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Hyundai Nexo sets new world record 887.5 km travelled on single tank of hydrogen

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Re: Hyundai Nexo sets new world record 887.5 km travelled on single tank of hydrogen

#351

Post by rootusrootus »

ajross wrote: post #257
new_realist wrote: post #128

Earlier quoted context omitted.

The Nexo is much less aerodynamic than the Model 3. One is an SUV/CUV, the other is a low sedan which looks like wet poop. The Nexo has more frontal area and a higher CD. And the Tesla is known for rigging its EPA tests for higher, but illusory, numbers.

> Tesla is known for rigging its EPA tests for higher, but illusory, numbers. The Tesla numbers are correct and verifiable, actually. The problem is that the EPA "highway" test is designed to capture the "average highway mile" driven by a US vehicle (which makes sense, it was designed to inform purchasers of aggregate fuel use). Here's the driving schedule: https://www.epa.gov/sites/production/files/2015-10/hwfetdds.…

> The Tesla numbers are correct and verifiable

There are caveats. The lower end Model 3s hit their estimates pretty reliably. The Performance trim usually misses by a pretty big margin for most people. There are exceptions to every rule, but I owned a P3D and hung out with other P3D owners as well, and this was a commonly shared experience.

Re: Hyundai Nexo sets new world record 887.5 km travelled on single tank of hydrogen

#352

Post by bdamm »

labcomputer wrote: post #231
Black101 wrote: post #224

Earlier quoted context omitted.

But it is much faster to fill-up an hydrogen tank then it is to charge a battery.

Really? It takes me about 5 seconds to charge my car every day, and I don't even need to leave my house to do it.

I'm not sure why you're being downvoted. It takes me about 5 seconds too. I plug in, I walk away. When I'm ready to drive, I unplug and get in. Not complicated, adds up to about 5 seconds. All the work is being done when I'm not around. In sum, since ditching gas, I have in aggregate spent much less time tending to my car's energy needs.

Re: Hyundai Nexo sets new world record 887.5 km travelled on single tank of hydrogen

#353

Post by olivermarks »

_ph_ wrote: post #285
olivermarks wrote: post #247

Earlier quoted context omitted.

My understanding is that hydrogen may be most useful for heavy good vehicles rather than cars. EVs could be great for short range urban delivery vans etc but long haul infrastructure may be built around hydrogen if the supply chain is viable.

Might, but if the Tesla Semi becomes a reality, the potential market for hydrogen in trucks becomes much smaller too.

The dynamics of moving heavy loads long distances has never favored electric power. Diesel currently powers tractor semis because it produces more energy than gasoline and creates much more low speed continuous load torque.

EVs are well suited to light loads and short distances, rapid acceleration and altitude change but are not well suited to long range hauling of heavy loads due to the enormous energy required.

Re: Hyundai Nexo sets new world record 887.5 km travelled on single tank of hydrogen

#354

Post by whatever1 »

bryanlarsen wrote: post #131
whatever1 wrote: post #79

Earlier quoted context omitted.

Plus the folks here probably forget what poverty looks like. In areas with no infrastructure the only way of getting energy is to literally carry it home for your stove or motorcycle. Gas is ideal for these cases. Hydrogen cylinders maybe? Batteries are definitely a no go to transport energy.

Those cars have 10,000 PSI tanks, and Hydrogen is notorious for leaking through everything. It's not an option for places with no infrastructure. Trickle charging a battery with a small solar panel is what no-infrastructure places are moving towards for charging phones and other electronics. That's not enough energy for cooking or transportation, yet, but I can see it moving towards that. Another option is synthetic…

You don’t have to have 10,000psi tanks. A regular 3,000psi industrial gas cylinder would do the job and it would store energy equivalent of around 8gallons of gasoline. The gas cylinder would weigh ~ 100 pounds. So totally feasible.

Now, do we have cheap appliances that consume hydrogen and produce work/heat ? Not yet.

Re: Hyundai Nexo sets new world record 887.5 km travelled on single tank of hydrogen

#355

Post by eloff »

eloff wrote: post #289
wiz21c wrote: post #239

Earlier quoted context omitted.

And if the ship sinks I guess hydrogen pollutes less than oil ?

Sure, but it's not a big concern as it's not that common.

To the person who disagrees - compared to climate change, it's the least of our worries.

No oil spills beats a few oil spills - but these are not an Exxon Valdez sized event, and they don't really matter in the grand scheme of things.

Re: Hyundai Nexo sets new world record 887.5 km travelled on single tank of hydrogen

#358

Post by wglb »

p1mrx wrote: post #339
wglb wrote: post #330

Keep this in mind when thinking about hydrogen: https://www.tinaja.com/h2gas01w.shtml

I'm curious whether https://proton.energy/ will pan out. They claim to be developing a process to extract hydrogen from natural gas wells, leaving the CO₂ underground. If that's possible, it would basically make hydrogen a fuel.

Possibly.

I do worry about

>Natural gas pipelines can transport large volumes of hydrogen without any hardware changes.

as hydrogen exposure makes metal brittle.

There are other moderately serious problems--hydrogen flame, unlike that of almost any hydrocarbon, is invisible.

Re: Hyundai Nexo sets new world record 887.5 km travelled on single tank of hydrogen

#359

Post by wglb »

WorldMaker wrote: post #305
wiz21c wrote: post #239

Earlier quoted context omitted.

And if the ship sinks I guess hydrogen pollutes less than oil ?

By a lot, mostly. The liquid hydrogen eventually doesn't have enough pressure/cold enough temperature to stay liquid so it turns back to gas and most bubbles out of the water (with some of it reacting with Oxygen and becoming more water). It's possible if it were a "big enough" and "concentrated enough" spill it might briefly create anoxic zones where fish will die. https://en.wikipedia.org/wiki/Anoxic_waters (But hu…

It is also a greenhouse gas http://agage.mit.edu/publications/global-environmental-impac...

Re: Hyundai Nexo sets new world record 887.5 km travelled on single tank of hydrogen

#360

Post by gnull »

trutannus wrote: post #203
gnull wrote: post #109

Earlier quoted context omitted.

It is explosive only when mixed with enough oxygen, much like gasoline or propane. Hindenburg did not explode, it burned (quite fast, I should add). As I understand, If you make a hole in hydrogen tank and set it on fire, it will just burn (don't try to do this at home).

> If you make a hole in hydrogen tank and set it on fire Right, the issue is though that in a collision you won't always just have a nice small controlled hole and burn. I've worked around Hydrogen before, and storage was always a tricky issue. I remember the regulations stating something like needing to store the tank with either Argon or Nitrogen beside it. Not really something I'd want in the back, or any part for…

Sorry, my bad, I misunderstood what you meant.
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