You're probably right, Leon; the comments caught me crossways after a long day, and I hit send before think. AAMOF, I've been following the NG for 3-4 years, just don't have a lot to say. I figure 2 eyes, 2 ears and only 1 mouth has to mean something.
Thanks for the nudge, Leon!
Colin
He is a lot more difficult to come by, particularly in the quantities that would be needed for large generators.
Looking up the difference, I see that H is significantly better than He at high temperature but not so much at lower temperatures. In fact, H gets _much_ better at high temperature. Its lower mass really shows up.
What I kept telling you... :)
I don't know what your definition of a "high" temperature is, but the ~2X factors occur by 200F or thereabouts.
Stator operating limits are just about there with typical alarm setpoints at 110 C.
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