Jump to content

Aristides

Senior Member
  • Posts

    12,701
  • Joined

  • Last visited

  • Days Won

    46

Everything posted by Aristides

  1. I know that you twit and EV's are heavier than their ICE counterparts because of the weight of their batteries.
  2. I'm talking about actual curb weights. Look them up for yourself. The battery in a Tesla Model S weighs as much as the Cummins turbo diesel and transmission in a Ram 3500.
  3. I didn't say they are no good, I said you need a 1200 lb Li battery for an EV to carry as much usable energy as an ICE carrying 70 lbs of gas. Physics is a bitch. Lets compare curb weight. EV's are friggin heavy. A Ford Lightning extended range is oner 1000 lbs heavier than the heaviest F-150 ICE.
  4. Yes but a Tesla needs a 1200 battery to go as far as a car getting 30 mpg can go on 70 lbs of gas. They may be really fast on a single lap of the Nordschleife but don't ask them to do two laps. When I was last in Rome looking at the thousands of cars parked on the street in residential areas, I was asking myself where would they all recharge if they were EV's.
  5. Of course you can but it won't contain much energy. I had a friend who converted a pickup to compressed natural gas. It had two large tanks in the bed just behind the cab. He eventually converted it back to gasoline because he barely had 100 miles range on CNG. I'm not anti hydrogen or EV or other new technologies, I look forward to them but we are kidding ourselves if we don't recognize the challenges involved in making them work. The unfortunate fact is, when it comes to energy density and ease of use, nothing matches fossil fuels, that is why they have dominated as vehicle fuels and still do, not some oil company conspiracies. I'm just saying don't get your hopes too high because it is going to be a long haul getting ourselves off fossil fuels and for some applications, we never will, at least not in the foreseeable future.
  6. The tanks will have to be four times the size to contain as much energy but that wouldn't be a big problem with something as large as a semi or bus. Your car however would be a different matter. Plus the fact you couldn't let your vehicle sit in the garage for a few days without the hydrogen starting to boil off as it warmed.
  7. Compressed hydrogen would be pretty useless in vehicles, you would need tanks larger than the vehicle to give the same range. Liquid hydrogen's energy density by volume is only a quarter that of diesel and it must be maintained at -252 C to remain liquid, otherwise it will boil off.
  8. Nope, that's Putin.
  9. So with the low energy density by volume compared to diesel, they will need tanks four times the size to carry the same amount of energy. Doable on something the size of a semi. Also, the trucks should be burning it fast enough it won't boil off. It will be interesting to see how it works out.
  10. What will power these semis?
  11. There are some realities of hydrogen that will have to be dealt with. A: separating it from oxygen. B: Storage. It also has 1/4 the energy density by volume compared to gasoline. How much of a factor that is will depend on the efficiency of the fuel cell.
  12. Extracting hydrogen from electrolysis takes a tremendous amount of electricity. Most hydrogen is produced from natural gas by thermal processes. This requires very high temperatures which have to be produced from some kind of fuel. In its liquid form hydrogen must also be maintained at minus 253 degrees C.
  13. Actually now 8.8X the population, so an even more striking difference.
  14. And I'm asking why they can't.
  15. Why reclassify them if they are still classified.
  16. Trump isn’t Napoleon but he would like to be and so would his cult. Trump only gave up his power when his coup failed. He still hasn’t really given it up with his stolen election claims.
  17. They just aren't reporting what you want to hear.
  18. Well, why shouldn't they?
  19. Why can't they drive Cadillacs?
  20. Appeals court rules DoJ can resume review of classified documents found at Mara Lago. Third slap down for Trump this week. Unanimous decision by three judge panel, two of them appointed by Trump.
  21. So you are not prepared to back up your opinions. Good to know.
  22. You keep using those people as an excuse for your own behaviour.
×
×
  • Create New...