,176,000,000W/s Now we need to convert seconds to hours (60 * 60)- 1,176,000,000W/s * 60 * 60 = 4,233,600,000,000W/h That is roughly 4.23 terawatt hours. Take into account cooling and the fact that not everyone is using the same efficient miner from your example and the numbers look pretty damn accurate to me.

brndnmtthws 9y ago
Watts is an instantaneous measurement, so I don't think that's right. If a lightbulb uses 100W and it's running for 1h, it consumes 100Wh of energy.
- tedivm 9y ago
  Exactly my point. When you take a 100w bulb and run it for an hour you get 100Wh of energy. If you run a 100W bulb for 1 second then you have 100W/s of energy used. During your calculations above you use the "terra hashes per second" number- as you said, "14TH/s at 1372W". The device runs at 1372W, and it also calculates hashes at 14TH/s. You can use the same formula you did to calculate the 10Wh for the lightbulb- if you leave the device running for 1h it will consume 1372W/h of electricity (or 1372 Watts * 1 hour). If you want to convert the W/h unit to W/d you can multiple the "hour" unit by "24" (since there are 24 hours in a day). To convert in the other direction you do the opposite (divide the day by the number of hours in it). Converting from Wh to Watt seconds is similar. You're not the first person to be confused by this, and wikipedia has a whole section devoted to explaining it[1]. [1] https://en.wikipedia.org/wiki/Watt#Difference_between_watts.2C_watt-hours_and_watts_per_hour https://en.wikipedia.org/wiki/Watt#Difference_between_watts....
  - brndnmtthws 9y ago
    I just noticed the article now says "terawatt-hours per year", which is more realistic. I can't tell if they amended it, or if I misread.
Faaak 9y ago
W/s doesn't make any sense. Its Ws or Wh instead