Comments by "Zrips" (@Zripas) on "Engineering Explained" channel.

  1. Not really, what stops hydrogen cars is actual laws of physics, you can't break those just because you really really want it...
    1
  2. BEV's doesn't count?
    1
  3. It needs to be at −252.9C or lower... I will not find a place on earth where you could use outside temperature to cool it down that much...
    1
  4. Because that will simplify everything and will make total sense... Why do you think there are no ammonia powered cars in production at the moment?... Because its expensive as hell to produce ammonia in mass... Similar thing with matrix suggestion on top of it being extra heavy.
    1
  5. China doesn't care about patents, by are they not utilizing this magical patented technology you are talking about? And where can I read about that magical patented technology?
    1
  6. Well yes, if they know how to break first law of thermodynamics... Then it's easy!
    1
  7. Because gas isn't measured by volume...
    1
  8. Yes this video is about Hydrogen which is quite different beast than generic LPG.
    1
  9. Why are they testing it on south Africa's roads? And just because they test something doesn't really mean that they will make it. Testing is fine, this is how you learn if this thing is actually viable option or not. Come back when BMW actually comes out with mass production hydrogen car already built, not empty promises or concept arts, but actually working and already built car.
    1
  10.  @stewartw.9151  You should take into consideration possibility that they are doing this just for the sake of it, aka wanting to make low production cars so that they could say "we have hydrogen cars" and that's that. We yet to see hydrogen car which people would actually buy, especially instances where people would want their next car be hydrogen after they owned one. Experience owning hydrogen cars is abysmal at best.
    1
  11. Its because only that one makes any sense at this point. Hydrogen could have been decent alternative to go with if there wasn't BEV's, but as we have those then going with hydrogen makes zero sense. You would need to build hundreds of thousands hydrogen refueling stations and thousands hydrogen production plants. Its investment in quadrillions range. Or we could simply invest more money into expanding electrical grid which would be exponentially less costly and better solution long term across the board.
    1
  12. Those are the past.
    1
  13.  @JEKitchens  gas and diesel isn't sustainable, sooner or later we will have to switch to something else, something what is based on renewables, you know, like batteries or maybe even hydrogen. This is why gas and diesel will remain the past due to the fact that those are not renewable resources, not even talking about pollution and inefficiency of it in general.
    1
  14.  @JEKitchens  How do you think oil forms? Do you think it will magically keep forming underground for next few billion years? It takes millions of years to form. Are you suggesting for us to make it in a factory? You think that would be more sustainable than making batteries or making hydrogen?... Do you even understand what renewables are? Its a thing you can't actually exhaust because, well, it keeps renewing. You know, like sunlight, like wind, like slowing water, like geothermals and so on. Oil isn't one of those even if it could replenish of few millions of years, key issue here is those millions of years to be renewed. Unless you want to ride a bicycle for that period of time while you wait...
    1
  15. Liquid hydrogen is non option for private passenger cars. Why you ask? Well simple, liquid hydrogen needs to be under -250C temperatures, if it gets higher then it boils off and if your car is just parked then all that hydrogen will simply be ejected out of your car on constant rate. Aka after filling your car you will have like 3 days before all that hydrogen just goes away. So non option. There are no such thing as hydrogen on the go, unless you are talking about liquid hydrogen being "converted" into gas form, but its not production of hydrogen and usage of that "hydrogen on the go" would be extremely misleading. So please take time to update your comment with facts from actual reality and not "facts" you got from facebook post.
    1
  16.  @LeeBarker-x3p  If patent run out then you should be able to atleast provide patent number for me to look it up and your non disclosure agreement should have runned out at same time patent became public. So what was it? because I have no idea what you are talking about here and what I should look up.
    1
  17. There isn't much of a difference between hydrogen burning and any other gas, including gasoline, so if those rotary engines do not work with regular fuel types, it will not work with hydrogen.
    1
  18. But its not infancy, HICE engine was invented in 1806, hydrogen fuel cell engine was invented in 1966. So no, it's not in its infancy.
    1
  19.  @Savannah1891  Issue is with basic physics, there is just so much of energy you can get out of hydrogen and there is just so much of hydrogen you can fit into your car... There might be some tiny improvements with billions invested, but there isn't much to improve. On top of this, hydrogen is really bad option as alternative due to looooong list of issues relating to it, so there is little to no chance for it to be anything more than someones expensive hobby.
    1
  20. Toyota Mirai has 3 huge tanks to achieve 400 mile max range on good day with back wind, with car which uses fuel cell technology which is 2x more efficient than most efficient combustion engine, aka v8 would need like 7-8 of those tanks to get that distance on a good day. So yea, you have a point, look into Mirai and you will realize how little sense v8 makes.
    1
  21. 1. Weight isint big issue as we can see from real world examples. 2. There is no such thing as hydrogen on demand, you have been scammed. 3. Again, being scammed. Stop watching facebook posts and blindly believing them, fact check. 4. And that refueling costs like 150-200 bucks... Who are you working for by trying to spread such silly things?
    1
  22. Mirai is hydrogen fuel cell powered engine, not internal combustion one...
    1
  23. Stanley Meyers was a scammer...
    1
  24. @tausifnazim5048 ICE type engine by its nature is less efficient than Hydrogen fuel cell type ones, so like, how the hell will that get solved exactly? You are burning/exploding hydrogen to create pressure and heat as by product, that heat is main energy loses. So you think that someone will invent cold hydrogen burning?...
    1
  25. Sounds as practical as having steam powered cars where you have to shovel coal into furnace at regular intervals manually... Hydrogen on demand will never be a thing, like, ever.
    1
  26. Yes, what could go wrong by having bunch of highly pressurized tanks across entire car, what could go wrong in case of accident... To put it simply, there is no reasonable way to put in bunch of tiny tanks all over the place, current cars already have 3 and its 2 tanks more than it should have.
    1
  27. You are talking about something what CAN'T exist. You need more energy to extract hydrogen from water than you will get back. To simplify, you need 2kg of hydrogen to make 1kg of hydrogen, and no, those numbers are not backwards.
    1
  28. Because laws of physics don't exist in your reality?
    1
  29.  @frankjames1955  You think that electrolysis runs on magical pixie dust? I will go with this until you realize where you made a mistake here, besides watching some scam videos on youtube.
    1
  30. Well if you know how to break laws of physics, then maybe we could use water.
    1
  31. I guess people who worked on this technology for decades and spend millions if not billions in R&D never thought about it... Or there might be another reason why it could not work that way...
    1
  32.  @chrishostasek5104  Or maybe you are just wrong?... Do you seriously think that there is some sort of grand conspiracy or just bunch of lazy people in the world that no one thought of something as simple as you just suggested?... Go for it, make billions by selling your patent here...
    1
  33.  @chrishostasek5104  Because using liquid hydrogen isn't an option. Just like entire hydrogen car idea, it only sounds good on paper, it doesn't scale in reality. Liquid hydrogen needs to remain under -250C, which as you can imagine isn't really possible to remain in a car when you might have ambient temperature at +30C. That temperature gradient is the main issue with liquid hydrogen even before you get into methods you will use to transport it from that tank to engine itself. Then you just have general practicality, safety and efficiency of system like this. I can see one major issue with it, what would be "hydrogen on demand" issue. You don't need constant supply of it, it needs to change based on demand and there isn't good way to just increase hydrogen supply at the moment you actually need it if you only using your evaporating method. At best you would need some battery in between which could store energy and equalize supplied power to the car to counter that slow change in hydrogen pressure, so yet another energy loss source.
    1
  34. Water isn't fuel.
    1
  35. Water isn't fuel... You need more energy to extract hydrogen from water then you will get back by using it, aka you are wasting energy and money.
    1
  36. Main issue with liquid hydrogen is to actually keep it at liquid hydrogen state, which would be under -250C temperature. You could make cars with liquid hydrogen, but those would constantly lose their fuel by simply sitting in your driveway. Not ideal thing when hydrogen costs you arm and leg and now it just constantly leaks.
    1
  37. Gatitasecsii Why? Like seriously, he literally presents actual numbers you could verify, he basically presents hard facts and not his personal opinion and you still think that he is being paid by Elon?... While Tesla doesn't even need that due to higher demand than supply of Tesla cars at the moment even without any marketing.
    1
  38. 1. Weight increase would be enormous, not even talking about increased price 2. What type of flexible material would you use to move liquids at lower than -252C? 3. Aerogel is extremely brittle, so not suitable for insulation, especially in environments with a lot of vibrations 4. No idea what you wanted to say here exactly. What exactly hybrid? Like hydrogen fuel cell? Then why even include combustion engine when you can achieve 2x performance with hydrogen fuel cell engines?
    1
  39.  @AmaroqStarwind  If you want to have extra battery in your car, then why not simply replace ICE engine with Fuel cell? What would be the point in having combustion engine? Its half the efficiency, would cost your kidney to maintain it. I keep seeing people mentioning matrix option, cool beans, but none managed to actually present actual numbers here. Like, how much of hydrogen can you store in given volume? How much weight would that be? How hard is it to actually insert hydrogen into that matrix? What about extraction? Cost in general? While it might sound cool to have that matrix, its just pipe dream.
    1
  40.  @AmaroqStarwind  Toyota will not follow with it anyways, at best they will make like 1000 of those cars and will sell like 200 in total. Its PR move, nothing else. Even fuel cell cars fail to be adopted, there are no chances for combustion ones to be anything more than someones expensive hobby.
    1
  41. Which part of 12 buckets you did not understood? There isn't enough space where your current fuel tank is. on top of this, due to high pressures hydrogen tanks need to be cylindrical which are worse when it comes to space savings, this is why most hydrogen fuel cell cars have 3 huge tanks all over the car making it extremely unpractical.
    1
  42.  @kcleach9312  You do realize that not everyone is fluent in English and that there might be more than one country in the world? Right? And I didn't made this video, so you need to atleast pay more attention to basic things here. Will try to use simpler words here. There is not enough free space in a car to fit all needed hydrogen for that car to remain practical in day to day life. Was this simple enough for you?
    1
  43. HICE engine invented in 1806, FCE engine invented in 1839, so no, its not a new technology and its not in its infancy.
    1
  44.  @randy-ke8vn  Emissionless would mean that car doesn't emit emissions while being used, not while being produced or recycled...
    1
  45.  @randy-ke8vn  And its the main one. There are ZERO products in the world which produce zero emissions, heck even hydrogen cars being in use produce small amount of emissions due to basic wear and tear. But it becomes nict picking than anything else.
    1
  46.  @randy-ke8vn  I was pointing out that you are nickpicking here with your original comment and then pointed out that you could go all the way with same approach... Doesn't really do any good here either way.
    1
  47. If your prototype sounds broken, then your end product will not even exist... It's usually backwards, when you have excellent numbers for a prototype and then it gets somewhat worse when it gets into real product
    1
  48. Hydrogen is energy dense by WEIGHT, its extremely bad when it comes by VOLUME, this entire video talks about VOLUME issue, not weight...
    1
  49. It's around 60% more energy required for same distance for Hydrogen fuel cell based car. That's excluding all the extra work, equipment and time you would need to produce it, store it, transport it, store it again and then distribute. Hydrogen only sounds nice as a newspaper title like "Car runs on water".
    1
  50. If you can keep that hydrogen under -252C, cool beans, but this is practically impossible and it would just boil off over time. Liquid hydrogen would ONLY make sense for quick usage, like you fill up and then go on 400 mile trip straight away, but if you have any plans to have this car in your driveway, liquid hydrogen will not work.
    1