I drew a chart juxtaposing the Bitcoin hash rate with the market availability of mining ASICs and their energy efficiency. This allows calculating with certainty the lower and upper bounds for the global electricity consumption of miners.
I decided to do this research after seeing that so many other analyses were flawed. See for example the flagrant errors in Digiconomist’s Bitcoin Energy Consumption Index. I believe that my market-based and technical approach is superior and more accurate.
I split the timeline in 10 phases representing the releases and discontinuances of mining ASICs. See the references and a commentary on the data behind the chart.