The second bubbler is the safety bubbler. It has a very strong container to withstand the pressure pulse of a flashback. A check valve is used to protect the scrubber bubbler from the pressure pulse. A pop-off pressure relief can be a good addition. No pressure guage, because it would be destroyed by the pressure pulse of a flashback.
The bubbler functions can be combined into a single bubbler, but cleansing of the gas is not as good as 2 seperate functional bubblers, and no pressure guage.
Using distilled or filtered rain water in the bubblers allows the water to become replacement water for the cell stack. This assures that recaptured electrolyte from the vapor is re-applied to the cell stack and not lost. I use safety bubbler water for the scrubber bubbler, then scrubber bubbler water in the cell stack.
Any charge lost to the bubbler water from the gas would be minimal, and would only serve to energize the water more that will be used as replacement water in the cell stack.
BobStatistics: Posted by Bob Boyce — Mon Sep 25, 2006 2:34 pm
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