3 ms·
First, the 80% number is a number I pulled out of a hat. Second, why does it have to be constrained to that day? Why not (effectively) bank it in the summer and
by SoftwareMaven 12y ago
First, the 80% number is a number I pulled out of a hat. Second, why does it have to be constrained to that day? Why not (effectively) bank it in the summer and use it in the winter?
- derpasaurus 12y agoThere's the sticky widget. Power storage is a huge problem at this point that we don't have a really good solution to.
- dredmorbius 12y agoWell, we do. It's just that the methods involve a lot of loss. Plants store solar energy as hydrocarbons. Further reformed into coal, oil, and gas, that's what we use today. It's possible to synthesize hydrocarbons from seawater at a net efficiency likely around 50%. Hydrogen electrolysis is the primary energy cost at 60% energy delivered on input. Run that from solar cells at 20% efficiency and you've got a net delivery of 10% of input solar as stored hydrocarbons. Mind that you're only going to extract about 30-40% of that as useful work or energy (electric generation is about 38% efficient in fuel conversion, cars around 10-20%, IC engines generally about 30%). But the neat thing about hydrocarbons is that once you've got them, they can store for a long time. Hell, we've got proofs-of-concept showing 300-500 million year viability. http://redd.it/22k71x http://redd.it/22k71x There are other options as well. Some are far more responsive (flywheel kinetic storage, pumped hydro), some far more efficient in energy input/output), others have varying degrees of suitability (CAES, thermal energy storage, liquid metal/molten salt batteries). I'm actually starting to see this as a potentially solved problem.