If a hydrogen car is 50 MPH faster to a diesel car, why are we looking at electric?

[aveatry]

i am trying to be kind as i dont do childish derogatory unhelpful or misleading i try to the best off my ability to be accurate helpful with out unessisary content that can be taken negatively when its only ever meant to be helpful-------and yes i do often waffle on --a lot as i try to be accurate and helpfull

I dont understand what you are on about when you say getting my post count up - what does that mean

 

[aveatry]

That sort of technology is always bought/sabotaged by oil companies, with a little help from the government and any other rich body who wants to keep us down in the mud whilst they themselves become richer. I'm sounding like a socialist loon, which I'm not, but it is mostly about power and politics rather than making things better/greener/cheaper for the masses. It's been done for millenia by those in power to keep the masses struggling and paying taxes.

Same/ similar reason the much safer Thorium was not perused as a fuel for nuclear reactors - It doesn’t provide the same weapons as the fuel that was pursued.

 

[big-all]

I dont understand what you are on about when you say getting my post count up - what does that mean

a response off putting water in the fuel tank is confusing as the car cant convert to a fuel as i said the post before you need perhaps 40% more energy input to convert to a fuel and as water is not a fuel you need the conversion to happen where an energy source and a plant can convert it to a usable fuel
the light hearted comments about post counts was trying to not lead the thread into a culdisac off negativity

 

[aveatry]

a response off putting water in the fuel tank is confusing as the car cant convert to a fuel as i said the post before you need perhaps 40% more energy input to convert to a fuel and as water is not a fuel you need the conversion to happen where an energy source and a plant can convert it to a usable fuel
the light hearted comments about post counts was trying to not lead the thread into a culdisac off negativity

Maybe its not there yet (fuel up with water) but I guarantee that it would have been if people could not collect it from the sky for free

 

[big-all]

Maybe its not there yet (fuel up with water) but I guarantee that it would have been if people could not collect it from the sky for free

it can never be there as water is completely non reactive in a high energy way you need to separate the component parts as in h20 as in remove the oxygen as a useless part as its readily available in the air about and stops the hydrogen reacting as a fuel source

 

[Justin Passing]

If the vehicle contains the energy to split the water into hydrogen and oxygen to then burn, then the original energy could be used instead. The electrolysis is only about 80% efficient. Can't remember why.

Hydrogen as a fuel isn't a problem, but it's not Green because making the hydrogen isn't very green. We don't have a really green way to get it,
though we do use excess wind or whatever power to separate it , which is the Green bit
Most is made from fossil fuels though - grey hydrogen.
There are several other reactions which win hydrogen, but not made very useful - yet.

 

[flameport]

Maybe its not there yet (fuel up with water)

It will never be there.

To create 1kg of hydrogen in a PEM electrolyser requires around 60kWh of electricity.
A small PEM unit of the size that might fit in a car would be a power of between 2kW and 3kW, meaning an entire day of continuous operation to create 1kg of hydrogen.
That 1kg burned in a combustion engine will get you about 20 miles of driving distance, so this is already total fantasy.

That ignores where the ultra high purity water is coming from, as you certainly can't just fill up from a nearby tap. Tap water would destroy the electrolyser in seconds. You could add the water purification equipment into the car, but that adds significant weight and volume. It also requires more electricity to operate.
Then there is the question of where the hydrogen will be stored, the only practical option in a vehicle being a high pressure cylinder. To fill that using an on-board electrolyser requires a compressor, which uses more electricity.

The only realistic way to get that amount of electrical energy in a vehicle is to shove a big battery in there, and now you have an electric vehicle.
An EV with a 60kWh battery will typically do 200 miles, 10x more than the fictional water to hydrogen engine affair.

 

[Justin Passing]

Different tack, but a couple of years ago some Ozzies had a solar powered car working, It had panels on the roof and bonnet, was lightweight and low performance, but in a sunny environment, practical to use as a commuter vehicle with no further charging. I wonder how that's going.