mickle
innit
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- 53.933606, -1.076131
Totally new petrol engine set to upset auto industry apple cart
- Thread starter mickle
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XmisterIS
Purveyor of fine nonsense
If it really is the huge leap forward that the inventors say it is in terms of fuel efficiency and if it can be made powerful enough to be useful as a car engine, I absolutely guarantee that the big oil companies will make sure it never gets off the ground.
Sounds too good to be true to me!
60% efficiency for a heat engine!!!
Has Carnot’s Theorem been re-written?
All Carot engines operating between temperatures Th and Tc
have the same efficiency.
No other heat engine operating between these temperatures
can have a greater efficiency
e=1-(Tc/Th) (without any other mechanical losses)
60% efficiency for a heat engine!!!
Has Carnot’s Theorem been re-written?
All Carot engines operating between temperatures Th and Tc
have the same efficiency.
No other heat engine operating between these temperatures
can have a greater efficiency
e=1-(Tc/Th) (without any other mechanical losses)
OP
OP
mickle
innit
- Location
- 53.933606, -1.076131
my brain hurts
Over The Hill
Guru
- Location
- Ridden off into the sunset
Does not really add up to me.
Basically it seems to be a jet engine but with a valve to shut off the chamber.
25kw is tiny that is about 30bhp which is about a third of a small car engine output.
If you ran a normal say 250cc pistion engine and linked it to a generator charging batteries and linked that to a motor running the car (as they are proposing) then you will probably achiever similar results in economy.
I am guessing it has little or no flexibility in running so has to be run at a constant speed. Otherwise you could run the car direct from it and not need to lug batteries and electric motors around.
Found some info here -
http://www.newscientist.com/article/mg20928035.100-shock-wave-puts-hybrid-engines-in-a-spin.html
I am no engineer but looking at the diagram in NewScientist there are two faults -
1 at point (2) of the diagram there is no compression. Nothing is being squashed to compress the mixture.
2. at point (3) when the mix is ignited surely it will push as much in one direction as the other? What is making it push one blade round but not equally push the other blade the other way?
Great if it works but I would like to see it in action before I threw money at Norbert.
Basically it seems to be a jet engine but with a valve to shut off the chamber.
25kw is tiny that is about 30bhp which is about a third of a small car engine output.
If you ran a normal say 250cc pistion engine and linked it to a generator charging batteries and linked that to a motor running the car (as they are proposing) then you will probably achiever similar results in economy.
I am guessing it has little or no flexibility in running so has to be run at a constant speed. Otherwise you could run the car direct from it and not need to lug batteries and electric motors around.
Found some info here -
http://www.newscientist.com/article/mg20928035.100-shock-wave-puts-hybrid-engines-in-a-spin.html
I am no engineer but looking at the diagram in NewScientist there are two faults -
1 at point (2) of the diagram there is no compression. Nothing is being squashed to compress the mixture.
2. at point (3) when the mix is ignited surely it will push as much in one direction as the other? What is making it push one blade round but not equally push the other blade the other way?
Great if it works but I would like to see it in action before I threw money at Norbert.
XmisterIS
Purveyor of fine nonsense
Smokin Joe
Squire
- Location
- Bare headed cyclist, Smoker
And how exactly can the oil companies make sure it never gets off the ground?
And before you say they will "ask their mates in the auto industry to bury the idea", the car companies and the oil industry are in a marriage of convenience, as soon as one can increase their profits by reducing their dependence on the other they won't hesitate.
The diagram strongly reminds me of the old Wankel* engine. That too has a rotary turbine-like action, but at least it's able to directly compress its fuel by exploiting the eccentricity of the cylinder. The Wankel engine put in some appearances on the road since the 1960s - never really caught on except in motorsport I believe. The seals were the main problem.
Wait and see, and don't expect too much...
* (carefully typed that word)
Wait and see, and don't expect too much...
* (carefully typed that word)
OP
OP
mickle
innit
- Location
- 53.933606, -1.076131
Mazda persevered, in the shape of the twin rotor engine of the current RX-8.
No - otherwise known as the Second Law of Thermodynamics - if it's suddenly become void, well, bring on the million monkeys to type the rest of this thread: I bow out...
Theoretically possible, if you have Tc at say 300K (room temperature), you would need Th at least 750K or 477[sup]o[/sup]C - pretty damned hot but not impossible. Or maybe they meant to say, this engine will operate at an efficiency which is 60% of the theoretical efficiency of a Carnot cycle operating between the same temperatures?
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mickle
innit
- Location
- 53.933606, -1.076131
Meh. Pete said 'Carnot cycle'! Geddit? 'car not cycle'. Eh? Eh? No?
IGMC
IGMC
buddha
Veteran
How I read it was it relates to having 60% (or so) less 'losses' than a conventional IC engine. Understandable, as there aren't the mass of cranks, pistons, rods, transmission etc whirling around.
They are not talking about the efficiency of the engine itself.
edit: I take it they putting one on each driving wheel perhaps?
They are not talking about the efficiency of the engine itself.
edit: I take it they putting one on each driving wheel perhaps?
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