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Oxyhydrogen generator
Our first try of the oxyhydrogen generator was a stack of stainless steel plates with bolts through. The problem was there was pretty poor contact between the bolts and the plates so I've changed it to use metal sleeves between the plates as below.


So I found a little stainless steel tube in a box of old copier parts that neatly fitted over the stainless bolts I had to bolt the plates together.

I cut that into 10mm lengths (twice the plate spacing) and covered with heatshrink. I just stuck all 16 spacers into a length of heatshrink, heated it then cut them and trimmed them up so the steel was clear at each end. I also cut up some plastic tubes that were big enough to fit a steel spacer with heatshrink on inside it (I used some old pens). They were about 4.5mm long (4.5+4.5+thickness of steel=10mm). 32 of them. You can probably do without those if your steel is a bit thicker but the steel I used was really thin so they just help keep it spaced right.


Then it was just matter of bolting them all together, staggering the spacers to make alternating plates connected to each other. I just stacked all the sheets together and drilled four snug bolt holes, putting a bolt in each as I drilled to keep everything lined up (I numbered the plates to get the order right later on). I made the two opposite corners share the same pole. So you can see the next plate that goes on will touch the steel tube on the lower right and upper left, but the other two go through that plate and touch the next plate. I fairly generously enlarged the holes of the corners where a spacer goes through a plate to give a reasonable clearance between the plate and the heatshrink covered steel spacer - but not wider than the plastic spacer :)


You can see the staggering below. You need to put spacers on the ends of the appropriate bolts to keep them away from the wrong plate. Then I just bolted it up tight to get the steel spacers pushing good and hard into each plate.

You can see that when I cut the steel plates I left two plates with long tabs to connect to the power source. I used the 3rd and 6th plate as the connectors because it fitted the jar lid well, but I don't imagine it would matter.


And running very briefly sucking 15A! It's running too hot for the wires at that current but I had 2 tsp of baking soda in the ~900ml jar.


We filled a balloon with oxyhydrogen and set it off with a long string. It might not look it but it's a big bang. You would not want be anywhere near this and it could be set off pretty easily. Even small bubbles of oxyhydrogen give a big bang. It's probably best to use it as you go and not store any quantity of it.

Prelim Results (20 Jul 2008)

Basic test:
We ran a 3 reps of 3 treatments to compare the fuel efficiency of a 4 stroke generator. The treament order was randomised within in each rep. The treatments were:
1: H+ producing hydrogen and enjecting into engine
2: H producing hydrogen but not enjecting into engine
3: H- not producing hydrogen

The power supply was a computer power supply using the 12v line. This was powered by the generator itself.

Electrolyte was 3g/l (~0.5tsp/l) of sodium bicarbonate (baking soda) with tap water. 16 litres of electrolyte was pre-mixed, from which the hydrogen jar was refreshed at the beginning of each run.
The generator fuel tank was drained. A single run of the generator was performed with 50ml of fuel to get a baseline time and to heat the engine so all runs would be with a hot engine.

100ml of fuel was poured into the generator for each run. The engine was run until it stopped from lack of fuel (ran dry). Current and electrolyte temperature were recorded each minute.

In the H- treatment the oxyhydrogen generator was not running so there are no results for amps or temperature in those treatments.

Results

Hydrogen production was measured in rep 3, treatment H when it was otherwise being wasted. At the start of the run when the current was 8.2A the unit happened to be producing 100ml in exactly one minute.

Ax = Amps each minute(x)
Tx = Temperature each minute(x)

rep

tmt

Minutes

Dec. mins

air temp

A1

A2

A3

A4

A5

A6

A7

T1

T2

T3

T4

T5

T6

T7

1

H

6.45

6.75

10.3

 

7.85

7.95

8.07

8.13

8.18

8.19

 

13.4

13.4

14.3

15.2

15.7

16.7

17.7

1

H+

6.48

6.80

10.3

 

8.33

8.67

8.89

9.1

9.22

9.49

 

13.4

14.6

15.8

16.4

16.7

17.4

 

1

H-

7.1

7.17

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

H-

7.18

7.30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

H

6.57

6.95

10

 

8.6

8.72

8.8

8.94

9.03

9.11

 

13.7

13.4

15.5

15.5

16.1

16.7

 

2

H+

6.5

6.83

10.3

 

8.48

8.61

8.8

8.97

9.14

9.23

 

13.7

14.6

15.2

15.5

17.1

18.3

 

3

H

6.49

6.82

10.3

 

8.2

8.28

8.43

8.55

8.67

8.76

 

13.4

15.2

15.5

15.2

16.1

17.4

 

3

H-

7.28

7.47

10.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

H+

7

7.00

10

 

8.24

8.46

8.71

8.87

8.94

9.08

 

13.4

14.6

15.2

14.9

16.1

17.7

 

4

H+

6.14

6.23

 

 

8.44

8.59

8.72

8.84

8.95

9.06

 

14

13.7

14.9

15.8

16.1

16.1

 

H- Avg

 

7.31

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H Avg

6.84

8.22

8.32

8.43

8.54

8.63

8.69

13.50

14.00

15.10

15.30

15.97

16.93

H+ Avg

 

6.88

 

 

8.35

8.58

8.80

8.98

9.10

9.27

 

13.50

14.60

15.40

15.60

16.63

17.80

 

H- SD

 

0.150308

H SD

 

0.101835

H+SD

 

0.107152

H- SE

 

0.086781

H SE

0.058794

H+ SE

 

0.061864









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Welcome#001
  by RJ
  Wednesday 22 Jul 2008 03:29:08 GMT
 
  We would love to hear about hydrogen production rates from others doing this. Please post your experiences and other feedback.
 
Welcome#002
  by Sid
  Wednesday 22 Jul 2008 03:44:15 GMT
 
  What are peoples' thoughts on whether or not using a petrol generator is a good test bed?
 
Welcome#003
  by Tommy
  Thursday 23 Jul 2008 04:49:31 GMT
 
  It's nice to see some actual statistics for once, I see you have produced a Brown's Gas generator.
I believe you would be better off oscillating the input power and finding the resonance of the browns gas plate generator or as some call it the rjenerator. Good work keep it up.
 
Hi Tommy#004
  by Sid
  Thursday 23 Jul 2008 22:56:54 GMT
 
  I've never been comfortable with the term "Brown's Gas". It's not like Yull Brown invented hydrogen and oxygen. The electrolysis of water into h2 and o2 was done about 100 years before Brown decided to name it after himself!
Fair call on the power oscillation. We are currently building the necessary bits, so we should soon be able to test that too! Thanks for the input.
 
Air Intake#005
  by Billy
  Thursday 10 Dec 2008 08:18:47 GMT
 
  I am curious if enjecting the oxyhydrogen into the air intake is comparable with the typical use in a vehical where it is introduced after the carburator. Usually this is via a vacuum line.
Great experiment. We are looking to do something similar for a science fair project.
 
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