MHD {Magneto-Hydro-Dynamique} and research by Jean-Pierre Petit

Transport and new transport: energy, pollution, engine innovations, concept car, hybrid vehicles, prototypes, pollution control, emission standards, tax. not individual transport modes: transport, organization, carsharing or carpooling. Transport without or with less oil.
Padawan
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View Padawan » 13/02/06, 18:10

Hello all ,
so this self-powered MHD engine - did you understand how it worked?
OK ! Well ! I just read the message of a certain "Paldeolian"

OUCH !!
There is an article on an oil engine too, made of piping wound on a cone.
In short what particularly interests me is a simple reflection, if the fluid (liquid) coming out of the vortex has enough force to return to the entrance of the vortex
, then we are faced with a closed cycle machine. Yes
Flow velocity ... kinetic energy ... pressure drop ...
I would like so much ... but no ... !! ?? how is that possible!
Okay good! I see what you mean, but have you tested the manipulation ...
And did you hear about OCTOBER ROUGE the movie "Chenille MHD"
This is where I wanted to come from the start a "vortex MHD" or swirling motor would be feasible for boats or planes, because with the kinetic energy stored in the whirlwind
the propulsive effect would be improved ..... Well I spread out but as I told you the MHD as EHD can be used as a trick to improve certain systems as well in energy as propulsion or even motorization ( air intake on the carburetor or electrified mixture ................).
Good luck to all,
Padawan
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neant
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View neant » 13/02/06, 20:46

ouch, right on target, yes, i saw october red.
Regarding the improvement of the engines, well, I also tilted when I saw that the vortex was also created in nitrogen (which is part of the gases capable of operating an external combustion engine), and I quickly posted this idea to our work team (that of the Stirling generator).
The idea is to put such a system on the circuit of a stirling engine, or even better, an ericsson engine since the fluid works in a loop and not in alternation.
On the other hand, would this principle not consume too much energy compared to what the generator could produce.
Otherwise, I have not done the manipulation, I have no caustic soda, but I have 4 ring magnets from microwave ovens.
Besides, I also have the microwave cannon, the power supply, and the large capacitor, but I don't really see what it could be for.
As soon as I recover caustic soda, I try to see what it can do with the 4 magnets mounted in a tube and spaced. all mounted in a jar.
We'll see.
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gegyx
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View gegyx » 13/02/06, 23:42

http://quanthomme.free.fr/energielibre/ ... urAEC1.htm

The oil, in Richard CLEM's machine, had to be heated, and accelerated by a pump.
The displacement MHD is the consequence of an oriented electric and magnetic field.
All these facts need energy ... There would be only the vortex which would be surunitaire.

Caustic soda = NAOH = 30,5% soda lye at € 1, per liter in supermarkets.
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Rabbit
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View Rabbit » 14/02/06, 04:01

Little question, is the MHD reversible?
I mean, if instead of turning a gas or liquid
by feeding the electrodes, we rotate
water or gas to obtain current from the electrodes.

If it works, would it be possible to use the current
engine exhaust gas to get enough
current only to supply electrolysis?

Electrolysis which would be used to boost the engine or otherwise
to recover some of the lost energy.
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neant
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View neant » 14/02/06, 22:40

In my opinion Richard Clem's machine also keeps its functioning from Schauberger's discoveries. Take a look at Viktor's work.
Take the opportunity to also watch those of JL Naudin.

http://quanthomme.free.fr/energielibre/ ... urAEC3.htm
http://jnaudin.free.fr/html/repulsin.htm

If you have already heard of the golden ratio, or the logarithmic propeller, you will immediately make the analogy with a multitude of things that surrounds us in nature.
A water vortex follows the mathematical formula of the logarithmic helix.
As well as :
The shell of a snail and nautilus.
The branches of a tree too.
The arrangement of the center of a sunflower
A pine cone.
Pineapple peel.
A tornado.
Even more surprising we find this form in the area of ​​Cydonia on the planet Mars.
The assembly of Silbury on earth.
And many other examples ubiquitous around us.

What, then, is this force which orders nature to develop so much?
Coriollis' forces of gyration?
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Padawan
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to all




View Padawan » 15/02/06, 11:55

Hear Econologists!

Paldeolian I will answer you a little later (good continuation)

Reversibility of MHD
MHD is completely reversible, i.e. two modes of operation exist:
Motor operation, where a conductive fluid, subjected to a magnetic field, is set in motion when a current flows in a direction perpendicular to the magnetic field
Operation as a generator, where a moving conductive fluid, subjected to a magnetic field, is the seat of an induced current
In fact, an MHD system works exactly like a conventional electric motor and is based just like it on Laplace's laws. Compared to the electric motor, the conductive fluid (salt water or ionized gas) plays the role of the copper wire winding of the rotor. If you put current in the rotor, the engine turns, if you turn the engine a current is induced across the rotor (alternator operation). Studies are also carried out by car manufacturers on a single device which replaces the starter and the alternator: at start-up, the battery sends current and the device runs as a motor (to start the internal combustion engine), in operation the device is driven by the engine and works as an alternator (and recharges the battery). The advantage would be, among other things, a saving in space and simplicity and a more powerful starter (since dimensioned to also serve as an alternator)

Regarding the use of an MHD device in current production mode installed on the exhaust, the idea is a priori viable. Indeed, the exhaust gases still have significant energy (thermal energy: T = 500 ° C to 700 ° C, pressure, speed) which it is interesting to recover. It would undoubtedly be necessary to increase the speed of the gas, which would be achievable by playing on the configuration of the pipes (tightening, spiral path with use of the vortex effect, etc.), to improve the yield. However, the main problem is related to the electrical conductivity of the gas. In fact, for the MHD system to function, the fluid must be conductive. Even with temperatures of around 700 ° (temperature of a candle flame) the ionization rate [ratio of the number of ionized particles (electrons or ions) to the number of neutral particles] is in my opinion low, in the range of 0,1% to 0.001%. So even if the efficiency of the MHD is good (60% maximum against 30 to 40% for all other energy transformation systems: turbine, pistons ...) the energy extracted will be low if the maximum current that can pass through the gas is a few microamps. One solution would then be to multiply the stages of MHD generators in order to obtain a substantial current in the end.

Regarding the principle of energy recovery from exhaust gases and its use to improve engine operation, the concept is viable. However, it will have to be compared with the principle of the turbocharger (a turbine recovers energy from the exhaust gases and drives a compressor which puts the air under pressure at the intake. Indeed, we must see if, in terms of recovery d energy, it is not easier to connect an alternator instead of the compressor in a turbocharger system. If an MHD system has a better efficiency than a turbine, it is necessary to see to what extent the system can be implemented. space (size, mechanical resistance to constraints on a car, etc.)
So you see the MHD generators have already been studied and have even been designed since the 1960s developed by the Americans and Russians and some are used in sattellites with sodium as conductive liquid. As for gases, experiments have been done with argon at 6000K propelled in an MHD nozzle
At 2800m / s. And for space at the moment a new concept of ramjet, with an MHD generator retarder at the input of the stato and accelerated at its output by MHD ...
we gain speed and we recover current ... I am currently working on similar principles. But in your case what would be interesting to do after leaving a catalytic converter,
would be to insert a nozzle composed of a part with “cold” ionization (Plasma DBD) followed
of segmented electrodes with NbFe magnets constituting an MHD generator to possibly recover a reasonable current (this is only a hypothesis) but to think about it I think ...! Have you thought about creating a DBD at the entrance of your fuel, to create electrified polarized particles (ozone generator), The administrator could tell you about it
because I am trying to finish a manipulation which goes in this direction (but at the moment it is the time which I miss!)

A plus and good luck
Come back
n
: Idea:
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Rabbit
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View Rabbit » 16/02/06, 02:53

Thank you Padawan for the answer.
It sounds even more complicated than I thought
understand . It will take me several days for all good
to seize if I arrive there. I still understood that for the
DIY exhaust c was grated. Too bad, will have to find
something else. in the meantime, i finally found a speaker magnet. so i will start this experiment tomorrow
as soon as I find a minute.

8)
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View Woodcutter » 27/02/06, 20:05

Padawan wrote:[...] Concerning the principle of energy recovery from exhaust gases and its use to improve the functioning of the engine, the concept is viable. It should however be compared with the principle of the turbocharger (a turbine recovers energy from the exhaust gases and drives a compressor which puts the air under pressure at the intake. Indeed it must be seen if, in terms of energy recovery, it is not easier to connect an alternator instead of the compressor in a turbocharger system. If an MHD system has better efficiency than a turbine, it is necessary to see to what extent the system can be implemented (size, mechanical resistance to stresses on a car ...) [...]
It already exists! Finally, at the experimental stage ...

The recovery of "kinetic" energy from exhaust gases currently exists in 3 forms:
- the turbocharger, a very well mastered and industrialized solution,
- the turbo-compound, solution implemented by SCANIA on some of its engines, and solution studied closely by other engine manufacturers,
- the "TIGERS" (see this News) which is an alternator coupled to a turbine, which is currently being tested in Great Britain.

Furthermore, these systems can be mounted in series, like a conventional turbo-compressor followed by a turbo-compound.

Finally, as the news on the BMW "Turbo-Steamer" mounted, the thermal energy of the exhaust gases is also closely monitored!
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jean63
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View jean63 » 28/02/06, 01:25

Thank you for the info on the TIGERS, it's great this system, you just had to think about it, in addition to the production of electricity, it would drop by 5 to 10% the consumption by removing the belt transmission systems that make turn the alternators !! super from super:

This device, a particular generator of electricity, the "Switch Reluctant Generator", uses exhaust gases to turn a turbine coupled to an alternator. A bypass valve placed at the exhaust is controlled by the on-board computer, this valve allows a certain amount of gas to pass through the generator depending on the engine speed


Bravo from bravo to the Englishs. : Mrgreen:
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View Former Oceano » 28/02/06, 19:03

Especially since they claim 80% efficiency and a power output of 6KW with voltages ranging from 12 to 600V.

In short it is a pretty good thing which in my opinion would be even more interesting on a hybrid vehicle.
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