_hypx

90 ms·

931.
by _hypx 5y ago
Which is still something like 1200 Wh/kg. Worlds beyond li-ion...
932.
by _hypx 5y ago
I wonder if “all of the above” is too crazy? All of these companies have reached a stage in their corporate life where innovation is expected to stop or at least slow down.
933.
by _hypx 5y ago
A COPV has about 6% hydrogen by mass. At 33.3 kWh/kg, that’s ~2000 Wh/kg. This is far beyond the theoretical limits of li-ion batteries. Platinum is not a critical component, only necessary in current PEM fuel cells. Future fuel c
934.
by _hypx 5y ago
Alongside lithium, the same is true of any plastic materials and most of the electrolytes. Ironically, the rapidly reduction in battery costs is make this problem harder, as there are fewer high-value components worth recycling.
935.
by _hypx 5y ago
Negative prices means they simply refuse to sell electricity, rather choosing to shut down the wind turbines instead. This BTW, also causes retail electricity prices to soar despite the cost of generation being close to zero.
936.
by _hypx 5y ago
The best fuel cells already reach >70% efficiency.
937.
by _hypx 5y ago
Efficiency is quite irrelevant to this subject when the cost of energy is nearly zero. Hydrogen will win out simply because it is cheaper and more sustainable than batteries.
938.
by _hypx 5y ago
It should be noted that the author is John Michael Greer, a person with… interesting viewpoints on science, society and magic (yes, literally magic). Ultimately, any serious analysis of his claims will have to address his absurdly backwar
939.
by _hypx 5y ago
AFAIK, the weight difference between TEU and FEU (forty-foot equivalent unit) isn’t that big. You probably won’t be hauling heavy things in one of these things anyways. Likely only high-value stuff will be hauled on an airship. This is just
940.
by _hypx 5y ago
You know, a hypothetical 400m long dirigible, made out of modern materials, could carry up to 3000 tonnes of cargo: https://erik-engheim.medium.com/calculating-lifting-capacity... That would give it a cargo capacity of arou
941.
by _hypx 5y ago
The whole thing was just fearmongering. Many other countries have seen huge drops in fertility rates without any heavy-handed methods.
942.
by _hypx 5y ago
Compared to the cost of large-scale hydrogen storage batteries will always be expensive. This is why grids will use hydrogen for long-duration energy storage instead of batteries.
943.
by _hypx 5y ago
For most of us here, the 2000s and 2010s were the pinnacle of innovation of our respective fields. Anything that follows would seem like a downturn. Likely, if we want to see innovation it will be in a field that we're less familar wit
944.
by _hypx 5y ago
1) Fuel cells are batteries too. This is no different chemically speaking. 2) It will be cheaper than what it would take to overhaul the grid. The problem is that we must get rid of all fossil fuels while also radically increasing capacity.
945.
by _hypx 5y ago
It is the future of transportation. The main opposition is now EV investors. Their only motivation is protecting their profits.
946.
by _hypx 5y ago
The only plausible solutions are hydrogen combustion or synfuels for now. There are no other ways of making a viable race car right now.