1. No, For true cooling costs it will be around 50% and that is for CRAC units that are specifically designed to maintain temperature and humidity for data centers. Sure you can set up some fans and try to cool with ambient temperature but I don't think this is sustainable for long term growth of the mine. (This of course depends on if you live in Iceland or Canada)
There's no reason to use mechanical cooling for something that can be throttled by error rate and be radically cheaper to cool with ambient air exchange. Just filter the incoming air.
4.
https://www.eia.gov/electricity/monthly/epm_table_grapher.cfm?t=epmt_5_6_a Idaho, as of Feb 2017, is literally one of the cheapest states in the entire country in regards to commercial electricity rates. I simply was talking generally about a state but yes if there is a hydroelectric dam then the rates could be around .03-.05 per kwh. The thing I found funny and surprising was Virginia is very cheap for commercial electricity rates.
State level granularity doesn't cover the nuance needed. Idaho, as a state, has cheap power.
Several counties in central Washington have the cheapest power in the nation. Washington State, as a whole, has expensive power over in the Seattle metro area.
And if you're serious about a mining business, you already know what those counties are.
