[him a layin]

Re reply 23 - Putin is saying neo colonialism is finished .I don't know what that is supposed to mean but I assume it is something to do with his idea of a new world order.

i'm having a hard time caring about what putin says lately.

[GlennF]

i'm having a hard time caring about what putin says lately.

Unfortunately ignoring the crazies because they are crazy does not historically lead to optimal outcomes.

[AzCal Retred]

The crazies have siloed up. Maybe they don't want to leak top secret MAGA sedition plan info. Maybe they are having an attack of conscience. Just kidding...

[NVDucati]

The company’s CEO has stated that the automaker is thinking that it “might exit batteries.”

Rolls-Royce is thinking about stepping away from typical battery electric vehicles in favor of hydrogen cars once H2 technology has improved enough for mainstream use at scale.

https://www.hydrogenfuelnews.com/hydrogen-cars-rolls-royce/8559239/?awt_a=1jpsU&awt_l=JfUOR&awt_m=gkO3CaIL.u5DlsU

_ My personal opinion is that Hydrogen Cell technology, as opposed to H-Internal Combustion, will be the path and we won't have to junk any already existing E cars.

[AzCal Retred]

Fuel cells are about 60% efficient, and I was surprised to find that Otto Cycle ICE engines can be 50%-60% under the exactly right conditions. However, EV's can recover braking energy via regenerative braking, a trick it would be difficult to teach an ICE motor. A fuel cell Prius hybrid would be a slick rig.

And there's always the synthetic gasoline made from "recycled" carbon for the folks that can't give up "Ol' Betsy". The airline folks (synthetic JP4) will likely go that route as there's no polite or light way to store liquid H2 or high pressure (10,000 PSI? ) H2 on a 600 MPH aircraft. Liquid hydrocarbon fuels have amazing energy densities and are relatively user friendly.

[Casanova]

 An electric motor at start-up that deliveries only torque and doesn't spin yet has an efficiency of zero. You want to increase systemic efficiency Invent an motor that runs relatively clean directly on crude oil, that way sleepy Joe gets more time to sleep on the pillow with the red button underneath.

50-60% efficiency for an Otto cycle engine? Reference please, where does the figure come from? Greta's fantasy land? Or do you mean Diesel cycle?

[AzCal Retred]

Looks like 49% is the theoretical max for spark ignition motors. In any event it was a lot higher than the 20%-25% I've normally seen. Toyota's Atkinson cycle Prius engine is about 40%, The turbocharged Miller cycle engines are supposedly about 15% beyond that, so about 45%, on par with many diesels. So not 50%-60% like I stated, more like 40%-50%.
The main point I was trying to make was that fuel cells aren't necessarily all that more efficient than a good Miller or Atkinson ICE engine. I originally assumed that fuel cells were in the 80%-90% conversion efficiency range, I was surprised they were close to ICE values. If you heat recover fuel cells efficiencies can hit 85%, but that's probably a job for a stationary installation, or maybe a ship or train power supply.

https://en.wikipedia.org/wiki/Engine_efficiency#:~:text=The%20internal%20combustion%20engine%20efficiency,engines%20run%20around%2093C%2C%20200F.
The most efficient cycle is the Atkinson Cycle, but most gasoline engine makers use the Otto Cycle for higher power and torque. Some engine design, such as Mazda's Skyactiv-G and some hybrid engines designed by Toyota utilize the Atkinson and Otto cycles together with an electric motor/generator and a traction storage battery. The hybrid drivetrain can achieve effective efficiencies of close to 40%. (Toyota has measured 41%)
Diesel engines
Engines using the Diesel cycle are usually more efficient, although the Diesel cycle itself is less efficient at equal compression ratios. Since diesel engines use much higher compression ratios (the heat of compression is used to ignite the slow-burning diesel fuel), that higher ratio more than compensates for air pumping losses within the engine.
Modern turbo-diesel engines use electronically controlled common-rail fuel injection to increase efficiency. With the help of geometrically variable turbo-charging system (albeit more maintenance) this also increases the engines' torque at low engine speeds (1,200–1,800 rpm). Low speed diesel engines like the MAN S80ME-C7 have achieved an overall energy conversion efficiency of 54.4%, which is the highest conversion of fuel into power by any single-cycle internal or external combustion engine.[3][4][5] Engines in large diesel trucks, buses, and newer diesel cars can achieve peak efficiencies around 45%.[6]

https://en.wikipedia.org/wiki/Fuel_cell
The energy efficiency of a fuel cell is generally between 40 and 60%;

[GlennF]

Modern aircraft tend to use engine monitors that give you feedback on every cylinder (CHT, EGT etc etc)  allowing more precise adjustment for safety and efficiency.

https://sarasotaavionics.com/media/image/9705/gi-275-eis-wgea-24.jpg?size=250

Also, because aircraft fuel injection systems are continuous flow design, not the pulsed or timed designs used in automotive engines it has also become fashionable in aviation circles to fit Gami injectors ...

https://gami.com/gamijectors/gamijectors.php

https://www.youtube.com/watch?v=rvH4xlNC6gs

[AzCal Retred]

A 200 KW fuel cell output is about equal to 260 HP or so. That would power a medium size store or several houses, so ancillary sales should be brisk. Assuming it's modular & scalable, Hyzon may be onto something. H2 in general is better suited to industrial applications and handled by trained technicians.

Hyzon’s 1st Liquid Hydrogen Electric Truck Wows in Demo

https://www.hydrogenfuelnews.com/liquid-hydrogen-truck-demo-hyzon/8560542/?awt_a=1jpsU&awt_l=9EoFC&awt_m=gQA5d.jn785DlsU

The truck traveled over 540 miles on a 16-hour continuous run.
Hyzon Motor’s commercial demo of its liquid hydrogen fuel cell electric vehicle began its run in Temple, Texas and completed deliveries to eight Performance Food Group (PFG) customers near Dallas, Texas.
The liquid H2 truck traveled more than 540 miles in summer temperatures that climbed over 100-degrees Fahrenheit. Its continuous run took about 16 hours and was further than the distance from Sacrament to San Diego, California. The successful completion of the demo showed the viability of on-board liquid H2 to fuel long-distance, zero-emissions transport.

“With increased range and no added weight in comparison to our gaseous hydrogen trucks, we believe this liquid hydrogen demo run has demonstrated potential viability for the future of liquid hydrogen in commercial trucking,” said Hyzon Motor’s CEO Parker Meeks, in a recent company news release announcing the successful truck demo.
The long-distance range of the liquid hydrogen truck puts it on par with many diesel-powered trucks.
Meeks noted that once the liquid hydrogen truck is commercialized and powered by Hyzon’s proprietary 200 kilowatt fuel cell system, it “should be able to provide long distance range between 650 and 800 miles, on par with many diesel truck range requirements.”