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ericnickel
07-14-2009, 10:39 PM
I put together this dry cell and not getting the results I think I should be. To generate 8amps cold I need 12 tsp per 2 cups of water. (the unit hold just shy of 2 cups) That seems like an awful lot of lye. I'm scared to add any more. The jar that I use to mix the water and lye gets VERY hot while mixing the two together. I'm only producing .75 LPM as well. Also, after running this configuration for a half hour, the solution is full of little 'snowflakes'. I am using distilled water but am now thinking that the water I bought isn't what it says it is. Any ideas people?
Thanks,
Eric

http://smacksboosters.110mb.com/BB%20Smack%20Document.pdf

Mulenson
07-14-2009, 11:12 PM
I put together this dry cell and not getting the results I think I should be. To generate 8amps cold I need 12 tsp per 2 cups of water. (the unit hold just shy of 2 cups) That seems like an awful lot of lye. I'm scared to add any more. The jar that I use to mix the water and lye gets VERY hot while mixing the two together. I'm only producing .75 LPM as well. Also, after running this configuration for a half hour, the solution is full of little 'snowflakes'. I am using distilled water but am now thinking that the water I bought isn't what it says it is. Any ideas people?
Thanks,
Eric

http://smacksboosters.110mb.com/BB%20Smack%20Document.pdf
Eric, what do you mean? "the unit holds 2 cups" Do you have a reservoir for that dry cell? how big is that? I have basically the same cell, with the end plates being Neg. and the inside plate, just one, being positive. I have a 2 gallon reservoir. It has proven to keep the heat down. I have mixed 1 lb of lye to 1 Gallon of water. I am currently rebuilding my design and am incorporating 2 cells. I was not getting results either, until I mixed the solution stronger with about 1 1/4 pounds to 1 gallon. My amps got to about 22 and my output was close to 2 liters/ minute. With no PWM. Keep it up. Make a large reservoir and increase the lye! mulenson

ericnickel
07-14-2009, 11:48 PM
The cell holds just under 2 cups and the remainder I put in my bubbler. What about the 'snow flakes'? If I let it go further, it turns into brow sludge like it has in the past. 12 tsp of lye to 2 cups water seemed a bit excessive to me, it isn't out of the norm?

DodgeViper
07-15-2009, 07:18 AM
Use KOH and Distilled Water... Period...

ericnickel
07-15-2009, 07:18 PM
Thanks for your reply Viper but it didn't realy answer any of my questions.

Roland Jacques
07-15-2009, 09:53 PM
For KOH it takes 10 Lbs per gallon to reach 28% saturation. (lye is in that same neighborhood) 12 tsp is nothing!! http://www.ashtachemicals.com/products/kohchem.htm

By the way 96 watts producing .75 LPM is very good in my book. I'll bet it a good mmw
(cant find my MMW calculator link, and right now I'm having a hard time to remember how to do it long hand.)

Roland Jacques
07-15-2009, 10:13 PM
Found it.http://site.altpropulsion.com/MMWCalc.htm

8 amps at 13 volts is about 7MMW that's a great numbers. double or triple your lye and you should be getting your production up there.

ericnickel
07-15-2009, 11:26 PM
Thanks Roland for your info and encouragement.

hg2
07-16-2009, 08:17 AM
For KOH it takes 10 Lbs per gallon to reach 28% saturation. (lye is in that same neighborhood) 12 tsp is nothing!! http://www.ashtachemicals.com/products/kohchem.htm

By the way 96 watts producing .75 LPM is very good in my book. I'll bet it a good mmw
(cant find my MMW calculator link, and right now I'm having a hard time to remember how to do it long hand.)




Roland

I think you may be off by a few lbs. on your 28% KOH to water ratio.This measurement is by weight and water weighs about 8.33 lbs per US gallon. therefore it takes about 2 1/2 lbs. of KOH to 1 gallon distilled to get a 28% ratio.

Also here's another MMW calc. that has more detailed info:

http://prophecyworld.net/Calculator/

gashead
07-16-2009, 09:14 AM
im using 2 tsps of lye per gallon of water and getting 15 amps.

Roland Jacques
07-16-2009, 09:29 AM
Roland

I think you may be off by a few lbs. on your 28% KOH to water ratio.This measurement is by weight and water weighs about 8.33 lbs. therefore it takes about 2 1/2 lbs. of KOH to 1 gallon distilled to get a 28% ratio.

Also here's another MMW calc. that has more detailed info:

http://prophecyworld.net/Calculator/


You're right! Nice catch. I think the 10.54 lbs is the weight of water plus the weight of the KOH that equals 28%. Thanks
http://www.ashtachemicals.com/products/kohchem.htm

hg2
07-16-2009, 02:29 PM
im using 2 tsps of lye per gallon of water and getting 15 amps.


You must have a wet cell design Gashead,they require much less e-lyte than dry cells.

ericnickel
07-16-2009, 07:55 PM
im using 2 tsps of lye per gallon of water and getting 15 amps.

I see this all the time. How are some guys getting such good output of gas with what I would consider a weak mixture. What is your setup?

hg2
07-17-2009, 03:24 AM
I see this all the time. How are some guys getting such good output of gas with what I would consider a weak mixture. What is your setup?



Ericnickel

To use that weak a ratio of e-lyte they have to be using a wet cell set up such as a smack design.

drumacc
07-17-2009, 05:12 PM
And I'm pulling about 20A on two banks of 6-plate cell ( 6plate cell x2 ). Getting about 1.5 LPM.

BUT I'm still working on seeing a diff in mileage. Just added a o2 spacer. Will see what happens next.