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.
What happens if the 258bar air tank explodes now? A controlled relief valve?mzso wrote: ↑Sat Jun 08, 2019 11:28 pm
LNG would allow running at 4 or 5 lambda
Zynerji wrote: ↑Sun Jun 09, 2019 3:47 amWhat happens if the 258bar air tank explodes now? A controlled relief valve?mzso wrote: ↑Sat Jun 08, 2019 11:28 pmI 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?
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!
How so? The current PUs are already at 50% efficiency going to 60% doesn't change much.Tommy Cookers wrote: ↑Sun Jun 09, 2019 7:32 amLNG 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%
I doubt we'll even see that...NL_Fer wrote: ↑Sat Jul 13, 2019 6:23 pmDamn, 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.