I think that there is a strong correlation between the ambient and the assumed power output.
Dave -----Original Message----- From: Arnaud Kodeck <arnaud.kod...@lakoco.be> To: vortex-l <vortex-l@eskimo.com> Sent: Thu, Dec 13, 2012 4:41 am Subject: RE: [Vo]:Direct heating of Celani's wire at EU cell of MFMP The frequency of T° ambient and P_Xs are the same (Around 50 minutes). Is ir a coincidence? Arnaud > On 2012-12-13 03:29, Craig wrote: > > This is so strange. I set the data in View Test Celani Cell #2, found > here: > > > > http://data.hugnetlab.com/ > > > > to view back 4 hours. Then I selected only P_Xs Low. Notice that the > > excess power is oscillating between 4 watts and 8 watts, in a very > > precise rhythm, with each wave appearing to have the same shape, and > > with each wave lasting about an hour. I also see that the wave appears > > to be tapering with the lows becoming higher and the heights become > > lower. There also seems to be a correlation with T_Ambient, but why? > > Whatever this is, it didn't happen with the previous overnight run with > power applied to the inert wire (and the active wire partially loaded, > in hydrogen atmosphere). This is a user-submitted image from the MFMP > blog showing it: > > http://i.imgur.com/bB383.png > (note that "Power (Red)" actually shows W instead of bar) > > From 2012-12-12 00:00 to about 10:00, external glass temperature (under > 50W of indirect heating) didn't seem to fluctuate very much with ambient > temperature. However with direct heating (48W) it does quite much. > > The main difference between those two runs is that the one with indirect > heating had a starting hydrogen pressure of 2 bar (which increase with > heat, of course), while the latter ones started at 1 bar, probably > offering less thermal inertia (but still not explaining how glass > temperature variations can be larger than ambient ones, assuming that > these are the ones which drive them). > > Cheers, > S.A.
