Comments by "Engineering the weird guy" (@engineeringtheweirdguy2103) on "Donut" channel.

  1.  @AdrenalineandEpiphany  you’re assuming they’re around the corner. Assumptions aren’t fact. But whilst hydrogen is the most abundant element in the universe it is not naturally occurring in its pure form on earth. Which is a problem. That makes it hard to access.
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  2.  @AdrenalineandEpiphany  arc lamps and LED’s are fundamentally different technologies. They’ve just have the same outcome in some applications, in this example, light. But no, LED did not increase our kardeshev scale. Humanity still hasn’t reached a type 1 civilisation.
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  3.  @andreemilsen369  your article agrees that they are in general better than combustion cars and more eco friendly. In response to the batteries, I’m not surprised his HR experience and his degree in sustainable economics failed him in the technical field of chemical and mechanical Engineering but a quick google search show that’s with current technology EV batteries are greater than 95% recyclable. And whilst at current not many of them are recycled but rather re-used, as EV’s have taken up in popularity, we’ve started to see a S curve increase in battery recycling plants, similar to how the lead acid recycling infrastructure occurred. Which means as they become more popular they are recycled more. Don’t believe me? Google is a click away
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  4. You’ve never travelled much in an EV have you,
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  5. Actually it’s an 8 year warranty for Tesla. It doesn’t expire at 8 years. The battery life to 70% health for a Tesla battery is between 400,000 miles and 600,000 miles. (Depending on the vehicle)
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  6. Hydrogen does not make sense
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  7. Not really though
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  8. A few misconceptions here. Firstly, it being less efficient has 2 impacts 1. If I need to build 1 wind farm with all the emissions and impacts that entails, to supply the needs of 100 drivers with EV’s I need to build 3-4 wind farms to power the needs of those same 100 people with hydrogen cars. And 2.) hydrogen plants get their power from the energy grid, unless that nations grid is 100% renewable, hydrogen has 3-4 times more emissions per mile than an EV. And yes batteries degrade by hydrogen cars degrade faster, currently hydrogen fuel cells only last between 100,000-150,000 miles depending on the manufacturer. Why Hyundai expected to release a 200,000 miles fuel cell in late 2022. Additionally hydrogen fuel tanks are also limited in life. Most fuel cell vehicles Come off the assembly line with an expiration date printed on the fuel cap limiting the life of the car to 15 years. Meanwhile BEV batteries today are showing to have an expected life of around 500,000 miles to 70% health. Which is 30-40 years of driving for the average person. That means you’d have to build and dispose of 2-3 times more hydrogen cars, to meet the needs of one BEV lifetime. And whilst batteries aren’t the most friendly things to manufacture, it’s a good deal better than making and then disposing of 2-3 whole cars compared to one battery. Also fuel cells use platinum as a catalytic element which is by far more toxic than anything in a BEV.
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  9. The majority of Tesla owners are former BMW owners and Tesla has one of the highest customer satisfaction and retention rates of any car company. So… no you’re wrong.
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  10. And?
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  11.  @BrainHurricanes  if it also helps. The grid on averages doubled every 20 years. For example 20 years ago barely anyone had person computers, laptops, tables, mobile phones which were basically computers, smart appliance, etc, yet alone a set of these things for every member of the household. 20 years before they electronics were things like the occasional bender, maybe a washing machine or two. Even optimistically the transition to battery electric will take at least until 2050. And they are charged when grid demand is typically lowest, meaning better load sharing. Ultimately I don’t think it’s unrealistic. It would be if we thanos snapped our fingers and everyone’s cars magically were converted to electric. But that’s not how it works. But people always base this assumption about the energy based on that, or they think the power grid hasn’t changed since the 1950’s which is plainly false.
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  12. Ahh. No. Hydrogen is made via electrolysis which uses the same electricity from the same grid as you charge a BEV from. So the losses from power generation would be exactly the same for either BEV or hydrogen, making no difference at all on the outcome.
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  13. Actually not. Batteries do require a lot of energy to make but they don’t have to smelt, cast and machine an engine block, transmission or fuel tank. So overall, like for like EV’s only produce 15% more emissions to create than a combustion car. Which equates to about 1 ton. Meanwhile during operation, even from a coal based grid a combustion car will produce 20-30 tons more emissions than an EV will. This includes the cost of refine the fuel as well as the cost to generate the electricity. It also helps that EV’s are vastly more efficient than a combustion engine, so much so that it’s literally more fuel efficient to charge your EV from a portable generator than to use that same fuel in even a highly efficient combustion car much smaller than your EV.
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  14. 😂🤣 as a Tesla owner, I still find that hilarious!
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  15. well actually EV batteries will last approximately twice as long as an ICE engine will. Lasting the average person 30-40 years. After which they are re-used in less weight critical applications such as home and industrial storage for another 20 years before being recycled as EV batteries are approximately 95% recyclable. Meanwhile Hydrogen cars are limited in their lifespan to rough half of that of an ICE car. They come off the assembly line with an expiration date limiting the life of the car to only 10-15 years depending on the model. The fuel cells dont last very long either with most only lasting around 100,000 miles and the modern ones (i.e. the very expensive ones) lasting around 150,000 miles compared to modern EV's 500,000 mile + lifespan. So for every one of these massive batteries that you have to make, you have to make and then dispose of 3-5 whole hydrogen cars to cover the same lifespan. or 2-3 ICE vehicles to cover the same lifespan of an EV.
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  16.  @sawyerbass4661  as battery demand increases, the costs/reward of recycling batteries will decrease making it more affordable. However for now certain manufacturers like Tesla have already stated that they will recycle all of their EV batteries themselves.
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  17.  @AllThingsRamdom  in addition, I’m a Mechanical Engineer, my whole career, education, degrees and masters are based around this kind of technology.
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  18.  @MrFreezeplug  so, no cars that are usually purchased as daily drivers today then and 90%+ of all cars on the road today. Gotcha. So because EV’s share a vulnerability with every other car being sold today and more than 90% of all cars currently on the road. EV’s are therefore bad?
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  19. I think you mean the opposite, hydrogen stations cost around $1.5 million each, and the cost of hydrogen fuel is far more than fossil fuels. And lastly, the only way to make the amount of hydrogen required is with fossil fuels, actually emitting more emissions than if you just used a normal combustion engine. Meanwhile the cost of running an EV is 1/10th the cost of combustion fuels, to add a charging station to any location can cost as little as $600, or $25,000 for a super charger. Because hydrogen requires a huge amount of grid electricity, the energy infrastructure required to accomodate a hydrogen infrastructure would need to be 3 times larger than for EV’s.
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  20. you need to pay closer attention. They're 80% from the grid to the wheels, Hydrogen is made via electrolysis which requires 3-4 times the same amount of electricity from the same source that charges EV's. So counting the efficiency of the power production would not change the end result at all.
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  21. ……. Actually… Robert Downie jr spent time with Elon to develop his iron man character…. So…
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  22. The cars themselves are shielded. There is less emf in the vehicle than you get from standing outside in a field. Additionally the same emf output would be found in hydrogen as it too is electric. Further more there have been comprehensive studies on emf. It has no affect of your cell function at all. Otherwise the device called a mobile phone, which you keep in your pocket, hand or next to your face 24/7 which emits some 400 times more EMF than an EV does, would have done more damage by now.
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  23. You can’t do that with hydrogen either. Between two comparable sizes vehicles, hydrogen only gets an extra 75 miles to a tank. Assuming you can find somewhere to fill up at all. But if you break it down over a 1,000 mile road trip modern EV’s will only take you an extra 20 minutes to 1 hour more depending on the range.
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  24. Hydrogen cars weight as much and often more than their BEV counterparts
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  25.  @michaelcrook-rubery6648  the first hydrogen car was released in 2014. That paper was not prepared for the fact that hydrogen cars would need more tanks (it assume a single intimately large tank). It was not prepared for the need to have batteries for acceleration and was also not prepared for the fact that hydrogen cars would be required by law to reinforce their chassis to divert crash energy around the tanks. The significant reinforcement is what added the bulk of the extra weight. Also worth noting that the paper was released early 2009 meaning the information was compiled in 2008. The first mass produced EV (Nissan leaf) wouldn’t be produced until late 2010. Try a different article.
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  26.  @michaelcrook-rubery6648  just compare two mid-sized sedans. The hydrogen Toyota Mirai, and the BEV Tesla model 3. Both midsized cars, the Mirai weighs 1,900kg, the model 3, 1,840kg.
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  27. It is, but it’s also not a production car.
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  28. Could you shut up? Take this somewhere it’s relevant.
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  29. …. Except to requires the use of oxygen..
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  30.  @neetard7360  well actually. In a pure oxygen environment, removing oxygen doesn’t tone down the oxygen. It’s just reduces the pressure. Astronauts in space are already at something like 1/8th seal level pressure because A, it’s pure oxygen so they don’t have any issue with low pressure as long as they can still breath, and B.) to reduce the pressure forces on the craft/suit they’re in. Oxygen in earth is toned done not because of the amount of oxygen but by having other things in the air like nitrogen and argon.
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  31.  @neetard7360  hahah. Yeah you did. But that’s what makes these things great. The brain storming. A cure for cancer was found by a 16 year old so who knows. Keep thinking like that and you might think of something no one had thought of yet.
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  32.  @neetard7360  it’s wouldn’t produce a lot of fuel but it would be more beneficial to use it to grow more plants due to conservation of mass. However using plants to cycle CO2 into clean air is a good idea. It’s already implemented in the international space station to a degree to extend their O2 supplies.
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  33. But less
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  34. Actually according to most recent studies, solar is approximately 20-30x better per kWh than coal or gas is. Infact the “buyback” when compared to coal is only 3 years out of a 25-30 year lifespan of a solar panel. So no, they categorically do not produce more CO2 to be made than all the energy it will produce in its lifetime. And the majority of the emissions to create solar panels is from electricity production to supply the energy to create them. Which as the grid becomes more green, reduces towards zero. So again. False.
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  35. well considering that modern EV's come with an 8 year battery warranty and are designed to last up to or over 500,000 miles, I would say that wouldn't be a problem. Additionally you'd be pleased to hear that Tesla has committed to recycling all their own batteries. What you might be suprised to hear is that hydrogen cars last a whole lot less. They come off the assembly line with an expiration date printed on the fuel cap limiting their life to just 10 years from manufacture and the fuel cells themselves are only rated to last around 150,000 miles.
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  36. you dont drive the full charge of the car every day. A full charge would cost around $18.75 but that would be like saying it costs $80 per tank, then saying that would cost you $80 per day. But with the average energy price in the US of 28 cents per kWh, if you travelled 75 miles per day, (which for something like a Tesla is around or less than a quarter of its total range), you would use around 16 kWh, which would cost you $4.48 per day if you didnt have solar or an EV tarif which most energy companies offer. Over 365 days it would cost you $1,635.20. Mean while going 75 miles in a car with a fuel consumption of 29 mpg, with the average price of fuel in the US being $3.543 per gallon, it would cost you approximately $9 per day in fuel, over 365 days it would cost you $3,344.47 per year. almost 3 times as much as a BEV per mile. and power outlets at your home only allow for around 10amps for an outlet. if you're lucky you might get to 15 or even 30 amps. But i'd be surprised if you used 70 Amps. in addition to this the gird is capable of supply every single house in that street with maximum load. Its called frequency regulation. Also no, that's not how power boxes work. The amps provided are based on how many fuses you have, the fuses will trip if that amp level is exceeded to protect the relatively thin wiring inside the home. heavier gauge wiring can handle more current, its relatively trivial to install more if needed.
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  37.  @theodorvalentinghita1779  what makes it more impressive is that EV battery service life is measured at being to 30% degradation. In other words, at the end of your service life you still have 70% of your original capacity. For my model 3 SR+ that will be 175 miles, easily enough to continue my 75 miles daily commute. For an LR, that’s 228 miles range. So both still very useable beyond their service life.
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  38. Imagine spending thousands of dollars on a car just for the company to release a new model a few months later in the next financial year. Wild. who would do that... oh wait...
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  39. EV's have a much longer lifespan than 10 years. Most having a warranty alone of 8 years or more. Current EV's are designed and are showing to last around 500,000 miles. Double that of a standard ICE. Meanwhile Hydrogen cars come off the assembly line with an expiration date limiting their life to 15 years and their fuel cells are only rated to last between 100,000 to 150,000 miles.
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  40.  @harmeetsinghmadan6213  any google search will confirm that modern EV’s have lifespans well and truely exceeding 10 years, hell the model 3 over 100,000 miles shows an average degradation of just 2%, where 30% is consider end of life.
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  41. It’s not making a comeback. In 2020 there were a grand total of 3 different hydrogen cars as your total market offering. In 2021 Honda dropped their nexo offering and now there is a grand total of 2 cars to chose from now. The market offering dropped by an entire third and you think it’s making a comeback?
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  42. Actually the majority of Tesla owners are former BMW owners more than any other category.
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  43.  @lieffian  but energy costs of producing batteries eats into profit margins. As such companies like Tesla have been instigating energy efficiency programs to reduce the energy required for manufacturing an the same study which was done in 2016 was re-done last year. Now the production and compatible sized EV’s and combustion cars show 0.5 tons less emissions per EV than combustion.
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  44. You mean hydro-carbons
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  45. hydrogen at ground level is nearly non-existent due to how light and boyant it is. Hydrogen at the way wayy wayyy upper atmosphere is more common, but due to such low pressures and higher planetary circumference, it is spread very thin.
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  46. You do realise that hydrogen is also made from that dirty electricity source as BEV’s charge from? Not only that but it needs 3 times as much electricity per miles worth of hydrogen. Which also means if you had a completely renewables grid, it would have to be 3 times larger to accomodate hydrogen than BEV? Maybe try not to accuse people of being paid media puppets when they’re just report on the facts.
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  47. well whilst the batteries do degrade, today its very slow, with modern EV batteries lasting to over 400,000 to 500,000 miles to 70% of their health. However in comparison to hydrogen they also have Batteries onboard but alot smaller 1.5-2kWh, which, because they're much smaller, wear out much faster. In addition, a fuel cell is only rated to last around 150,000 to 200,000 miles before it needs replacing and hydrogen cars come with an expiration date on the fuel cap limiting the life of the vehicle to only 15 years due to hydrogen's embrittlement of materials it comes into contact with. So whilst EV's do degrade over time, they do last much longer than hydrogen cars, and even last longer than Internal Combustion Engine vehicles.
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  48.  @HarkanKleinerAls3  for somereason donut media dont let people post most links in the comments. The comments are held behind spam filters. But google 400,000 miles or 500,00 miles tesla and you'll find ALOT of blogs and articles about teslas which have already reached those milestones. You can also good cycle life of Tesla batteries which will lead you to information telling you that most EV's these days have 1,500 cycles to a life (70% health). Meaning 325 miles 1,500 times, you get the maths.
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  49. This is a naive comment
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  50. It’s actually not. Hydrogen is still a stupid idea for a list of reasons longer than my arm
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