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WRT hydrogen engines: This video explains why using hydrogen to power an internal combustion engine doesn't make sense: https://www.youtube.com/watch?v=vJjKwSF9
by gwbas1c 4y ago
WRT hydrogen engines: This video explains why using hydrogen to power an internal combustion engine doesn't make sense: https://www.youtube.com/watch?v=vJjKwSF9gT8 https://www.youtube.com/watch?v=vJjKwSF9gT8
Lots of more informative responses in this thread than I can explain; just remember that a lot of people are promoting "hydrogen" in situations where it is either economically inferior to traditional batteries, or where the laws of physics make it impractical. (IE, the hydrogen V8 requires tanks so large that the vehicle is impractical.)
In whatever hydrogen space you're getting into, make sure you run the numbers like this video does. (IE, efficiency, volume of compressed hydrogen, energy lost to compressing / refrigerating, ect,) and make sure they make sense. For example, hydrogen might not make sense for day-to-day storage compared to a battery, but it may make perfect sense for a replacement for a standby generator.
- Sohcahtoa82 4y agoAs a great follow-up, Engineering Explained did a video on BMW's hydrogen car that used liquid Hydrogen. https://www.youtube.com/watch?v=AouW9_jyZck https://www.youtube.com/watch?v=AouW9_jyZck TL;DW - Liquid hydrogen is an even worse proposition, despite offering greater density than hydrogen gas.
- gwbas1c 4y agoFollowing up on my comment on a standby generator: There are a lot of places where the generator needs to be able to run for a few days, in poor weather. Think of the Texas blackout, with users like hospitals and data centers. There's got to be a point where a fuel cell with a large tank of hydrogen is cheaper than a bigger battery. And, if you can hook in some kind of electrolysis thing, it could refill itself too.