For a long time I have always known that it is hard to compare PPM leakage to volumetric leakage. We always try to not get involved in the debate and I have seen many people with PHD's fight over this subject. Well I found this good report from the Houston Advanced Research Center (HARC) on this subject.
The report focused on using a portable optical gas imaging device (CO2 laser) as it compared to the old PPM.
Here is a good excerpt:
" In all cases, the calculated mass rate were several orders of magnitude larger than the bagging results. Bagging results show the smallest detected leak had a mass emissions rate of 5.63E-07 kg/hr, compared to a correlated mass rate five orders of magnitude higher at 0.012 kg/hr."
The report focused on using a portable optical gas imaging device (CO2 laser) as it compared to the old PPM.
Here is a good excerpt:
" In all cases, the calculated mass rate were several orders of magnitude larger than the bagging results. Bagging results show the smallest detected leak had a mass emissions rate of 5.63E-07 kg/hr, compared to a correlated mass rate five orders of magnitude higher at 0.012 kg/hr."