Sorry For The Repeat Question - Amps Per Square Inch?

[spencyg]

[Bob Boyce]

[spencyg]

[Bob Boyce]

[MarkinAustralia]

On my findings what Bob has explained is the single biggest failing of many designs on the internet. they do not have enough active plate area for the current they are pushing through. As such they make good coiffee machines...drop the beans in and presto.
Often these designs have the full 12 volts through them...not good.
There defence is you get more gas at higher temps...in actual fact you get more water vapour. The fact many of these cells need cooling demonstrates clearly energy is being wasted..and a lot of energy at that.
many do this to save money on SS or to make them compact.
I wrote to someone yesterday explaining that science governs the efficiency we can opperate at (with straight DC) and science also governs the results in the egines we use.
Thanks Bob..i remeber phoning you about this
mark

[spencyg]

I just ordered my electrode material. I have 10 pcs of 7x8 16 ga 316, and 2 pcs of 7x16 16 ga 316. I figured with the gaskets (hypalon 1/8"), and the non-flooded zone at the top of the plates, the 7x8 will give me an honest 6x6 cell surface area, and the endplates are a tad larger to allow me to blast in some electrical tabs with the CNC mill. I did order 1 extra internal plate (shooting for 10 cells @ 14V) in case of a programming error with the gas and water add port drilling cycle at the top of each plate.

Now...please observe my math and tell me what you think:

At 1/4 amp per square inch, I'll be running (6x6)*(10 cells)*(0.25A/in2) = 90A @ 1.4V = 126 watts. Is this right, or should it be 90A @ 14v? If so, thats 1260 watts. Scenario "A" means 9A of draw @ 14V. Scenario B means 90A @ 14V. I like A better. When I install this system in the truck, I should be just fine with my stock alternator and a dual battery system assuming A is correct. If I need to provide 90A to this system, than I'm looking at a second alternator.

Spence

[kumaran]

[spencyg]

[ElectroGasMan]

[kumaran]

[Bob Boyce]

[spencyg]

[ElectroGasMan]

[wphuang]

[kevinsatterfield]