A special experimental setup has been conceived to investigate the leak tightness of tube connectors for gas supply at high-temperature solid oxide fuel cells. In this way, it was possible to carry out a helium leak test under future operating conditions, i.e. at 950 deg C an a differential pressure of 200 mbar. The measurements revealed leak rates in the range from 10-2 to 10-3 mbar x l x s-1 at 950 deg C. The leak rate can be further optimized by varying the gap and surface finish. Helium permeation through material walls does not play any significant role. The tests have shown that the connectors are suitable for use at 950 deg C.
Helium leak test at 950 deg C
Heliumleckprüfung bei 950 Grad C
1998
6 Seiten, 4 Bilder
Aufsatz (Konferenz)
Englisch
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