Here is a Run I did Nov. 6 that shows what can happen if water is
exposed directly the internal thermal storage without a damping
influence, like intervening insulation:
http://www.mtaonline.net/~hheffner/Graph2Sa.png
This clearly shows things can get fairly spikey, depending on the
internal geometry and control mechanisms.
I think the additional bump in power in the real data around T400
may simply be water reaching the level of an exit port in the
30x30x30 cm steel box. This requires a lot more analysis though.
I've seen some evidence such a port exists in the front left of the
interior box, just above the level of the flanges where the 30x30x30
cm interior box is bolted together. Where the water level is
depends greatly on the pump's volume per stroke at pressure. Other
fluctuations may simply be due to transient conditions in which water
is kept out of the interior box by steam pressure, and then let back
in when boiling rate drops with lowered surface exposure, thus
increasing the exposed surface area, and thus boiling rate. That's
the explanation in my mental model. I haven't read the posts
regarding this topic so don't know what the issues are.
I'll resume quiet mode now.
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/
