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Joined 1 year ago
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Cake day: July 2nd, 2023

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  • You’re definitely not wrong. Gray hydrogen currently is the most common source, which is a byproduct or an intended product of petroleum cracking. This also is probably a reason why most petroleum companies chose to research hydrogen in the 2000s/2010s rather than battery or other renewable technologies, since it fits nicely in their existing pipelines.

    For storage, I’m pretty sure you can keep it at atmospheric pressure and temperature if space isn’t an issue, but to actually fit it in a vehicle you’d probably have to use one of the techniques you mentioned.

    The Mirai’s issues seem to be that it was just a foothold for consumer hydrogen without anything really backing it. You could almost say the same about EVs/PHEVs 15 years ago and look at them now.

    Honestly though, if we are able to scale up sodium batteries, grid storage and train usage might be moot. Ships could probably still use it as an alternative to diesel though.



  • Your hydrogen efficiency estimates are probably pretty close to what this bike can do. The lithium ion comparison is missing some losses, ~90% efficiency from voltage boost converter. Also, the hub motor/speed controller both add another 75% efficiency to the equation but this applies to both so we can negate it.

    As for being a hydrogen hater, what did hydrogen ever do to you? I think we’d all prefer a solid state solution that would minimize losses but we don’t have enough battery infrastructure to accommodate all of our needs. Sure, hydrogen is not the panacea for fossil fuels or lithium batteries in cars but there are good uses for it. I think Hydrogen can potentially be a good replacement fuel for large shipping vessels like ships and trains, since size requirements aren’t as much of a factor, or used in grid storage as a long term or spillover storage for renewable energy when battery infrastructure is at full utilization and other means aren’t available.












  • It sounds like the issue you’re running into is 2 parts:

    1. Using a dedicated device for Internet connectivity.
    2. Broadcasting wifi evenly throughout the house.

    I think the best implementation that stays within your constraints would be to purchase a hotspot with Ethernet capabilities (like MiFi or Cradlepoint) and place it where you can best get reception. Then buy a couple meshing access points like Ubiquiti APs and place them throughout the house. Run an Ethernet cable from the hotspot to one AP and then mesh the rest. If you can run Ethernet cable to each access point using a network switch, that’s even better.