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Originally Posted by para transit fellow
Does anyone have an estimate of the energy require to liquefy hydrogen?
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the theoretical minimum would in the 3-4 kWh/kg range if memory serves and the best out there now is 6 or so kwh/kg. That's still only 10-20% of the total energy content, but then it takles a lot of energy to keep it there and you hace a lot of loss of hydrogen at every tansfer point and simply through storage as it boils off. The losses added up are huge
Quote:
Originally Posted by EldrickOnIce
Interesting story on new venture by FuelCell Energy and Toyota Motor North America on Launch of "Tri-gen" production system at the Port of Long Beach. Tri-gen uses biogas to produce renewable electricity, renewable hydrogen, and usable water.
Pretty interesting actually
https://finance.yahoo.com/news/fuelc...113000504.html |
Quote:
Originally Posted by Fuzz
Interesting. I wonder what the source is for the biogas and the deficiency of the process?
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This process isn't all that new (see this from 2016:
https://www.energy.gov/eere/fuelcell...ation-fountain). Essentially, they buy natural gas made from organic matter in an anaerobic digester (about 2-4x cost of regular natural gas). Then, feed that biogas through a specialized fuel cell that ends up making electricty, hydrogen, heat, and a small amount of water. The thing is, there's very little biogas available today and using it to make hydrogen (in a very expensive way), ship it all over the place just to turn it back into electricity inside the vehicle is both very inefficient and a poor use for something really needed elsewhere. This is another project to try to kickstart a FCEV market by supplying fuel when most other fueling stations have closed. Toyota is desperate for FCEV to happen as they've spent so much money on it.