SWG Hydrogen gas build up enclosed pool -- dangerous?

[geempool]

Hello again, i am new and thankful for everyone answering all my questions -- I have just been reading the SWG threads and have learned that hydrogen gas comes out in little bubbles as part of the SWG process since it isn't dissolved as readily as the chlorine. Our whole pool will be enclosed -- could the hydrogen possibly build up in the enclosure and pose some kind of danger? I saw some mention of exploding pool equipment due to running swg without the pump because of miswiring -- it seems like it wouldn't take too much hydrogen to be risky? Thanks for any insight.

 

[mguzzy]

I really doubt it... the exploding scenario the gas builds up in the small volume of the SWG cell. Most of the gas will be absorbed by your water, and anything that is left will dilute in the air in the big room of your pool house. I don't think you will have anything to worry about unless your pool house is the size of a SWG cell.

 

[JamesW]

Hydrogen gas dangerous?

The amount produced per day is about 0.041 lbs (18.6 grams) for a cell that makes 1.45 lbs chlorine gas per day.

The room should have enough air exchange to clear this out without much trouble.

Part of the danger from the cell is due to the fact that the hydrogen is mixed with chlorine gas, which is an even better oxidizer than oxygen.

Because the chlorine gas is mixed with the hydrogen gas in the perfect ratio, the explosion happens very fast.

 

[CrystalRiver]

I really doubt it... the exploding scenario the gas builds up in the small volume of the SWG cell. Most of the gas will be absorbed by your water, and anything that is left will dilute in the air in the big room of your pool house. I don't think you will have anything to worry about unless your pool house is the size of a SWG cell.

It's the combination of the small space of the cell combined with the arcing electricity that is happening in that cell.

 

[geempool]

Thanks @mguzzy @JamesW @CrystalRiver !!

 

[JamesW]

It's the combination of the small space of the cell combined with the arcing electricity that is happening in that cell.

There won’t be any arcing electricity. There's only about 4 volts DC between individual plates, which is not enough to arc across the gap.

I suspect that the generation of chlorine and hydrogen radicals generated at the plates is what initiates the reaction.

The lasers in the demonstrations break apart the chlorine bonds in some of the chlorine molecules. This is referred to as homolytic fission and it produces two unpaired chlorine atoms.

Cl2 + UV --> 2Cl•

These free atoms of chlorine are called radicals and they begin a chain reaction that proceeds until the reactants are consumed.

Chlorine and hydrogen are probably produced as radicals at the cell plate walls before they combine with another radical to form the chlorine or hydrogen molecule.

The reaction of the chlorine and hydrogen detonating in the cell and plumbing produces about 425 psi or more pressure in the cell.