3 ms·
Oh, so if I change my numbers mother nature do the same? "my numbers" are not mine, but from the current state of research on the field. The current state is s
by kkfx 4y ago
Oh, so if I change my numbers mother nature do the same?
"my numbers" are not mine, but from the current state of research on the field. The current state is simple: we can produce green hydrogen but in too little quantities, that means:
- we can't use it on scale
- there is no point in using it at smaller scale
That's why kWh count, because panels are not "toll free" coming like fruits on some tree branches, they have to be produced and they have a cost. They have a usable life, they need to be decommissioned after that. Actually we can make a single family home hydrogen+p.v. in certain area of the world, such home will cost few MILLIONS, need a variable amount of land from an hectare to few hectares, and last at around 10 years without special maintenance. We can produce few of them for the 1% of the humanity. Unfortunately such humanity can't keep up the species nor can't produce the aforementioned tech in their backyard, that's is. Is it more clear now?
We can do many things in general, some can scale, some can't, some are reasonable some are not. A green hydrogen industry so far is not reasonable and can't work on scale. We can continue researching on it of course, but we need working things, not dream, so we need something else to keep up.
- ncmncm 4y agoYour numbers are still crazy and wholly disconnected from reality. Panels do not, in fact require "decommissioning". They last much longer than 10 years: warranties are 20 years, often more. Output may be degraded by up to 20% after that, but they continue producing. If cooled, they last longer. You can buy an electrolyser off the shelf today and plug it into any outlet. Efficiency is at least 60%, and rising; recent advances, which will hit market soon, have pushed it over 95%. A hydrogen car is much, much lighter than a battery electric car, so requires less energy to operate, but typical conversion losses today are larger than the difference. Nobody needs a hectare of panels for personal transportation use, whether for charging a battery electric car or synthesizing hydrogen for a hydrogen-electric car. A typical rooftop is plenty, at least in summer, depending on latitude. A private system sufficient to produce hydrogen for a car is in low tens of $thousands, not $millions. None of the above has anything to do with "scalability", which is a utility concern. Utilities can make hydrogen at whatever rate they have bought electrolysers for. The only thing stopping utilities is that if they had money for electrolysers, it would be far better used to buy more panels. Making shit up gives you bad numbers and false conclusions.