Comment Re:Energy Conservation (Score 1) 710
Nuclear and solar are useful. However, you can't control them with the speed required to keep the net stable.
Natural gas ramps up in minutes.
Solar is unpredictable. You can't ramp it up.
Nuclear is slow. A controlled shutdown takes days.
If we want to fully switch to those resources we need large scale electricity storage. For example 20% of daily use in storage. The US used 4,095 x 10e9 kWh in 2012 according to wikipedia. That's on average 11.2 x 10e9 kwh a day. Assuming that my 20% figure is sufficient, that would mean that 2.24 x 10e9 kwh of storage is required.
If we use Li-Po batteries with 265 Wh/kg that is approximately 8.5 million tons of Li-Po batteries.
Ergo, currently such energy storage is unfeasible.
I agree with you on the coal. I don't know any reason why we should continue using that, apart from price. It is not as slow as nuclear but not fast enough to fix fluctuations in electricity usage. Not by a long shot.