New type of hybrid engine turbine

[Flytox]

Hello vincent1606

but it is clear that the smaller the turbine, the faster it must turn. which requires large reducers

The drive pinion which works at 100000 rpm must do something generous to lubricate properly .... Anyone know if this has already been done reliably? In the 50000 rpm, this exists on a helicopter engine in the 500CV range.
A+

[Remundo]

the advantage of the turbine is the power / weight ratio

he big problem with the efficiency of turbines is their losses by hot source.

I think that with current technology we would be able to increase efficiency a little by capturing this free energy and converting it into electricity

Hi Vincent,

Indeed, a lot of thermal energy, still of good quality (> 200 or 300 ° C) is spat out.

This is why the most optimal installations are combined cycle : a 1st stage gas turbine (Brayton Joule cycle) + heat recycling in another machine, often a steam turbine, Rankine cycle with boiled water from the TAG exhaust.

The best thus come close to 60% yield. Reserved for electricity generation. Do you see that on cars? Capstone yes. To refuel 2 micro-turbines at 100 RPM

[Alain G]

Flytox wrote:

The drive pinion which works at 100000 rpm must do something generous to lubricate properly

It uses air bearings without any lubrication

http://www.capstoneturbine.com/prodsol/ ... /index.asp

Click "Learn More About Our Air Bearings"

Rémondo wrote:

Indeed, a lot of thermal energy, still of good quality (> 200 or 300 ° C) is spat out.

The same goes out of a piston engine, after having cooled in the cylinder head, the exhaust manifold and the exhaust.

[Remundo]

it comes out, but not as much.

I just remember:
- 25% micro-TAG efficiency (100 kW)
- TAG efficiency: 30 to 35% high power (> 1000 kW)
- TAG combined cycle TAV: 60% (power plant> 500 kW)
- Diesel efficiency: 40% full power <10 MW

In the field of transport, TAGs are for fun: toasting fuel per hectoliters every 10 minutes as a radiator for the sky ...

People who buy a car from TAG will no longer need central heating ... or a wallet

[Woodcutter]

[...] Each time you pass a sprocket to another, you lose a minimum of 5% power. So it's a bad point for the TAG that turns intrinsically too fast. [...]

Uh ...
Are you sure of yourself on this one then?
It seemed to me that rather around 0.98-0.99 the performance of a transmission between two gears damn good?

If your 5% is correct, it would mean that in a gearbox, we already lost around 20% power?

[Flytox]

It uses air bearings without any lubrication

http://www.capstoneturbine.com/prodsol/ ... /index.asp

Click "Learn More About Our Air Bearings"

The file takes a long time to arrive and does not want to open after several attempts ...

An air or hydraulic bearing is known (turbo technology) but that does not say how they lubricate the teeth of the drive pinion.
A+

[Remundo]

[...] Each time you pass a sprocket to another, you lose a minimum of 5% power. So it's a bad point for the TAG that turns intrinsically too fast. [...]

Uh ...
Are you sure of yourself on this one then?
It seemed to me that rather around 0.98-0.99 the performance of a transmission between two gears damn good?

If your 5% is correct, it would mean that in a gearbox, we already lost around 20% power?

Good evening ... Lumberjack small rivers energy gears ...

Mechanical is considered that a spur gear typically loses 5% of the power in friction.

Well lubricated without bubbling, with helical teeth, you can climb up to 98% beyond, it becomes false advertising.

For greased racks, we can go down to 75%, for conical couples lubricated by bubbling, 85% (order of magnitude).

For irreversible wheels / worms, less than 40%.

What a gear "hates" is speed et sliding from one tooth to another, because the power dissipated is proportional to both.

I let you imagine at 10 rpm, or better, at 000 rpm, the consequences on the sliding speed ... then of a cascade of gears. The mechanism begins to resemble a radiator

Otherwise, indeed, the gearbox eats a lot of power: I also "militate" the hybrid-series with removal of the BdV because electronic conversions are much more flexible and efficient than gears.

but the 5% is not added up rigorously. Usually, there are 4 passages between the crankshaft and the axle, which means that the transmission efficiency is 0.95 ^ 4 = 81.45%

A further 0.8 is multiplied, which is the performance of the tires. 0.9 which is the efficiency of the bridge, 0.25 motor efficiency, some other 0.98 here and there for the efficiency of tripod joints ...

I did the calculation once, when we take everything into account, the fuel efficiency on the road (to the wheel) is around 10%

On 10 L of gasoline 9 directly dissipated somewhere in the car, the remaining liter becomes kinetic energy, itself finally dissipated into the air pushed by the car ...

[Alain G]

Flytox

but that doesn't say how they lubricate the teeth of the drive pinion.

There is no pinion, the generator rotor is an integral part of the turbine rotor.

Damn it! Do you see the same document as me?

[Flytox]

Hello Alain G

There is no pinion, the generator rotor is an integral part of the turbine rotor.

Damn it! Do you see the same document as me?

No, I tell you that I can't see their video (empty link) and I swim in the questions

If they did not invent an electric generator which is capable of making current while turning at 100000 rpm I do not see well how they can do without reducer.

If it is a linked turbine, the gas generator and the engine turbine rotate at the same speed. In the case where they would use a free turbine which they would make turn much more slowly to attack directly an alternator without reducer, there would be there also a big problem of output, kind execrable inferior.

Make a screenshot of the engine and put it on the post so that we can understand each other

[Alain G]

Flytox

Sorry, the screenshot does not work on Windows Media.

Fortunately I found the same video on Youtube

http://www.youtube.com/watch?v=IJ_XJLTc ... re=related

It seems that they have developed a generator that works at this speed and I don't see why it wouldn't work even at 100 rpm.


Another video that shows how it works in 3D:

http://www.youtube.com/watch?v=Q1ytvkusAx4

And the Corporate Video:

http://www.youtube.com/watch?v=P3xDZLO3 ... re=related

I hope you’ll get your teeth into it! LOL

Seriously with this you will better understand why it is a great success.