Comments by "Simon" (@Simon-dm8zv) on "Donut" channel.

  1. You are so misinformed. The ONLY reason hydrogen is so expensive is because it is so HORRIBLY inefficient. This will never change.
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  2. ‘I think’ 😂
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  3.  @bcallahan3806  There is a lot of work being done to battery recycling already. This is an interesting watch: https://youtu.be/xLr0GStrnwQ Also: hydrogen cars will also cause waste: lithium batteries, fuel tanks, fuel cells.
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  4. Not relevant because guess what, for hydrogen production you need EXACTLY THE SAME electricity.
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  5. Yup. Simple physics.
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  6.  @BlakeB415  I was talking about Teslas indeed. Like I said, a 15 minute charge is nothing on a long trip. You would normally probably take a longer break anyway. And again: in daily life you actually save lots of time opposed to refueling because charging happens when you sleep. Please provide a source for the diesel generator story, never heard of that before. Driving electric is always the cleanest option, even on carbon heavy electricity. Hydrogen rarely comes near that level because it is so damn inefficient. 90%+ recycling of lithium batteries is absolutely no problem. Look up Redwood Materials and American Manganese.
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  7. Easily compensated for when you start driving.
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  8. Charging an EV takes only 20 minutes at a fast charger. Hydrogen fuel cells are made of finite resources and fuel cells in general have a short life (shorter than a battery).
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  9.  @mazirius11  We could indeed use hydrogen for surplus storage (if there is anything left anyway), but that does not mean we should put it in cars. It is more efficient to store and convert the hydrogen at centralized plants and then distribute the electricity over the grid when needed for anything we like.
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  10. ​ @mazirius11  The majority of charging moments are low power (for example overnight AC charging). Most EV drivers only use fast DC chargers occasionally and need about 10 kWh per day for normal commuting. These are rather low numbers and do not really form a thread to the grid in general. High power DC chargers do indeed require a more heavy duty grid connection, but this is manageable because they are not located all over the place.
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  11. lol where did you get these idiotic numbers and information
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  12. Very inefficient.
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  13. If there is an exceptional amount of wind, you just crank up charging speeds of EV chargers. Much easier and already exists.
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  14.  @TheDirtyBirchTrails  Ah alright. So that has nothing to do with on-board hydrogen production. Anyway, the point with hydrogen combustion in engines is that it is even more inefficient than conversion in a fuel cell..
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  15. Hydrogen cars have batteries.
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  16. You would need insane numbers of solar panels to produce enough hydrogen.
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  17. You would need a big battery for that xD
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  18. Hydrogen cars require batteries as well + a fuel cell and a fuel tank. Current EV batteries outlast the rest of the vehicle. Hydrogen high pressure components are designed for 10 years but the fuel cell itself will be worn out way before that - as well as the batteries that have to cycle much more than EV batteries.
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  19.  @devinbender8428  Exactly.
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  20. Guess what, the electricity comes from exactly the same source as where the hydrogen factory gets it...
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  21. Just use a fast charger.
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  22. The point is EVs require much less of that energy.
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  23. Overproduction of renewables in the summer could indeed be stored in the form of hydrogen. But then it would still be very inefficient to use it in vehicles. Better just convert it back to electricity and charge EVs with it.
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  24. Natural gas produces about the same amount of CO2 as diesel or gasoline...
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  25. But hydrogen cars will never get anywhere close to the efficiency of an EV. That is the real problem.
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  26.  @abansalify  For hydrogen cars you need lithium, cobalt, nickel, copper and platinum. And in order to create enough renewable energy for hydrogen production you need to build and maintain 3 times as many solar panels and windturbines compared to EVs. It’s a misconception that hydrogen cars solve the material problem.
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  27. Too inefficient
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  28.  @roninviking  Regarding combustion in the engine: comparable. Regarding well to wheel efficiency: hard to say. LPG comes from a fossil source, hydrogen is (ideally) made from electricity.
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  29.  @technologyrethinked  True, but the efficiency is key to reduce CO2-emissions. A combustion engine on hydrogen would consume at least 5 times more electricity per kilometer than an EV.
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  30. He did not mention production of the batteries, fuel tanks and fuel cell for the hydrogen car either.
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  31.  @jameshunter4386  So why not simply drive an electric motor with that energy from the battery?
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  32.  @michaelfrehner4858  No they don't do that. Battery packs are made to size. That WDR video is full of lies and based on wrong data. Auke Hoekstra (University of Eindhoven) explains why it is wrong in this Twitter thread: https://twitter.com/AukeHoekstra/status/1349705031235284993?s=20
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  33.  @210SAi  Thermodynamics.
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  34. Wrong. Those losses account for both hydrogen and electric vehicles so they do not have to be included.
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  35.  @rexli1887  Please elaborate.
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  36.  @rexli1887  But all the losses after the energy generation stage are incredibly high for hydrogen vehicles.
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  37. It changes literally nothing, apart from the energy that comes from the solar panel - but that will be completely negligible.
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  38. They have been around for decades. Still very inefficient. Batteries are far better and this will always remain so. It's just simple physics.
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  39. Sure, hydrogen may play a role in energy storage. However, that doesn't mean we should put it in cars.
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  40. "You have not factored in the real cost of creating the electricity for EV's." - Not relevant. They both start with the same electricity. "You have not factored in the cost and environmental aspects of the batteries." - Not relevant. He didn't factor in the cost and environmental aspects of the batteries, fuel tanks and fuel cell that go in a hydrogen car either. "Hydrogen costs will plummet drastically once the infrastructure is in place and the numbers grow." - Wrong. Hydrogen will remain VERY inefficient and therefore expensive, no matter the scale.
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  41. Why would it be?
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  42. Doesn't change much. Still waaay better.
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  43. Not really. There will always be an average number of EVs charging at any given moment of the day. Therefore there will be barely any renewable surplus.
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  44. Not really. You are referring to the Hyundai Nexo. Hyundai says it CLEANS the air by filtering small particles (fine dust) from the air that is sucked through the grill of the car. That has nothing to do with CO2 removal, let alone this could be called ‘negative emissions’ because the CO2 caused by hydrogen production is incredibly high.
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  45.  @dariushober1506  I would love it to work, but it is just simple physics. Of course the vehicle can function during a demonstration, but only as long as the batteries that power the fuel cells are not depleted. That’s all.
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  46.  @dariushober1506  It’s impossible. You cannot create more energy than you started with. The energy that the hydrogen generates by combusting inside the engine can NEVER be more than the electric energy that was used to make it in the first place. Basic thermodynamics.
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  47. It’s not biased because both hydrogen and EVs start with the same electricity. It’s not relevant what happens before that step.
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  48. Well explained Casper.
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  49. Those conversion losses are NOTHING compared to all the steps that hydrogen has to go through.
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  50. Exactly.
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