Doping an internal combustion engine with water vapor

Edits and changes to engines, experiences, findings and ideas.
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Flytox
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by Flytox » 25/08/14, 19:42

The change to get the jet boxwood from below (a little on the side anyway : Mrgreen: ) + boiler insulation significantly changes the behavior. In just a few hundred meters the steam rose suddenly to + 160 ° C. It is quite unstable at low loads of 70 at 160 ° C between (70 at 100 km / h) but much more stable at higher speeds.

The pressure does not want to go up for the low loads. After a cold start, it takes a good ten kilometers for the pressure to start rising. It is regular and with a lot of inertia (several minutes) to arrive at about 3 bar at 90 - 100 km / h.

By the way, I found a name for this new "Pantonnation". This is the system ArmsTone Contraction of Armstrong and Pantone : Mrgreen: We could also do PanStrong .... Yapluka to make it work : Mrgreen:

There is a vapor leak that is difficult to locate. The deck behind the engine is wet but the pipes are dry .... and the pressure rises only at good speed ...... :frown: : Mrgreen:
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by Flytox » 24/10/14, 10:31

Assumption: There must be a problem with causing "large" drops of water with the steam (the dead volume above the water in the boiler is very low). This would contribute to partially / momentarily "plugging" the nozzle. (The current boxwood nozzle is pierced at 0.8 mm).

The next test will therefore consist in inserting a "filter" before the boxwood nozzle to retain the drops of water, a bit like André did with a felt at the outlet of the bubbler. Here too, the problem of the materials to be used is difficult. (very fine mesh (a few µm) resist 6 bar pressure at 180/200 °, resist water, steam .....) If anyone has an idea. :P
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Reason is the madness of the strongest. The reason for the less strong it is madness.

[Eugène Ionesco]

http://www.editions-harmattan.fr/index. ... te&no=4132
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by Flytox » 08/03/15, 23:31

Diagram of changes in court:

Image

Not yet fully stocked ....
The safety valve is calibrated / checked around 6 bar ... cold air! Hot steam with the vibrations of the pot ?????

To filter large water droplets, mounting a porous bronze from a pneumatic equipment exhaust.
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Reason is the madness of the strongest. The reason for the less strong it is madness.

[Eugène Ionesco]

http://www.editions-harmattan.fr/index. ... te&no=4132
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by Flytox » 03/09/15, 20:22

Despite appearances, it goes a little bit ... : Mrgreen:

For the development, it seems to me more and more essential to go through a "simulator" to validate some elements (boxwood nozzle, cooling power of the condensation chamber, water flow etc ...) before build something similar to the diagram above to mount on the car.

The "simulator" will certainly be made from a "vaporeto" type "steam cleaner" to have a "constant" source of steam, at least much less variable than the exhaust in road use .... .: Mrgreen: On the steam outlet pipe will be grafted an instrumented condensation chamber (pressure temperature).
After to instrument the measurement of high voltage .... without grilling the temperature and pressure measurements .... yakapaseplanter : Mrgreen:

By rereading / translating / interpreting the docs on Armstrong's machine it appears that the flow of condensed water is "critical" for operation at the boxwood nozzle. Sooner or later there will be a need for a kind of slaving between the cooling of the condenser and the flow of steam leaving the boiler and all within a "narrow" range of temperature and pressure.
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Reason is the madness of the strongest. The reason for the less strong it is madness.

[Eugène Ionesco]

http://www.editions-harmattan.fr/index. ... te&no=4132
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by Flytox » 06/09/15, 20:55

Blank assembly, to do the tightness test (at 6 bar) before putting the thermal insulation on the boiler, safety valve, porous bronze chamber, flexible pipework etc.

We also see the pressure switch and the solenoid valve. The foot pump can inflate the orange cylinder to have a minimum of pressure reserve.
Yes, the solenoid valve (1 / 2) is huge / left over. : Mrgreen: not found better in the budget ....

Image

Image
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Reason is the madness of the strongest. The reason for the less strong it is madness.

[Eugène Ionesco]

http://www.editions-harmattan.fr/index. ... te&no=4132
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by Flytox » 11/09/15, 22:43

The editing continues:

Image

With thermal glass tape insulation usually used to repair exhaust mufflers.

Image

The boxwood nozzle in the center of the "sphere" is mounted differently from the first version. Here the flow of steam coming out of the boxwood nozzle does not touch the mass. (In the document on Armstrong's machine (a little rough), there are the 2 versions without comments on efficiency). This model seems odd, in fact the lip which holds the boxwood in place in the sphere is angular and therefore makes a point effect very close to the jet of vapor which is of opposite charge ..... an occasion for short circuit of the charges , where an express fact?
For the next nozzle, the assembly will be all round in the area.

Image

A thermocouple K takes the temperature just a few mm before the box nozzle in the mini condensing chamber.
The electrical wiring of the new accessories is almost finished. It remains to adjust the water pump flow ...... Hopefully tests tomorrow ..... : Mrgreen:
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Reason is the madness of the strongest. The reason for the less strong it is madness.

[Eugène Ionesco]

http://www.editions-harmattan.fr/index. ... te&no=4132
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by Flytox » 12/09/15, 22:31

For the adjustment of the pump, it was more complicated than expected ...

Image

She took the water and got stuck (rust between the rotor and the stator). It seems that the water did not come from the pump part that would have leaked, but rather the plastic cover and its ventilation on the motor side.
In fact when driving when it rains, the lower part behind the bumper where the pump is located, must rinse much more than expected despite the plastic fairings ....

In short, unblocking cleaning repair of the pump, moving the pump more sheltered, put in vertical position (if water comes in, it will come out by gravity side pump and no longer motor side).

After ..... he had the check valve leaked (changed), then when the pressure is finally mounted, there were leaks on several connection .... once the connections changed / repaired the pressure is climb a little more .... and it's the pump covers that started to leak ..... once tightened and arrived at 5 bar ..... another connection begins to gougoutte .. ..: Cry: : Mrgreen:
There are days like that or nothing is right the first time, then it started raining, yapluka put everything away ... that's it for today. : Mrgreen:
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Reason is the madness of the strongest. The reason for the less strong it is madness.

[Eugène Ionesco]

http://www.editions-harmattan.fr/index. ... te&no=4132
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by Flytox » 04/10/15, 22:53

The first tests were disrupted. A "thermocouple" problem causes the read / record on the 4-channel recorder to only work for 1 thermocouple at a time .... As soon as there are 2 or more, they start saying no whatever. : Cry:

According to a doc found on the net, it would be a "mass coupling" problem. This especially since the temperature measurement just before the boxwood nozzle is made with a brazed thermocouple .... to ground. If anyone has an idea to restore the measure ....:P

Another difficult problem, apparently there is a big difference between the water flow set "to white" and in operation. The engine drank several liters of water in just a few km until it choked, but without knocking. : Mrgreen: Without a steam output temperature measurement, operation is not understandable / predictable.

In fact, it will be necessary to find the procedure to gently increase the flow of water, the pressure and the temperature of the system, each having a feedback on the other parameters. :|
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Reason is the madness of the strongest. The reason for the less strong it is madness.

[Eugène Ionesco]

http://www.editions-harmattan.fr/index. ... te&no=4132
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by Flytox » 28/11/15, 23:35

The development progresses after the burnout of the electrical control box ...... Now, I manage to reproduce a set of adjustments which makes it possible to increase in pressure the boiler in the zone where the pressure switch triggers. The pressure switch trips at 4.4 bar which controls the opening of the steam solenoid valve.

In fact, there is so little inertia / volume of steam in reserve, that as soon as the valve opens, the boiler pressure drops very rapidly (1 to 2 ''? Depending on the water flow settings) the pressure switch switches in the other direction and the valve closes. To increase the hysteresis of the system, I mounted an adjustable tempo allowing to wait a few seconds before controlling the opening of the valve.

After a few seconds, the system "runs out" and the valve closing time increases more and more because the pressure is more and more difficult to rise. The vapor temperature eventually drops from about 105-110 ° C to 65 °. If I insist on this mode of operation, the motor ends up hiccupping ..... it eats too much water in large drops when the valve is opened I suppose. :frown: : Mrgreen:
In short, driving and managing all this (pressure, temperature, water flow, various orders .....) becomes complicated ....: Mrgreen:

Current electrical diagram:
Image

Electric box in an older version.
Image
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Reason is the madness of the strongest. The reason for the less strong it is madness.

[Eugène Ionesco]

http://www.editions-harmattan.fr/index. ... te&no=4132
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by Flytox » 29/11/15, 22:59

In order to increase the pressure of the boiler, the 0.8 mm boxwood nozzle has been replaced by a brass nozzle 0.4 mm in diameter.

The time to develop the boiler (objective to stay around 4.5 bar with a steam outlet in the 140 ° easily and with an engine load corresponding to 90 -100 km / h). The nozzle is no longer in boxwood, produce high voltage with condensed water droplets will wait a little ... : Mrgreen: As a result, the temperature measurement problems encountered seem to have disappeared. (to confirm) :P

For more understanding the current "hydraulic" diagram is this one:

Image

The pipe end that carries the nozzle in the intake pipe serves as a condenser to allow the creation of the famous water droplets, but in the transitional phases of heating (before reaching the pressure of 4.4 bar in the boiler) may be a bit too efficient If there is not a minimum flow of steam in the nozzle, its assembly with the pipe cools too much, or even fills with fleet condensates? In short, when the valve opens, the fleet is thrown into the engine! Then he coughs for a second then continues. : Mrgreen:

It may be necessary to thermally isolate this condenser pipe, the time of a test to see if the regulation of the boiler pressure can be improved.
Limiting the volume of the condenser pipe (reducing the inside diameter) can also go in this direction.
1 x
Reason is the madness of the strongest. The reason for the less strong it is madness.

[Eugène Ionesco]

http://www.editions-harmattan.fr/index. ... te&no=4132

 


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