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Dry cell size
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jkcerda Offline
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Post: #1
Dry cell size
what size plates would I need to get 2.5-3.5 LPM of Hydrogen?

is there ANY way to calculate the number & size of plates needed to accomplish this using 12V?

Current plate size is 7.875 x 5.625, not including the tabs shown .
THE rear plate is my template BTW, that is why it shows extra holes, I am using that pattern to cut the plate and the gasket s well.
the tabs allow me to make the plate n + or - as I see fit.
not sure if I should have 2 water inlets (lower corners) or just one inlet & one outlet centered, Using KOH for the electrolyte,
[Image: 149262_540557869320916_605913224_n.jpg]
04-01-2013 10:46 AM
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mike Offline
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Post: #2
RE: Dry cell size
(04-01-2013 10:46 AM)jkcerda Wrote:  what size plates would I need to get 2.5-3.5 LPM of Hydrogen?

is there ANY way to calculate the number & size of plates needed to accomplish this using 12V?

Current plate size is 7.875 x 5.625, not including the tabs shown .
THE rear plate is my template BTW, that is why it shows extra holes, I am using that pattern to cut the plate and the gasket s well.
the tabs allow me to make the plate n + or - as I see fit.
not sure if I should have 2 water inlets (lower corners) or just one inlet & one outlet centered, Using KOH for the electrolyte,
[Image: 149262_540557869320916_605913224_n.jpg]

The first thing you need to do is correct one problem: You have way to many edges on those plates. You need to eliminate as much of those edges as you can. You only need one hole at the bottom and one hole at the top for electrolyte and HHO respectively. All of the rest of those edges will decrease the efficiency of you r system. Electricity will try to flow from the edges and not the faces of the plates. That flow is inefficient. Reduce those edges as much as possible.

As for size, you'll need to go bigger if you want to make that much HHO. I would say at least 8" x 8" - or equivalent in an rectangular config like your drawing. You can use 13 plates in this config: -NNNNN+NNNNN- .

But what are you using this cell for? We use about 1-1/2 - 2 LPM for 15 liter semi engines. We run our cells at about 25 amps. What engine is this cell for that need so much HHO?

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04-02-2013 12:32 AM
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jkcerda Offline
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Post: #3
RE: Dry cell size
(04-02-2013 12:32 AM)mike Wrote:  The first thing you need to do is correct one problem: You have way to many edges on those plates. You need to eliminate as much of those edges as you can. You only need one hole at the bottom and one hole at the top for electrolyte and HHO respectively. All of the rest of those edges will decrease the efficiency of you r system. Electricity will try to flow from the edges and not the faces of the plates. That flow is inefficient. Reduce those edges as much as possible.

As for size, you'll need to go bigger if you want to make that much HHO. I would say at least 8" x 8" - or equivalent in an rectangular config like your drawing. You can use 13 plates in this config: -NNNNN+NNNNN- .

But what are you using this cell for? We use about 1-1/2 - 2 LPM for 15 liter semi engines. We run our cells at about 25 amps. What engine is this cell for that need so much HHO?

just trying to make a very nice & efficient dry cell, changed design , staggered holes & tabs, gasket is .040 thk, number of plates can vary to any amount, active area inside gasket is about 30 SQ".
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04-03-2013 03:46 PM
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jkcerda Offline
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Post: #4
RE: Dry cell size
few variations, I am keeping in mind the top holes/ports are wasted space since the gas is up there trying to get out.
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04-04-2013 10:15 AM
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mike Offline
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Post: #5
RE: Dry cell size
I'd turn that cell 90 degrees so you have less wasted space. Also, the gas will get out of one hole as well as 4.

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04-05-2013 09:36 AM
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jkcerda Offline
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Post: #6
RE: Dry cell size
(04-05-2013 09:36 AM)mike Wrote:  I'd turn that cell 90 degrees so you have less wasted space. Also, the gas will get out of one hole as well as 4.

good point.
04-05-2013 01:15 PM
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jkcerda Offline
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Post: #7
RE: Dry cell size
rotated the unit, less wasted space at the gas port that way
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04-05-2013 04:55 PM
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mike Offline
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Post: #8
RE: Dry cell size
Looks good. Make some.

I might also add that quick connect type connections to your cell are likely going to be problematic. We used to use them too, but switched to a tab with a hole so we could bolt the cables onto the plate. We don't put tabs on the neutral plates. The laser cutting guys can make both types of plate pretty easily.

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04-07-2013 02:00 PM
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jkcerda Offline
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Post: #9
RE: Dry cell size
http://www.youtube.com/watch?feature=pla...gum0cIBVpE
ok, seems I got a leak, tightened up the bolts a bit.
got a flash back after lighting up the needle inflator end
I used 12GA wire , and I had 2 test leads of a lot smaller gauge that melted .

anyways, 18 plate unit, +nnnn-nnnn+nnnn-, I did not get to see how much output the unit is doing, I need a fluke to check the input voltage, I hooked it up straight to my alternator for the positive & used the batteries ground
(This post was last modified: 04-10-2013 01:20 PM by jkcerda.)
04-10-2013 01:19 PM
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mike Offline
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Post: #10
RE: Dry cell size
You can connect both positive and negative to the battery.

If you're melting your cables, then you need to back off on the electrolyte. You're pulling too many amps. You can also get a constant current PWM to control the amps. That's the best solution.

4 neutral plates will tend to run a little hotter. So be sure you don't run that cell too hard. Or you'll have a steamer on your hands. Better is 5 neutral plates. But 4 will work. Just don't over do the amps.

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04-10-2013 06:55 PM
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