2021 Engine thread

[mzso]

Why LNG? Why not hydrogen, produced from electrolysis from renewable energy, of course?

Why either? They both suck for volumetric efficiency.
Plus how would you keep LNG at -160°C on a racecar?

[Zynerji]

Why LNG? Why not hydrogen, produced from electrolysis from renewable energy, of course?

Why either? They both suck for volumetric efficiency.
Plus how would you keep LNG at -160°C on a racecar?

It would be in an insulated cannister, obviously. The inevitable rise in temp would be harnessed to maintain fuel pressure.

[mzso]

Why LNG? Why not hydrogen, produced from electrolysis from renewable energy, of course?

Why either? They both suck for volumetric efficiency.
Plus how would you keep LNG at -160°C on a racecar?

It would be in an insulated cannister, obviously. The inevitable rise in temp would be harnessed to maintain fuel pressure.

I don't think that's realistic for a tightly packed race car which produces 500 kW of heat. And what if the vacuum insulation (nothing else is really realistic) is damaged? Steam explosion?

[Zynerji]

Why either? They both suck for volumetric efficiency.
Plus how would you keep LNG at -160°C on a racecar?

It would be in an insulated cannister, obviously. The inevitable rise in temp would be harnessed to maintain fuel pressure.

I don't think that's realistic for a tightly packed race car which produces 500 kW of heat. And what if the vacuum insulation (nothing else is really realistic) is damaged? Steam explosion?

What happens if the 258bar air tank explodes now? A controlled relief valve?

I honestly think that LNG pods wouldn't be terribly hard to engineer, would allow refueling in under 3 seconds, and would remove all of the weight of the fuel pumps and other anticillaries. I expect the pods would be a multi-layer, but thin walled construction of aluminum, Kevlar fabric(similar to current fuel tanks), and an aerogel insulator in between. If it's designed with a built in motor to allow a twist-to-lock motion when it's seated into the chassis, this would be ideal.

Any method to allow safe refuelling, cheaply, should be encouraged. If the equivalent LNG/Gasoline ratio allows reasonable sized canisters (3 sets per race, one on each side of the car, so 6 total), then the drivers no longer need to manage tyres, and can do qualifying laps, start to finish, in every GP.

That's my take, but I'm sure some don't agree, and that's OK with me!

[Tommy Cookers]

.... I don't think that's realistic for a tightly packed race car which produces 500 kW of heat. ...

LNG would allow running at 4 or 5 lambda
the engine wouldn't be dumping 500 kW of waste heat (that's the point of running so lean)
eg maybe it wouldn't need radiators

it would need a 2 stage compressor etc but all that's bolt-on
it would tend to become a compounded ICE not a weakly compounded ICE
BTE maybe 60%

[mzso]

It would be in an insulated cannister, obviously. The inevitable rise in temp would be harnessed to maintain fuel pressure.

I don't think that's realistic for a tightly packed race car which produces 500 kW of heat. And what if the vacuum insulation (nothing else is really realistic) is damaged? Steam explosion?

What happens if the 258bar air tank explodes now? A controlled relief valve?

I honestly think that LNG pods wouldn't be terribly hard to engineer, would allow refueling in under 3 seconds, and would remove all of the weight of the fuel pumps and other anticillaries. I expect the pods would be a multi-layer, but thin walled construction of aluminum, Kevlar fabric(similar to current fuel tanks), and an aerogel insulator in between. If it's designed with a built in motor to allow a twist-to-lock motion when it's seated into the chassis, this would be ideal.

Any method to allow safe refuelling, cheaply, should be encouraged. If the equivalent LNG/Gasoline ratio allows reasonable sized canisters (3 sets per race, one on each side of the car, so 6 total), then the drivers no longer need to manage tyres, and can do qualifying laps, start to finish, in every GP.

That's my take, but I'm sure some don't agree, and that's OK with me!

• Where do the cars have 86 kg and 185l worth of liquid oxygen on board.
• A relief valve only helps with over-temperature, it won't help with keeping the LNG at the temperature required.
• 3 seconds for 133% as much (185 liters in total) of cryo-cooled LNG? How on earth?
  Even with three stops that's thrice 61 liters and thirty kilos + the significant weight of the cannister ( with the overhead required by the swappability it would seriously increase the weight of the cars as well.)
  If you propose something at least look up some facts.
• Swapping canisters would be much slower. They need to open up the cover of the car, detach the nozzle, dismount the cannister. Two people need to remove the bulky canister, then put in the much heavier replacement. Secure it, attach the nozzle. Replace the cover.
• Tire management is more easily solved by more durable tires. Plus what multiple pit-stops accomplish is plummetting on-track overtakes. (And there's no such thing a qualifying laps from start to finish, there never was. Tire management is always a factor.)

[mzso]

.... I don't think that's realistic for a tightly packed race car which produces 500 kW of heat. ...

LNG would allow running at 4 or 5 lambda
the engine wouldn't be dumping 500 kW of waste heat (that's the point of running so lean)
eg maybe it wouldn't need radiators

it would need a 2 stage compressor etc but all that's bolt-on
it would tend to become a compounded ICE not a weakly compounded ICE
BTE maybe 60%

How so? The current PUs are already at 50% efficiency going to 60% doesn't change much.

[Tommy Cookers]

running prechambers on LNG (or hydrogen) would allow higher lambda (and power) using gasoline-fuelled main chambers

[NL_Fer]

100kg/hr @10500rpm -> 110kg/hr @15000rpm
Mgu-K 120kw -> 200kw
Manual K deployment
Single mapping

[NL_Fer]

Damn, with 16 months till 2020 end off season test, do we even enough time to develop an new PU? An increase of fuel would require a redesign of ICE TC MGU-H, new injectors, new pistons, valvetrain.

I doubt we will see more than just another K with manual deployment paddle.

[AJI]

Damn, with 16 months till 2020 end off season test, do we even enough time to develop an new PU? An increase of fuel would require a redesign of ICE TC MGU-H, new injectors, new pistons, valvetrain.

I doubt we will see more than just another K with manual deployment paddle.

I doubt we'll even see that...

Increase SoC to 6MJ and the re-introduction of refueling are probably the only options left if the decision is made this October..?

[carisi2k]

Keep the same technology but reduce the engine size to 1 litre and allow 4 to 8 cylinders.

[PABLOEING]

¿more engines in 2021......i read 8 per year.....?¿more power......more fuel pero hour?

[NL_Fer]

¿more engines in 2021......i read 8 per year.....?¿more power......more fuel pero hour?

Nothing. Bigger ES and manual K deployment.

[ENGINE TUNER]

Keep the same technology but reduce the engine size to 1 litre and allow 4 to 8 cylinders.

If they allowed 4 to 8 cylinders everyone would run 4 cylinders, especially if dispacement was cut to 1L.