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Bubbler Project Page 1

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This Project was last updated on: September 25, 2006 10:04am
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WARNING! Many, if not all of the projects described within these pages, contain dangerous and potentially fatal consequences if you do not exercise proper precautions and follow standard safety procedures. The owner of this site takes no responsibility for injury sustained by anyone attempting to duplicate or utilize any of the information on this site. The information here is strictly for Educational Purposes! -USE AT YOUR OWN RISK!

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7/3/06
Finished bubbler in action!! caught here is a flashback spanning approx 6ft of silicon hose.

Believe it or not, the valve has 'already actuated' at this point!!

will be testing soon with a larger pipe and possibly multiple valves for to suit higher production rates.

test were done using the 7 cell series design, 30% NaOH concentration and power draw once running 10A @ 14.1v (5A at startup).
I was able to successfully run and use a N0.2 oxy acetylene welding tip with a flame up to about 10mm long. melted some thin steel, did a bit of plastic welding all good stuff!

now to get an alternator hooked up to a 240v motor so I dont have to run the car the whole time! :p


MODIFIED on 19/2/06 making it a total of about 150mm long instead 100mm. and changed copper pipe inside to produce smaller bubbled. (cut end of with pliers, then ground two points down to flat angles, drilled 1mm hole in each face).

Makes a lovely bubblin noise

TESTED on 21/2/06.
Filled to approx 3/4, not far below top outlet.
using a #2 gas welding tip, tested by lighting bubbles as they rise to top in a bucket to confirm h2 + 0 being produced, rise tip above water and light, an instant vacuum noise from tip, at same time feeling a twitch from the 4mm silicon hose. hose shows signs of condensation

No actuation occurs at bubbler. no noticable effect to water/bubbles of gas in pipe between bubbler and series cell.

repeated several times.

Removed 1/2 the water from the bubbler, and set about retesting.

When tip is lit above water a noticably more forcful sucking is heard from tip, but still no actuation at all from bubbler. a couple of bubbles rising in the tube from series cell to bubbler burst, and gas bubbles in a wet loop of tube previously moving toward bubbler pause for an instant but then continue.

retested several times

CONCLUSION:
Not sure how its happens exactly but no explosive force is immediately evident,
The bubbler certainly seems to be working well, being no affect of flashback being transferred to cell.

TESTED  22/2/06

ALL SYSTEMS ARE GO!!

tested with the combo cell, still at the lowered bubbler level, and it works great!

Hooked my combo cell (3 x series cell in parallel), running at only 12v (batteries all but flat, brother borrowed my charger again!), electrolyte is approx 15% naoh by weight.

Power draw way down, as expected becuase of electrolyte change and lower voltage, so only pulled 5A @ 11.98v.
Production is still much better than the series cell, and i think was even pressurizing the bubbler to an extent. (Need to note Im using a larger inlet pipe, than outlet pipe on the bubbler)

after filling the bubbler volume (which seem to take ages!) h bubbles confirmed by lighting as the floated to top as before.

upon lighting the welding tip above water, a small yellow flame emitted from tip (approx 5mm long),
flame quickly consumes pressure built up inside bubbler (approx 4sec) and a very loud bang emitted as flame sucks back.

I repeated this only 3 times (it was after 10pm and didnt want the armed police calling round )
I recorded the last attempt onto minDV cam and once I find my firwire cable Ill upload it somewhere (egaas overflow).

STILL NO ACTUATION of overboost valve!
from what i could tell by my play-pause-play-pause stepping thru the video on the camera, a clearly visible yellow flame can be seen propogating up the 4mm outlet pipe to the bubbler, then the obligatory load crack of combustion of the remaining gas in the bubbler.

points to note:

a. no pressure wave gets past the bubbler (as Id hoped of course)
b. the only effect experienced by the tube is the vacuum 'post combustion', which pulled water (that was sitting in tube between cell and bubbler) up the tube in the direction of the bubbler. Doesnt actually make it to the bubbler as pressure builds up again immediately after vacuum occurs, and bubbler starts filling up with H2 again.

Im calling: SUCCESS!!!!

these valves can be found on Nissan turbo engines between years of 84 + 87/88, although Im not 100% the valve is even necessary as the only motive force I can detect is the vacuum 'post combustion'.

K, back to looking like im working hard :p


* 1 3/4" galv steel tube
* brass fittings with rubber washers on outside to seal (from washing maching hot/cold hoses)
* 1/4" copper tube extends below water line for gas input

*'overboost valve' as commonly fitted to 1980 - 87 turbo nissan engines - AFAIK actuates at approx 10-12psi (with std boost on these engines being approx 7-9psi

!!COMPLETELY UNTESTED AS YET!!

starts actuating at 10psi - confirmed


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Click here to continue Drilling into Projects from adam666

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This Website is Created and Maintained by chris--at--OUPower--dot--com (Fix the address for it to work!)
This Project was last updated on: September 25, 2006 10:04am
v7.01

WARNING! Many, if not all of the projects described within these pages, contain dangerous and potentially fatal consequences if you do not exercise proper precautions and follow standard safety procedures. The owner of this site takes no responsibility for injury sustained by anyone attempting to duplicate or utilize any of the information on this site. The information here is strictly for Educational Purposes! -USE AT YOUR OWN RISK!

Click Here to go to my YouTube Channel!!

Click Here to go to our NEW Facebook Discussion Group! This is replacing the old Discussion Board!

Click Here to go to our ARCHIVED Discussion Boards.

Please consider donating to help support this website!