During some discussions at our local meetup group last night (
http://www.meetup.com/Bitcoin-Tallahassee/), I realized that there is a use case for cryptocurrency mining as a load-balancing mechanism for renewable power utilities, in effect, using mined coins as a form of "stored energy."
The argument goes like this: Suppose you have an installation of renewable power generation (solar, wind) whose production varies throughout the day, and is not necessarily well-matched to demand.
Currently, either the surplus energy needs to be stored (using expensive battery systems) or exported via inefficient long-distance transmission lines to other markets.
As an alternative: Renewable power utilities could use their excess power (when available) to drive mining hardware, and collect the (approximate) value of the energy consumed in the process as cryptocurrency.
Then, later, when production is lower (at night, or on a cloudy/calm day), and falls below power demand, the saved coins can be used to buy back surplus energy from nearby partners on the grid, or alternatively, to pay for or offset the cost of fuel (coal/oil/gas/biofuels) to produce it locally.
By proposing this scenario to energy companies and co-ops, one could sell them on the idea of purchasing cryptocurrency mining hardware and doing mining and trading as a more economical means of load balancing, which will help make the adoption of renewables more profitable. And, as the utilities accumulate cryptocurrency reserves, they will pressure more and more of their fuel suppliers to accept it as payment directly, thereby driving broader adoption of cryptocurrencies within the energy industry. As renewables become more competitive, and more and more utilities try this approach, it could drive a fairly rapid shift from the "petrodollar" to bitcoin, or whatever.
Load balancing is already a pretty major issue even within traditional fossil-fuel-driven power markets, and with renewables being added to the mix, the problem will only get worse... So this presents a big growth opportunity for cryptos.
I have contacts at our university's campus utility as well as with a regional co-op, and I'm planning to talk with them about this idea and see if I can get it adopted locally.
Cheers, -Mike