High c2h2 but low h2
High c2h2 but low h2
(OP)
Dear all,
Is it possible to get dga result with high c2h2 but low h2?
Thank you
Is it possible to get dga result with high c2h2 but low h2?
Thank you
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RE: High c2h2 but low h2
Concentrations depend on generation rate profile over time and removal rate profile over time, among other things.
One thing to note is Ostwald solubility coeff of H2 (0.04) is much lower than C2H2 (1.0). For equilibrium concentrations between oil and gas, that means a much higher fraction of H2 migrates into the gas. In the case where the transformer is breathing, we might conclude a lot more H2 is lost as a result of breating than C2H2 is lost. (although Ostwald coeff isn't the whole story since it relates equilibriums but not time to reach equilibrium).
So let's say you had some type of fault event a long time ago and generated lots of H2 and C2H2 and stopped generating. After that, the transformer breathers for a long time and loses a lot of H2 but not much C2H2. Then you come along and sample and see much higher C2H2/H2 ratio than you would have seen initially.
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(2B)+(2B)' ?
RE: High c2h2 but low h2
RE: High c2h2 but low h2
What do the other gases look like?
How has the pattern changed over time?
I assume this is main tank (not LTC)?
What type of preservation system (N2 blanket with bottle/regulator/relief, conservator, breather etc).
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(2B)+(2B)' ?