that’s no problem at all, systems like that are in use

It’s easier to freeze water than to cool rock borehole

still 84% to go

Not really, there are also polyesters and polyamides. These used here are hydrocarbons, and turns out there’s a tool for that. You see, in oil refining there’s a lot of stuff manufactured that it’s useless without further processing, as in, after distillation and vacuum distillation you might end up with half of weight of oil or more as asphalt or heavy oils that barely can be sold. So in order to make them useful, these products are broken down into smaller molecules, and then are separated again. What they’re doing is similar to process called hydrocracking that is commonly used to turn heavy vacuum distillates, think something like motor oil or other greases, to diesel

If one were to make hydrogen producing solar farm specifically, this could have made sense if there were efficiency gains compared to pv + electrolyser. But there ain’t, and from what i understand won’t be

Ye i’ve seen that before. Perennial problem with this aporoach is that efficiency is capped below what pv panel can get and also now instead of wiring you need to install purified water + hydrogen plumbing. Also while you just can use only excess of generation for electrolysis, this is always on