HYDROGEN ENGINE???

[Williy]

willy

 

[zzvyb6]

Not so fast. Hydrogen storage is a major problem requiring tanks containing 5000+ psi to hold enough to have any kind of decent range. Filling stations won't allow drunk, ignorant, and careless owners to operate the dangerous connections required, so tank swapping is required. Oil used to lubricate any of these engines will burn in small amounts at each cycle, and that small quantity nowdays will require downstream processing via catalytic converters (please don't call it a cadillac converter, that is so ridiculous). Plus oxides of nitrogen 'pollution' is also produced by the high flame temperatures, so we're back to EGR feedback to kill the efficiency. The government has not banned nitrogen in our air, (yet).
On the good side, any tank rupture resulting in a fire will see flames going straight up because it's so much lighter than air. That's important for EMS & fire teams. Crashes are still unavoidable.

Carbon atoms are the core element of the highest density fuels because they store so much energy in their covalent bonds. Ever wonder why people are essentially carbon based ? Nature lalways selects the easiest, simplest, and most efficient systems. Silicone based people are kinda rare in the universe unless the air temperature is like that of Jupiter's moons.

 

[zzvyb6]

BTW: When I worked for GM Engineering, we had a hydrogen powered vehicle project joint venture with Honda and Cornell University. This involved a hydrogen powered fuel cell to produce electricity for electric motor propulsion. The Chevy Volt was originally designed around an intended fuel cell powered drivetrain. But the States balked at having hydrogen filling stations and the very high pressure tanks. It's introduction was delayed by the need to now have a very small motor generator to supplement the battery. Driver's and passengers tend to like A/C, heat, a defroster, power windows, wipers, bright lights, and heated seats.

 

[Jerry/MT]

You have to think about the entire "system" not just the hydrogen powered engine or fuel cell.

What do you hope to accomplish with hydrogen power? Water vapor and the oxides of nitrogen are green house gases. What about the infrastructure to produce, store, and distribute hydrogen? What about the safety aspects of hydrogen fuel? If the goal is to get away from fossil fuels, then the infrastructure costs to do that are enormous. And for what?

Running an IC engine or a gas turbine engine on hydrogen fuel is old hat. Boeing flew a hydrogen fueled single engine on a 707 back in the late '50's.

 

[hiddentacocatneddih]

Wonder about stationary engines such as permanent generators and such. Especially in industry where hydrogen is supplied for process gasses so it is already available.

 

[Tractor Seabee]

All compressed fuel gases have the same problem. VOLUME = Range. Hydrogen being the lightest element compounds that issue and it is also leak prone. Welds and other connections that hold other elements and compounds may well leak under hydrogen pressures. Pressure of the gas = thickness of selected materials, weldability, =weight and mass of the containment vessel. Dragging extra weight around increases horsepower requirements and expands fuel requirement.

Catch 22 suituation. We are a longway, if ever, to see high horsepower requirements rely on electricity or compressed gases. Compressed natural gas, for these reasons has never been popular except for short distance travel. The pressures required/attendant energy and equipment costs negate user compression from utility source such as NG.

Industrial users of most gases store them in a liquid state either held under pressurenor in a cyrogenic container depending pressure/temperature relationship. Propane, butane, CO2 are good examples of pressurized storage.

 

[skramer360]

If hydrogen is so out of the realm of safety etc. etc. why is this available?

2025 Toyota Mirai | Toyota.com

Explore the 2025 Toyota Mirai which combines hydrogen with oxygen from the outside air to generate power, without creating tailpipe emissions.

www.toyota.com

 

[Gator6x4]

If hydrogen is so out of the realm of safety etc. etc. why is this available?

2025 Toyota Mirai | Toyota.com

Explore the 2025 Toyota Mirai which combines hydrogen with oxygen from the outside air to generate power, without creating tailpipe emissions.

www.toyota.com

Because your facts are different from misinformation. Your facts says the only by product produced by a hydrogen car is water.

 

[Williy]

Hydrogen vehicle info :

The first 44-tonne hydrogen tractor-trailer hits the road - Fleet Vision International

Belgian logistics company, Colruyt is the first to test a 44-tonne electric hydrogen truck in Europe. Dutch company VDL built the HGV, and it only emits water vapour and works with green hydrogen, generated with green power. The vehicle's fuel cell converts hydrogen into electricity to recharge...

fleetvisionintl.com

willy

 

[MHarryE]

For those who think compressed gases are impractical (disregarding back in the 50’s and 60’s many tractor models had LP gas options), visit Italy where many cars are converted to compressed natural gas. Cost trunk space with the glass wound cylinders, but filling stations common (they won’t let you fill your own at these stations). And my Italian friends with methane cars retained small gasoline tanks for driving outside Italy. Seamless switch, and I do mean switch. I drove one and tangled between methane and gasoline under full acceleration and noticed no difference. Italian reason for the switch was methane cost less than 1/3 that of gasoline per mile. So compressed gas on-highway is not new but hydrogen is. Cummins wouldn’t be spending the research dollars if they didn’t think it had a future, especially in high pollution places like coastal cities.