Bitcoin Miners Stress Power Grids ⇥ seattletimes.com
Paul Roberts, Seattle Times:
In a normal year, demand for electric power in Chelan County grows by perhaps 4 megawatts — enough for around 2,250 homes — as new residents arrive and as businesses start or expand. But since January 2017, as Bitcoin enthusiasts bid up the price of the currency, eager miners have requested a staggering 210 megawatts for mines they want to build in Chelan County. That’s nearly as much as the county and its 73,000 residents were already using. And because it is a public utility, the PUD staff is obligated to consider every request.
The scale of some new requests is mind-boggling. Until recently, the largest mines in Chelan County used five megawatts or less. In the past six months, by contrast, miners have requested loads of 50 megawatts and, in several cases, 100 megawatts. By comparison, a fruit warehouse uses around 2.5 megawatts.
Bitcoin’s burgeoning electricity demands have attracted almost as much attention as the cryptocurrency’s wildly fluctuating value. But estimating exactly how much electricity the Bitcoin network uses, necessary for understanding its impact and implementing policy, remains a challenge. In the first rigorously peer-reviewed article quantifying Bitcoin’s energy requirements, a Commentary appearing May 16 in the journal Joule, financial economist and blockchain specialist Alex de Vries uses a new methodology to pinpoint where Bitcoin’s electric energy consumption is headed and how soon it might get there.
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His estimates, based in economics, put the minimum current usage of the Bitcoin network at 2.55 gigawatts, which means it uses almost as much electricity as Ireland. A single transaction uses as much electricity as an average household in the Netherlands uses in a month. By the end of this year, he predicts the network could be using as much as 7.7 gigawatts — as much as Austria and half of a percent of the world’s total consumption. “To me, half a percent is already quite shocking. It’s an extreme difference compared to the regular financial system, and this increasing electricity demand is definitely not going to help us reach our climate goals,” he says. If the price of Bitcoin continues to increase the way some experts have predicted, de Vries believes the network could someday consume 5% of the world’s electricity. “That would be quite bad.”
It takes days to complete a single transaction, and sucks up a huge amount of power in the process. This industry is asinine.