3 ms·
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.
by 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 agoExactly 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 agoI 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.