HYDROGEN +DIESEL ENGINES

[grober]

The race to make diesel engines run on hydrogen

Ordinary diesel trucks could be converted to a hydrogen-diesel mix, according to researchers in Australia.

www.bbc.co.uk

NOTE this is an IC engine not a fuel cell one.

https://www.sciencedirect.com/science/article/abs/pii/S0360319922036771?via%3Dihub

 

[whitenemesis]

I'd rather have one of these...

Toyota And Yamaha Are Developing A 455 HP V8 That Runs On Hydrogen

The engine comes from a coalition of five Japanese manufacturers focused on keeping combustion alive: Toyota, Yamaha, Mazda, Kawasaki and Subaru

jalopnik.com

 

[grober]

Toyota showcases experimental hydrogen-powered GR Yaris
this was more than a year ago mind!

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[grober]

Come to think of it I think we have been here before!

Hydrogen power internal combustion engines | General Discussion

Some good progress being made by Toyota and JCB, UK. There is hope for us petrol heads, Zero emissions internal combustion engine.... nice.. Maybe one day the V8 will be king again, powered by hydrogen....And we will become know as Hydrogen heads instead of petrol heads? LOL...

forums.mbclub.co.uk

 

[Red C220]

This was the most simple explanation of why Hydrogen power has yet to become a sensible option. That doesn't of course mean it can't be viable in the future, but right now it doesn't stack up.

To my (admittedly non scientific) mind, synthetic fuel would make more sense if it can be made in a way to utilise existing tech and existing ICEs with little modification.

Full article here and is more concerned with freight and goods vechicles.

Fraunhofer study: Hydrogen will not play a major role in road transport - electrive.com

The Traton Group sees an analysis by the Fraunhofer Institute as confirming its strategy with its focus on battery-electric drives. According to the study, electric drives will also dominate the heavy-duty sector, and fuel cells will remain a niche application. On the other hand, Daimler Truck...

www.electrive.com

 

[grober]

To be fair to the Aussies they do say their diesel hydrogen engines are aimed at the mining industry. Here range would not be an issue since any big earthmoving trucks would never be far from a refuelling station on site. I wonder if the use of compression ignition engines with a hint of diesel raises the thermal efficiency of the hydrogen fuel in comparison to neat hydrogen?

 

[Bellow]

I wonder if the use of compression ignition engines with a hint of diesel raises the thermal efficiency of the hydrogen fuel in comparison to neat hydrogen?

No, as far as I can make out from the linked tech paper, diesel is only there as an ignition source and the hydrogen is being introduced partly as diesel usually is to 'burn off the nozzle'. This slows the rate of pressure rise which is destructive when a fully homogenous hydrogen and air charge is present then combusted.

 

[BTB 500]

Saw today that JCB now have an MB Sprinter van fitted with their hydrogen engine:

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Vans are heavy and have lots of aerodynamic drag so really aren't good candidates for electric power other than on relatively short urban routes (deliveries, local trades) ... hydrogen power would make a lot more sense IMO.

 

[st13phil]

Vans are heavy and have lots of aerodynamic drag so really aren't good candidates for electric power other than on relatively short urban routes (deliveries, local trades) ... hydrogen power would make a lot more sense IMO.

^ This neatly illustrates that there is no single alternative to fossil-fuelled ICE power units due to the vastly different duty cycles experienced - something that has been (almost) completely lost in the headlong, politically driven, rush to BEV's.

 

[C43AMG]

Harry Garage have a couple of very interesting interviews with Lord Bamford

 

[grober]

PROBLEM with Hydrogen is again one of fuel storage and distribution---OK on a large mining or earthworks site with a central supply unit localised there temporarily but virtually no national distribution network for trunk roads- as yet?

 

[Bellow]

PROBLEM with Hydrogen is again one of fuel storage and distribution---OK on a large mining or earthworks site with a central supply unit localised there temporarily but virtually no national distribution network for trunk roads- as yet?

Primarily storage.
Industrial gas bottles at 350bar store a few kg at most. Toyota's 95kg carbon fibre stores 5kg of hydrogen at 700bar. 95kg of carbon fibre - anyone want to price that?

 

[BTB 500]

Just as aside, a company in Germany has flown a liquid hydrogen fuelled aircraft this week ... this has an estimated range of over 900 miles. Fuel cell (electric propulsion) rather than ICE though.

H2FLY

Realizes hydrogen-powered zero-emission aviation. Made in Stuttgart, GER.

www.h2fly.de

"Compared with pressurized gaseous hydrogen storage (GH2), the use of liquified, cryogenic hydrogen (LH2) enables significantly lower tank weights and volume, therefore leading to increased aircraft range and useful payload."

 

[grober]

Just as aside, a company in Germany has flown a liquid hydrogen fuelled aircraft this week ... this has an estimated range of over 900 miles. Fuel cell (electric propulsion) rather than ICE though.

H2FLY

Realizes hydrogen-powered zero-emission aviation. Made in Stuttgart, GER.

www.h2fly.de

"Compared with pressurized gaseous hydrogen storage (GH2), the use of liquified, cryogenic hydrogen (LH2) enables significantly lower tank weights and volume, therefore leading to increased aircraft range and useful payload."

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[Bellow]

Hydrogen flight isn't new. Here's one made earlier.



The little bit at the top is cabin, the rest fuel tank..
Fair enough, the German flight is the first to use liquefied hydrogen but is expending 30% of the fuel's energy cooling it down to minus 253C really viable at scale?

 

[BTB 500]

Fair enough, the German flight is the first to use liquefied hydrogen but is expending 30% of the fuel's energy cooling it down to minus 253C really viable at scale?

For aircraft, quite possibly. I think it's the only viable alternative to conventional turbine or piston powerplants ... battery electric systems can't give the range needed for most passenger/freight operations.