RE: PH Origins: Fuel cell-powered vehicles

[Mr-B]

unsprung said:

Mr-B said:

borat52 said:

https://www.google.co.uk/amp/s/amp.ft.com/content/...

Paywalled

The headline of that FT article is displayed in a green stripe. Google that headline and you will be able to read the article, sans paywall.

At least... That's my experience on IP addresses in the V8-huggin', burnout lovin', Five Guys munchin' side of the Atlantic.

Found it

[AER]

I think the reason these vehicles aren't finding huge market penetration is the designers haven't stepped up the ugly enough. If they made these vehicles even uglier then success is surely theirs...

[RobDickinson]

borat52 said:

The answer to this is energy density.
Compressed hydrogen stores about 150MJ/kg
Diesel about 50MJ/kg
A Tesla model 3 battery (ie the most dense yet) 0.5MJ/KG

Hydrogen is an incredible fuel, it’s also minutes to fill up and not hours.

I think as someone above pointed out if anyone things pure electric is anywhere near mainstream they are misguided.

I can certainly see a breakthrough in hydrogen production and storage happening with just as much likelihood of a battery density breakthrough.

Yet the model 3 is around the same weight (1730kgs) as a similar BMW 3 series. I wonder what else in an ice car could be heavy?

And look, they hydrogen Toyota Mirai is 1850kgs, I doubt the hyundai is any lighter.

But yes you can fill up in 10mn instead of an hour. Unless you are the 6th car there that day....

Edited by RobDickinson on Wednesday 4th April 05:23

[unsprung]

borat52 said:

The answer to this is energy density.

Compressed hydrogen stores about 150MJ/kg
Diesel about 50MJ/kg
A Tesla model 3 battery (ie the most dense yet) 0.5MJ/KG

Such an eye opener. One sees clearly why, say, NASA would choose a hydrogen fuel cell when things like mass and size are critical.

Just for fun, and inspired by borat52, here's a table of specific energy and energy density. It's interesting to add things like uranium, coal, and wood to those listed above.

. Uranium 80,620,000 MJ/kg

. Coal 30 MJ/kg

. Wood 16 MJ/kg

What happened to the atomic cars that pundits of the 1950s were promising us? Run the family motor for 20 years on a single wafer the size of a pound coin!

[ruggedscotty]

that atomic car is here and with us.....

That nuclear power station that generates the electricity to power your wheels in your car ? Its just that you have displaced the nuke and not been greedy by allowing it to power other cars aswell......

[unsprung]

ruggedscotty said:

that atomic car is here and with us.....

That nuclear power station that generates the electricity to power your wheels in your car ? Its just that you have displaced the nuke and not been greedy by allowing it to power other cars aswell......

Well stated. And a lot safer and more engineering-savvy than having everybody run round with radioactive materials. lol.

I do like, however, the idealised concept of powering something for ages -- with only a little wafer!